Materials Science and Engineering: A最新文献_第7页

Counting the coupled strengthening of α-Al(Fe,Mn)Si dispersoids and β″ precipitates in an Al-Mg-Si-Mn-Fe alloy: optimizing the solid-solution temperature

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.148051

Y.H. Gao , J.Z. Zhou , Y. Xiang , C.X. Li , P. Xu , C. Liu , Y.F. Zhao , J. Ma , G. Liu

{"title":"Counting the coupled strengthening of α-Al(Fe,Mn)Si dispersoids and β″ precipitates in an Al-Mg-Si-Mn-Fe alloy: optimizing the solid-solution temperature","authors":"Y.H. Gao , J.Z. Zhou , Y. Xiang , C.X. Li , P. Xu , C. Liu , Y.F. Zhao , J. Ma , G. Liu","doi":"10.1016/j.msea.2025.148051","DOIUrl":"10.1016/j.msea.2025.148051","url":null,"abstract":"<div><div>For Al alloys, it is generally preferred to have a high solid-solution temperature <em>T</em> to enhance the strength, as this allows for effective dissolution of coarse constituents and facilitates the formation of sufficient precipitation (<em>i.e.</em>, <em>β″</em> in Al-Mg-Si alloys). However, this work presents an interestingly nonmonotonic relationship between strength and solid-solution temperature <em>T</em> in a commercial 6082 alloy (Al-Mg-Si-Mn-Fe-based), where the highest strength is achieved at a moderate <em>T</em> of ∼530°C. Detailed microstructural characterizations further reveal that this behavior can be attributed to the competitive precipitation of <em>α</em>-Al(Fe,Mn)Si dispersoids and <em>β″</em> precipitates, which are governed by the following mechanisms: (i) A relatively low <em>T</em> of 500∼530°C fails to dissolve coarse constituents adequately, resulting in insufficient precipitation of <em>α</em>-Al(Fe,Mn)Si and <em>β″</em> phases and consequently leading to low strength. (ii) Further evaluating solid-solution temperature <em>T</em> to 530∼570°C greatly encourages the precipitation of <em>α</em>-Al(Fe,Mn)Si dispersoids by costing constituents. However, this also depletes Si solutes primarily required for <em>β″</em> precipitation, thereby impairing overall strength. (iii) The optimal compromise between <em>α</em>-Al(Fe,Mn)Si and <em>β″</em> particles occurs at a moderate <em>T</em> (∼530°C), resulting in the greatest strength of the alloy. The corresponding strengthening model is also exploited to clarify this evolution, aiming to offer some clues on managing the competitive relationship among multiple strengthening contributors in aging-hardenable Al alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148051"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of heat treatment on microstructure and damping properties of MnCu-based damping alloy prepared by laser powder-bed-fusion (LPBF)

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.148050

Conghui Ma , Kaibin Huang , Changjun Wang , Changyong Liu , Zhiyuan Liu , Zhangwei Chen

{"title":"Effect of heat treatment on microstructure and damping properties of MnCu-based damping alloy prepared by laser powder-bed-fusion (LPBF)","authors":"Conghui Ma , Kaibin Huang , Changjun Wang , Changyong Liu , Zhiyuan Liu , Zhangwei Chen","doi":"10.1016/j.msea.2025.148050","DOIUrl":"10.1016/j.msea.2025.148050","url":null,"abstract":"<div><div>MnCu alloys are widely recognized for their high damping performance and strength, making them ideal for aerospace and marine applications. This study aims to explore the effects of solution aging on the microstructure, phase transformation, mechanical properties, and damping characteristics of MnCuNiFe alloys fabricated via Laser Powder Bed Fusion (LPBF). A series of advanced characterization techniques, including EDS, high-resolution imaging, and XRD, were employed to analyze microstructural evolution and its impact on performance. The results reveal that increasing solution temperatures generally enhances the strength and ductility of the alloy compared to conventionally cast alloys, while \"strip-like\" Fe enrichment becomes more prominent near phase boundaries. Heat treatment enhances damping capacity threefold compared to as-deposited samples, primarily due to spinodal decomposition, which promotes the formation of tweed-like microstructures, nano-twin layers, and fct ordered structures. Additionally, the development of Cu-rich nanodomains (50–85 nm thick), spherical Al oxides, and strip-like Mn oxides surrounding α-Mn precipitates contributes to improved energy dissipation. These microstructural changes, confirmed by EDS and high-resolution imaging, facilitate internal friction mechanisms that enhance damping performance. The study showcases LPBF as a promising method to fabricate high-performance damping MnCu alloys, providing insights into microstructural design and optimization through heat treatment.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148050"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous improvement in strength and ductility of 3D-printed refractory high-entropy alloys by addition of molybdenum

