Materials Science and Engineering: A最新文献_第5页

The adjustability of hot workability of FGH96 superalloy toward the effect of oxygen on the microstructure

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-21 DOI: 10.1016/j.msea.2025.148103

Weiwei Zhao , Na Liu , Zhou Li , Sha Zhang , Peng Zhang , Yufeng Liu , Lin Zhang , Xuanhui Qu

{"title":"The adjustability of hot workability of FGH96 superalloy toward the effect of oxygen on the microstructure","authors":"Weiwei Zhao , Na Liu , Zhou Li , Sha Zhang , Peng Zhang , Yufeng Liu , Lin Zhang , Xuanhui Qu","doi":"10.1016/j.msea.2025.148103","DOIUrl":"10.1016/j.msea.2025.148103","url":null,"abstract":"<div><div>The crucial influence of oxygen impurities on the hot workability and subsequent mechanical properties of the FGH96 superalloy, a factor previously neglected, is emphasized in this study. The mechanism by which oxygen reduces hot workability has been revealed: oxygen promoted the precipitation of MC-type carbides along dynamic recrystallization (DRX) grain boundaries, which inhibited DRX grain growth. Stored energy remained within the small grains, and dislocation pile-ups at the MC/γ interface lead to flow instability. Both of which contribute to reduced hot workability, where the softening effect of DRX, the hardening effect of small grains, and flow instability collectively produced a complex response in flow stress. These effects have been integrated into the constitutive model as an oxygen parameter. In order to prevent flow instability in high-oxygen superalloys, a hot working optimization method was proposed, which involves increasing the temperature and reducing the strain rate. This method requires that for every 100 ppm increase in oxygen content, the strain rate be reduced by (1.47–2.91)-fold or the deformation temperature increased by 24–30 °C to achieve comparable hot workability to low-oxygen superalloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148103"},"PeriodicalIF":6.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512546","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

Structural and mechanical properties of refractory Nb30X25Ti25Al15V5 (X= Zr, Mo) high-entropy alloys

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-21 DOI: 10.1016/j.msea.2025.148053

João H. Mazo , Carolina Soares , Guilherme K. Inui , Marcelo F. de Oliveira , Juarez L.F. Da Silva

{"title":"Structural and mechanical properties of refractory Nb30X25Ti25Al15V5 (X= Zr, Mo) high-entropy alloys","authors":"João H. Mazo , Carolina Soares , Guilherme K. Inui , Marcelo F. de Oliveira , Juarez L.F. Da Silva","doi":"10.1016/j.msea.2025.148053","DOIUrl":"10.1016/j.msea.2025.148053","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) represent a significant breakthrough in materials science, offering numerous compositional possibilities for alloy design and a broad range of systems with remarkable property combinations. This study aims to enhance our understanding of HEAs through experimental and first-principles computational characterization of the structural and mechanical properties of two Nb-based refractory high-entropy alloys (RHEAs), specifically <figure><img></figure> ( <figure><img></figure> ), identified as promising materials for aerospace applications. Our experimental results confirmed a single-phase solid solution for both alloys, with theoretical and experimental predictions indicating a cubic B2 structure for <figure><img></figure> = Zr and a body-centered cubic (bcc) structure for <figure><img></figure> = Mo. The alloys exhibit an estimated liquidus temperature above 1800°C and densities lower than those of conventional Ni superalloys, with experimental values below 7.1gcm<sup>−3</sup>, accurately predicted by theoretical calculations. All polycrystalline elastic constants and Vickers’ hardness increased when Zr was replaced with Mo in the <figure><img></figure> alloy, which also changed the plastic behavior from ductile to completely brittle. Both alloys exhibited significant lattice distortion, with V inducing the largest deviation from the ideal average bond distances expected in a perfect crystal. From an electronic standpoint, both systems exhibit metallic characteristics, possessing a significant density of states at the Fermi level. Moreover, an analysis of the local density of states revealed that the alloy containing Zr exhibits a predominance of Nb states at the Fermi level, in contrast to the Mo system, where Ti states are predominant.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148053"},"PeriodicalIF":6.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488745","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

Revisiting the effect of localized alloying elements on stacking fault energy in austenitic steel

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-21 DOI: 10.1016/j.msea.2025.148074

Zhenzhen Chen , Heyu Zhu , Yanfei Cao , Hongwei Liu , Zhipo Zhao , Xingqiu Chen , Dianzhong Li

引用次数: 0

Comparative study on the microstructural evolution and performance of Cu-5Ag wires during cold-drawing from powder metallurgy and cast states

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-20 DOI: 10.1016/j.msea.2025.148055

Yunhe Zhou , Xiaojuan Gong , Ping Zhang , Ning Tang , Kenta Yamanaka , Akihiko Chiba , Yunping Li