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.148042

Shien Liu , Bang Dou , Shihai Sun , Liang Wang , Yao-Jian Liang , Yunfei Xue

{"title":"Simultaneous improvement in strength and ductility of 3D-printed refractory high-entropy alloys by addition of molybdenum","authors":"Shien Liu , Bang Dou , Shihai Sun , Liang Wang , Yao-Jian Liang , Yunfei Xue","doi":"10.1016/j.msea.2025.148042","DOIUrl":"10.1016/j.msea.2025.148042","url":null,"abstract":"<div><div>Molybdenum (Mo) is an important strengthening element in refractory high-entropy alloys. However, it is difficult to produce a Mo containing alloy with uniform elemental distribution because of the high melting point of Mo. This work employed 3D printing, also known as laser additive manufacturing (LAM), technique to prepare TiZrVNbAl-system refractory high-entropy alloys (RHEAs) with different Mo contents. Due to the high temperature and strong convection in melting pool, uniform elemental distribution is achieved in LAM TiZrVNbAl-system RHEAs. With increasing Mo, the solid-liquid intervals of alloys increase, which promotes the formation of fine equiaxed growth, and reducing in the mean grain sizes. Meanwhile, a large difference in the atomic radius between the Mo and the TiZrVNbAl RHEA results in strong solid-solution strengthening, and hence a 34 % increase in the yield strength. These results imply that the LAM is a promising technique to produce RHEAs with uniform elemental distribution, as well as good strength−ductility balance, which is expected to be able to widen the potential applications these refractory alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"928 ","pages":"Article 148042"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deformation induced microstructure and texture evolution in additively manufactured Ti-6Al-4V sheets via friction stir welding

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.148043

W. Malik , N.F. Lone , D. Bajaj , M.H. Abidi , S. Chaudhary , M.K. Mohammed , D.L. Chen , A.N. Siddiquee

{"title":"Deformation induced microstructure and texture evolution in additively manufactured Ti-6Al-4V sheets via friction stir welding","authors":"W. Malik , N.F. Lone , D. Bajaj , M.H. Abidi , S. Chaudhary , M.K. Mohammed , D.L. Chen , A.N. Siddiquee","doi":"10.1016/j.msea.2025.148043","DOIUrl":"10.1016/j.msea.2025.148043","url":null,"abstract":"<div><div>Deformation induced via welding often governs the applicability of advanced materials which could either enhance or degrade the mechanical properties. Therefore, this study investigates the deformed microstructure and consequent texture evolution in friction stir welded (FSWed) electron beam printed Ti-6Al-4V plates. While as-additively manufactured alloy exhibited a columnar prior <em>β</em> grain structure along the building direction with equiaxed prior <em>β</em> grains in the perpendicular plane, coarser <em>α</em> needles within prior <em>β</em> grains were observed in the stir zone (SZ) and a bimodal microstructure was observed in the thermo-mechanically affected zone (TMAZ). The highest hardness was obtained in TMAZ, thus deviating from the usual trend of recording the highest hardness in SZ. The FSWed sample exhibited a joint efficiency of 77 %. The reduction is attributed to the presence of tungsten-cobalt rich particles and coarser β grains in the SZ which led to the reduction in hardness/strength or in other words formed a soft zone. A strong texture and variant selection with a significant prevalence of <11 <span><math><mrow><mover><mn>2</mn><mo>‾</mo></mover></mrow></math></span> 0>/60° <em>α/α</em> grain boundaries were observed in the as-additively manufactured alloy. In contrast, the FSWed joint displayed random texture with varying intensities across each characteristics zone of FSW, thereby highlighting the influence of cooling rates and deformation on texture evolution. Also, a slight increase in texture intensity and some variant selection was observed at the center of SZ although less pronounced than the as-additively manufactured alloy.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148043"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grain boundary character evolution in stainless steel 316L upon laser powder-bed fusion and post-process heat treatment

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.148029

Ming Luo , Hao Wang , Vitor V. Rielli , Xiaozhou Liao , Simon P. Ringer , Sophie Primig , Nima Haghdadi

{"title":"Grain boundary character evolution in stainless steel 316L upon laser powder-bed fusion and post-process heat treatment","authors":"Ming Luo , Hao Wang , Vitor V. Rielli , Xiaozhou Liao , Simon P. Ringer , Sophie Primig , Nima Haghdadi","doi":"10.1016/j.msea.2025.148029","DOIUrl":"10.1016/j.msea.2025.148029","url":null,"abstract":"<div><div>Grain boundary engineering (GBE) has emerged as a promising method for improving mechanical properties and diminishing the susceptibility to corrosion in polycrystalline materials, via engineering recrystallized microstructures with high fractions of low-energy grain boundaries (GBs). Conventional GBE utilizes complex cycles of deformation and annealing to provide the necessary driving forces for recrystallization. This is not applicable to near-net-shape manufacturing, such as metal additive manufacturing (AM). To overcome this limitation, an alternative approach involves adjusting the strain energy introduced during the AM process instead of mechanical deformation, to generate the required driving forces for recrystallization. This requires thorough understanding of the evolution of the solidification microstructure, dislocation structure and the GB character as functions of the AM processing parameters. In this study, we systematically demonstrate the impact of processing parameter variations during laser powder bed fusion and heat treatments on GB evolution in stainless steel 316L. We provide comprehensive analyses of the texture, grain structure, GB habit planes, cellular structure, and micro-segregation, and make a link to mechanical properties. The differences in recrystallization response as a function of AM processing parameters are attributed to variations in the densities of dislocations and the chemical heterogeneity in the as-solidified microstructures. We also introduce a novel concentric scanning technique to achieve site-specific control over the recrystallization response. This facilitates the design of microstructures with both superior thermal stability and GBE-related advantages, offering a pathway towards making high-performance alloy AM parts with engineered and possibly site-specific microstructures, superior mechanical properties, and complex shapes.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148029"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the overlooked role of microstructure to explain post-punching fatigue performance of advanced high-strength steel

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-13 DOI: 10.1016/j.msea.2025.147946

Nader Heshmati , Mohammad Hoseini-Athar , Erik Olsson , Annika Borgenstam , Henrik Sieurin , Joachim Larsson , Tung Lik Lee , Peter Hedström

{"title":"On the overlooked role of microstructure to explain post-punching fatigue performance of advanced high-strength steel","authors":"Nader Heshmati , Mohammad Hoseini-Athar , Erik Olsson , Annika Borgenstam , Henrik Sieurin , Joachim Larsson , Tung Lik Lee , Peter Hedström","doi":"10.1016/j.msea.2025.147946","DOIUrl":"10.1016/j.msea.2025.147946","url":null,"abstract":"<div><div>This study compares the role of microstructure on post-punching fatigue properties in three advanced high-strength steels (AHSSs) with a high-strength low-alloy (HSLA) steel commonly used in heavy-duty truck chassis. Microstructure characterization, tensile testing, high cycle fatigue (HCF) testing, fatigue crack growth rate (FCGR) testing, and neutron residual stress measurements are conducted. Punching significantly alters the microstructure, causing microstructure refinement, sub-grain formation, defect creation, tensile residual stresses, and a work-hardened shear-affected zone (SAZ) around, and a rough fracture zone, inside the punched hole. At 10<sup>5</sup> cycles, the HCF performance is primarily governed by the fatigue crack growth resistance of the as-rolled microstructure, with minimal sensitivity to punching. However, near the fatigue limit, post-punching fatigue failure is strongly related to strain localization when significant strength difference exists between microconstituents (e.g., martensite and ferrite). Strain localization also promotes sub-grain formation, reducing the local threshold stress intensity factor range <em>(ΔK</em><sub><em>th</em></sub>), thus facilitating fatigue crack initiation. In microstructures with smaller strength differences (e.g., ferrite and bainite), sub-grains, together with surface roughness and residual stress, contribute significantly to the post-punching fatigue limit reduction. These findings provide insights into mechanisms of punching-induced fatigue performance degradation, offering potential strategies to optimize fatigue performance of AHSS for new applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 147946"},"PeriodicalIF":6.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143395541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fracture behaviour of functionally graded bi-material interface produced by wire arc additive manufacturing

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-12 DOI: 10.1016/j.msea.2025.148034