{"title":"Comparative study on the microstructural evolution and performance of Cu-5Ag wires during cold-drawing from powder metallurgy and cast states","authors":"Yunhe Zhou , Xiaojuan Gong , Ping Zhang , Ning Tang , Kenta Yamanaka , Akihiko Chiba , Yunping Li","doi":"10.1016/j.msea.2025.148055","DOIUrl":"10.1016/j.msea.2025.148055","url":null,"abstract":"<div><div>Improving the mechanical properties without sacrificing the electrical conductivity of Cu-Ag alloys is of great importance due to their widespread application. In this study, a Cu-5wt.%Ag alloy fabricated using powder metallurgy (PM) and casting (CA) methods were processed by cold drawing. The effects of varying cold-drawing strains on the microstructure, mechanical properties, and electrical conductivity were systematically investigated. The results revealed that after cold drawing, the PM wire exhibited finer and more dispersed Ag filaments, smaller grain sizes, and a more pronounced <111> texture compared to the CA wire. Under a cold-drawing strain of 5.42, the PM wire demonstrated a significantly higher tensile strength (1015 MPa) compared to the corresponding CA wire (864 MPa), while maintaining comparable electrical conductivity (78 % IACS). This study provides both experimental evidence and theoretical insights into the development of specialized high-strength, high-conductivity Cu-Ag alloy wire materials and offers a theoretical pathway for the development of powder metallurgy derived fine-fiber composite materials with exceptional comprehensive performance.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148055"},"PeriodicalIF":6.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510423","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

Exploration of hypereutectoid compositions for achieving and enhancing superelasticity in biomedical Ti–Au–Mo alloys

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-19 DOI: 10.1016/j.msea.2025.148095

Naoki Nohira , Wan-Ting Chiu , Akira Umise , Masaki Tahara , Hideki Hosoda

{"title":"Exploration of hypereutectoid compositions for achieving and enhancing superelasticity in biomedical Ti–Au–Mo alloys","authors":"Naoki Nohira , Wan-Ting Chiu , Akira Umise , Masaki Tahara , Hideki Hosoda","doi":"10.1016/j.msea.2025.148095","DOIUrl":"10.1016/j.msea.2025.148095","url":null,"abstract":"<div><div>β (bcc) Ti–Au based biomedical alloys are attractive due to their excellent biocompatibility, X-ray radiographic imaging properties, and shape memory effects. However, increasing the Au content beyond the eutectoid composition (4.2 mol% Au, β-Ti = α-Ti (hcp) + Ti<sub>3</sub>Au, in the binary system) presents a challenge because the intermetallic compound Ti<sub>3</sub>Au readily forms at hypereutectoid compositions, leading to increased brittleness in the alloys. Thus, the feasibility of hypereutectoid compositions was explored in this work using the Ti–Au–Mo ternary system. The addition of Mo was expected to significantly suppress the eutectoid reaction by enhancing the stability of the β phase. In solution-treated alloys, it was found that Ti–Au–5Mo alloys with up to 6 mol% Au (approximately 20 mass% Au, 5 karat) exhibited good cold workability, achieving a 95 % reduction in thickness. Furthermore, in the Ti–6Au–5Mo alloy, a β single phase was successfully quenched without the formation of Ti<sub>3</sub>Au. The stability of the β phase increased with higher Au content, with the reduction rate in the martensitic transformation temperature of −85 K/mol% Au. Additionally, the Ti–6Au–5Mo alloy exhibited clear superelasticity at room temperature, with a 4.8 % shape recovery strain and a 2.7 % superelastic strain. Besides, the effect of Ti<sub>3</sub>Au precipitation through heat treatment on mechanical properties was also evaluated. These findings provide a solid foundation for the development of functional low-karat Ti–Au alloys for advanced medical devices.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"928 ","pages":"Article 148095"},"PeriodicalIF":6.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465479","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

Balancing the strength and ductility of MnFeCoNi high-entropy alloy through regulating precipitates and nanostructures

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-19 DOI: 10.1016/j.msea.2025.148099

C.J. Li , L.W. Zhang , J.P. Wei , Z.Y. Xu , P. Gao , Q. Lu , Q. Yuan , J.H. Yi

引用次数: 0

Improved mechanical properties and extraordinary plastic isotropy of ultrafine-grained pure Zn prepared by spark plasma sintering using fine particle and heat treatment

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-19 DOI: 10.1016/j.msea.2025.148097