J.L. Galán Argumedo, A.C. Riemslag, M.J.M. Hermans, V.A. Popovich

{"title":"Fracture behaviour of functionally graded bi-material interface produced by wire arc additive manufacturing","authors":"J.L. Galán Argumedo, A.C. Riemslag, M.J.M. Hermans, V.A. Popovich","doi":"10.1016/j.msea.2025.148034","DOIUrl":"10.1016/j.msea.2025.148034","url":null,"abstract":"<div><div>Wire arc additive manufacturing (WAAM) offers a novel approach to fabricate functionally graded components. By changing the wire consumable between layers, chemical grading can be used to obtain specific properties across a part's volume. This is an interesting approach to design large metal components that achieve unconventional performance in demanding engineering applications, such as sulphide-resistant pressure vessels or sea ballast piping with extended lifetime. However, challenges derived from dissimilar material combinations draw the need to study the effect of compositional grading on the mechanical properties. This study focuses on the deformation and fracture toughness behaviour of WAAM-fabricated high-strength low-alloy (HSLA) and austenitic stainless (AS) steel bi-material specimens, particularly examining the diluted interface layer obtained during deposition. Tensile testing results indicate that the elastic modulus at the interface matches that of un-diluted AS steel (157 ±17 GPa) along the build direction. Fracture toughness showed a lower J<sub>IC</sub> (180 kJ/m<sup>2</sup>) when compared to the undiluted AS steel (459 ±69 kJ/m<sup>2</sup>) and HSLA steel (408 ±25 kJ/m<sup>2</sup>). Scanning electron microscopy and electron backscatter diffraction are used to establish a connection between the microstructure at the interface and the observed mechanical properties. It is concluded that deformation at the interface is in large controlled by the deformation-induced martensitic transformation of metastable austenite. These results underline the influence of chemical dilution on the deformation mechanisms and fracture behaviour of HSLA and AS steel bi-material parts, which needs to be accounted for in the design of parts composed by this bi-metal couple.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"928 ","pages":"Article 148034"},"PeriodicalIF":6.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving synergistic enhancement of strength and plasticity of (TiC+Ti5Si3)/TC4 composites by dual-scale near-network structure design

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-12 DOI: 10.1016/j.msea.2025.148022

Tiantao He , Chunyu Yue , Bowen Zheng , Feng Gu , Xiaojiao Zuo , Fuyu Dong , Xuejian Lin , Yinxiao Wang , Hongjun Huang , Xiaoguang Yuan

{"title":"Achieving synergistic enhancement of strength and plasticity of (TiC+Ti5Si3)/TC4 composites by dual-scale near-network structure design","authors":"Tiantao He , Chunyu Yue , Bowen Zheng , Feng Gu , Xiaojiao Zuo , Fuyu Dong , Xuejian Lin , Yinxiao Wang , Hongjun Huang , Xiaoguang Yuan","doi":"10.1016/j.msea.2025.148022","DOIUrl":"10.1016/j.msea.2025.148022","url":null,"abstract":"<div><div>To solve the problem of low plasticity in homogeneous particle-reinforced composites,micro-nano dual-scale near-network (TiC + Ti<sub>5</sub>Si<sub>3</sub>)/TC4 composites were prepared by in-situ melting-casting technology. The microstructural evolution, strengthening and friction mechanisms of micro-nanoscale composites were systematically investigated. The results showed that with the increase of the reinforced phase content, the morphology of micron-sized TiC changes significantly from the initial short plume to granular gradually, and the nano-sized Ti<sub>5</sub>Si<sub>3</sub> particles change from small particles to ellipsoidal gradually precipitated at the β-Ti and α/β interfaces. The (3 vol%TiC+3 vol%Ti<sub>5</sub>Si<sub>3</sub>)/TC4 composites (TMCs-2) exhibits excellent mechanical properties with compressive strength of 1774 MPa, plasticity of 24.5 % and hardness of 52.8 HRC. The increase in strength of the composites is attributed to the synergistic effect of matrix (fine grain strengthening, solid solution strengthening) and particle strengthening. The special structural design can effectively hinder the propagation of cracks, lead to crack deflection and passivation, and delay the fracture of composites. The addition of TiC and Ti<sub>5</sub>Si<sub>3</sub> reinforced phases can improve the shear resistance of the surface and subsurface layers of the composites, which can inhibit the emergence of microcracks during sliding wear process, and the wear resistance is significantly improved. At the same time, the micro-nano structure design effectively avoided stress localization and significantly improved the deformation coordination ability of the composites.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148022"},"PeriodicalIF":6.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain rate sensitivity in a metastable β-Ti alloy with stress-induced martensitic transformation: Role of ω phase on yield strength

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-12 DOI: 10.1016/j.msea.2025.148041

Yu Fu , Huabei Peng , Wenlong Xiao , Yuhua Wen , Xinqing Zhao , Chaoli Ma

{"title":"Strain rate sensitivity in a metastable β-Ti alloy with stress-induced martensitic transformation: Role of ω phase on yield strength","authors":"Yu Fu , Huabei Peng , Wenlong Xiao , Yuhua Wen , Xinqing Zhao , Chaoli Ma","doi":"10.1016/j.msea.2025.148041","DOIUrl":"10.1016/j.msea.2025.148041","url":null,"abstract":"<div><div>This study investigated the effect of strain rates on the stress-induced martensitic transformation (SIMT) and mechanical properties of a Ti-15Nb-5Zr-4Sn-1Fe metastable β-Ti alloy, with a focus on the role of the ω phase on the initial activation of SIMT at the onset of yielding. The results demonstrated that increasing the strain rate from 5 × 10<sup>−4</sup> s<sup>−1</sup> to 1 × 10<sup>−1</sup> s<sup>−1</sup> enhanced the yield strength while reducing ultimate tensile strength and strain-hardening ability due to the slightly suppressed SIMT. The presence of dispersed ω nanoparticles within the β matrix impeded the initial activation of long-range SIMT without preventing its occurrence, which partially contributed to the increased yield strength with increasing strain rate. Once the long-range SIMT was activated at higher stress levels, SIMT proceeded more readily, causing a more pronounced stress plateau and more homogeneous formation of martensite across different β grains at higher strain rates. These findings emphasize the significant influence of the ω phase on the activation of SIMT under high strain rate deformation. Controlling the ω phase could potentially regulate SIMT and optimize the mechanical properties of metastable β-Ti alloy for high strain rate deformation.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148041"},"PeriodicalIF":6.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties of neutron-irradiated and un-irradiated Zr-Nb alloys: Experiments and damage-involved crystal plasticity modeling

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-12 DOI: 10.1016/j.msea.2025.148032

Jingyu Zhang , Haisheng Zhang , Peng Wang , Jianjun Mao , Xiaosong Liu , Zhen Liu , Yaolin Guo , Shurong Ding , Shiyu Du

{"title":"Mechanical properties of neutron-irradiated and un-irradiated Zr-Nb alloys: Experiments and damage-involved crystal plasticity modeling","authors":"Jingyu Zhang , Haisheng Zhang , Peng Wang , Jianjun Mao , Xiaosong Liu , Zhen Liu , Yaolin Guo , Shurong Ding , Shiyu Du","doi":"10.1016/j.msea.2025.148032","DOIUrl":"10.1016/j.msea.2025.148032","url":null,"abstract":"<div><div>Zirconium alloys are widely used in current nuclear reactors, and their components and fabrication process are continuously optimized to enhance accident tolerance. It is imperative to combine experimental research with advanced modeling to study the mechanical properties of un-irradiated and neutron-irradiated new-type zirconium alloys. In this study, Zr-1Nb and Zr-2Nb alloys are irradiated under different fast neutron fluences. Uniaxial tensile tests are conducted on both neutron-irradiated and un-irradiated specimens at room temperature and 380 °C. Irradiation hardening and embrittlement are observed in the macroscale stress-strain curves. A new damage-involved crystal plasticity model is proposed and numerically implemented, considering the effects of irradiation doses, temperature, alloy compositions, and microstructure. The predicted mechanical responses have a good agreement with the current experimental data and the reported values in the literatures, validating the new crystal plasticity model and computational method. The contributions from solution hardening, precipitate hardening, irradiation hardening, and grain boundary hardening to macroscale yield strength are discussed. It is found that the prismatic <a> and pyramidal <c+a> slips are the dominant plastic deformation mechanisms. This study has provided valuable experimental data on neutron-irradiated Zr-Nb alloys and offers a feasible damage-involved crystal plasticity modeling method to capture their mechanical responses, contributing to the development of advanced Zr-<em>x</em>Nb alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"927 ","pages":"Article 148032"},"PeriodicalIF":6.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0