Takahiro Mineta , Kohei Nagayama , Hiroyuki Sato , Yasuhiro Kamite

{"title":"Improved mechanical properties and extraordinary plastic isotropy of ultrafine-grained pure Zn prepared by spark plasma sintering using fine particle and heat treatment","authors":"Takahiro Mineta , Kohei Nagayama , Hiroyuki Sato , Yasuhiro Kamite","doi":"10.1016/j.msea.2025.148097","DOIUrl":"10.1016/j.msea.2025.148097","url":null,"abstract":"<div><div>In this study, fine-grained Zn samples with excellent mechanical properties were prepared via spark plasma sintering (SPS) using Zn fine particles and heat treatment. The as-sintered sample prepared by SPS exhibited fine grain size and random crystallographic texture. Moreover, heat treatment induced recrystallization and reduced the strain accumulated in the vicinity of the grain boundaries of the as-sintered samples. Compared to as-cast samples, the plastic anisotropy of the as-sintered and heat-treated samples was significantly reduced, attributable to the refined grain size and random crystal texture achieved through sintering. Mechanical testing revealed superior properties in the sintered and heat-treated samples, with the sample heat-treated at 650 K demonstrating an exceptional elongation exceeding 80 %. The remarkable mechanical performance is linked to the initial microstructural characteristics and dynamic recrystallization (DRX) occurring during deformation. These findings suggest that the combination of SPS and heat treatment is an effective strategy for enhancing the mechanical properties of Zn, presenting potential applications in advanced materials and biomaterials.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148097"},"PeriodicalIF":6.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474279","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

High-temperature pre-aging induced coherent precipitation for Concurrent strength and conductivity enhancement in Cu-Mn-Co-P alloys

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-19 DOI: 10.1016/j.msea.2025.148098

Chengzhi Zhang , Rui Zhou , Xue Xiao , Yuhan Wang , Weilin Gao , Qingkui Li , Jilin He

引用次数: 0

Strengthening-toughening mechanism of carbon-coated TiC/ZrC secondary phase doped molybdenum alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-19 DOI: 10.1016/j.msea.2025.148096

Boliang Hu , Chaofan Quan , Shengjie Ma , Qianjun Zhang , Hairui Xing , Li Wang , Ping Hu , Xinwen Zhou , Yanchao Li , Xinrui Zhao , Pengfa Feng , Kuaishe Wang

{"title":"Strengthening-toughening mechanism of carbon-coated TiC/ZrC secondary phase doped molybdenum alloy","authors":"Boliang Hu , Chaofan Quan , Shengjie Ma , Qianjun Zhang , Hairui Xing , Li Wang , Ping Hu , Xinwen Zhou , Yanchao Li , Xinrui Zhao , Pengfa Feng , Kuaishe Wang","doi":"10.1016/j.msea.2025.148096","DOIUrl":"10.1016/j.msea.2025.148096","url":null,"abstract":"<div><div>Control of the oxygen content is the key to the strengthening and toughening of the TZM (Mo-Ti-Zr-C) alloy. To reduce the oxygen content, Mo-C@ZrC-C@TiC alloy was synthesized by the liquid phase dispersion method, and then TiC/ZrC was carbon-coated in situ based on the TZM alloy components. Compared with Mo-ZrC-TiC-C and Mo-ZrH<sub>2</sub>-TiH<sub>2</sub>-C alloys, the oxygen content of the synthesized Mo-C@ZrC-C@TiC alloy was significantly reduced to 160 ppm, and the uniform dispersion of the secondary phase was ensured, thus improving the density and hardness of the alloy. The tensile strength at room temperature was 915.4 MPa and the elongation was 14.8 %. Compared with Mo-ZrC-TiC-C and Mo-ZrH<sub>2</sub>-TiH<sub>2</sub>-C, the tensile strength and elongation increased by 10.4 % and 5.1 %, respectively, while the elongation increased by 17.8 % and 24.1 %, respectively. The recrystallization temperature of the alloy increased, and its strength was maintained after annealing. This study illustrates that the carbon-coated second-phase exhibits solid solution strengthening at high temperatures and dispersion strengthening at low temperatures.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148096"},"PeriodicalIF":6.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478631","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

Effects of deformation on the mechanical properties and paint-bake response of 7075 pre-hardening alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-02-18 DOI: 10.1016/j.msea.2025.148062

Lin Hua , Dong Zhang , Pengfei Wei , Zhili Hu

{"title":"Effects of deformation on the mechanical properties and paint-bake response of 7075 pre-hardening alloy","authors":"Lin Hua , Dong Zhang , Pengfei Wei , Zhili Hu","doi":"10.1016/j.msea.2025.148062","DOIUrl":"10.1016/j.msea.2025.148062","url":null,"abstract":"<div><div>The 7075 pre-hardening alloy combines good formability and strength, which has great potential for forming of structural components. In this paper, the mechanical properties and paint-bake response of the 7075 pre-hardening alloy applied different deformation were investigated by uniaxial tensile tests. The results showed that the pre-hardening alloy obtains a significant strength enhancement with increasing of deformation. A 2 % deformation can bring a strength increase of more than 100 MPa. After paint-bake treatment, the strength of the pre-hardening alloy with different deformation exceeds the peak-aging (T6) state of 7075. Microstructures such as dislocations and precipitates were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). It was shown that GPII zones in the pre-hardening alloy can hinder the movement of dislocations, resulting in dislocation multiplication. The GPII zones can inhibit the dislocation-promoting effect on the precipitation, causing fine precipitates in the deformed pre-hardening alloy after paint-bake treatment. In contrast, the precipitates in 7075-T4 (GPI-rich) alloy applied the same treatment become significantly coarse.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"929 ","pages":"Article 148062"},"PeriodicalIF":6.1,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488743","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