Materials Characterization最新文献

High-temperature creep behaviors and microstructure characteristics of HIP-manufactured TiB/(TA15-Si) composites hip -制备TiB/(TA15-Si)复合材料高温蠕变行为及显微组织特征

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-18 DOI: 10.1016/j.matchar.2025.115309

Shuai Wang , Zishuo Ma , Lujun Huang , Xin Chen , Qi An , Rui Zhang , Wenqi Liu , Fanchao Meng , Lin Geng

{"title":"High-temperature creep behaviors and microstructure characteristics of HIP-manufactured TiB/(TA15-Si) composites","authors":"Shuai Wang , Zishuo Ma , Lujun Huang , Xin Chen , Qi An , Rui Zhang , Wenqi Liu , Fanchao Meng , Lin Geng","doi":"10.1016/j.matchar.2025.115309","DOIUrl":"10.1016/j.matchar.2025.115309","url":null,"abstract":"<div><div>This study investigated the creep behavior of hot isostatic pressing (HIP) manufactured 3.5 vol% TiB/(Ti-6.5Al-2Zr-Mo-V-0.3Si) composites. In-situ synthesized TiB whiskers and precipitated silicides were observed in the HIP-processed composite. To characterize its high-temperature performance, creep tests were conducted at 650 °C, 700 °C, and 750 °C at various applied stresses. The results revealed creep stress exponents of 4.79, 4.96, and 5.11 at 650 °C, 700 °C, and 750 °C, respectively. Corresponding threshold stresses were estimated as 31.5 MPa, 16.3 MPa, and 8.5 MPa. The post-creep microstructure was analyzed. It was found that creep cavities formed within the titanium matrix and at prior particle boundaries (PPBs) where TiB agglomerated, with creep rupture primarily occurring at the PPBs. Silicides coarsened during creep exposure, while smaller-sized silicides exhibited superior effectiveness in pinning dislocations. TiB whiskers acted as a skeleton, hindering the softening deformation of the TA15 matrix, and the fracture of TiB induced by dislocation pile-up was also observed.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115309"},"PeriodicalIF":4.8,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322721","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

The effect of inhomogeneously distributed β-Nb on confined martensitic transformation 不均匀分布的β-Nb对受限马氏体相变的影响

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-17 DOI: 10.1016/j.matchar.2025.115301

Yuxi Yang , Mingxuan Li , Hua Tao , Shun Han , Yong Li , Chunxu Wang , Weihong Gao , Bin Sun , Yudong Fu , Xianglong Meng

{"title":"The effect of inhomogeneously distributed β-Nb on confined martensitic transformation","authors":"Yuxi Yang , Mingxuan Li , Hua Tao , Shun Han , Yong Li , Chunxu Wang , Weihong Gao , Bin Sun , Yudong Fu , Xianglong Meng","doi":"10.1016/j.matchar.2025.115301","DOIUrl":"10.1016/j.matchar.2025.115301","url":null,"abstract":"<div><div>The confined martensitic transformation mechanisms in spatial constraint strategies can provide different combinations of mechanical properties and unprecedented functional properties. In this study, we construct TiNiNb alloys with different β-Nb phase morphologies and distributions in the cross-section and longitudinal section by rolling deformation and analyze the confined martensitic transformation behavior and mechanical properties. It is shown that the inhomogeneous distribution of β-Nb dispersoids produces heterogeneous microstructures, where the NiTi matrix inside the dense β-Nb exhibits nanometer-sized grains, while the matrix around the dispersed β-Nb has micrometer-sized grains. This inhomogeneous distribution characteristic mitigates the obstructive effect of β-Nb on the thermally induced martensitic transformation during the cooling process, causing an increase in martensitic transformation temperature. Similarly, the restraining effect of β-Nb on the stress-induced martensitic transformation during deformation is affected, leading to a decline in the critical stress, which has the possibility to raise the upper limit of the superelastic temperature range. Furthermore, the combined role of β-Nb with dislocation interactions and grain size effects provides a degree of synergistic strength-ductility enhancement. This study offers an available avenue for the development of controllable TiNiNb alloys by modulating the microzone with β-Nb.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115301"},"PeriodicalIF":4.8,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313233","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

A comprehensive characterization of improved microstructure and enhanced mechanical properties of butt joints of rail U71Mn steel welded by a novel flash-friction hybrid welding process 采用新型闪光-摩擦复合焊接工艺改善U71Mn钢轨对接接头组织和力学性能的综合表征

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-16 DOI: 10.1016/j.matchar.2025.115304

Jinhong Tan , Shanshan Cao , Xin-Ping Zhang

{"title":"A comprehensive characterization of improved microstructure and enhanced mechanical properties of butt joints of rail U71Mn steel welded by a novel flash-friction hybrid welding process","authors":"Jinhong Tan , Shanshan Cao , Xin-Ping Zhang","doi":"10.1016/j.matchar.2025.115304","DOIUrl":"10.1016/j.matchar.2025.115304","url":null,"abstract":"<div><div>A novel flash-friction hybrid welding (F-FHW) method combining flash butt welding (FBW) and linear friction welding (LFW) incorporated into a patented welding system was developed to realize robust butt welding of heavy rail U71Mn steel with improved microstructures and superior mechanical properties of welded joints. In the F-FHW, a specific friction vibration is introduced in the flash butt welding process to reduce welding heat input, while enhancing the movement of softened plasticized material in the welding region. Both of the vibration and the enhanced plastic flow of material work together to suppress the formation of the ferrite softening layer in the joint, refine the pearlitic structure and inhibit cementite spheroidization in the weld metal zone of the joint. Consequently, the mechanical properties including hardness, tensile strength and ductility of the welding zone and even the whole welded joint have been greatly improved. Remarkably, F-FHW joints show an increase by 15 % in tensile strength and dramatically improved elongation about five times higher, compared with FBW joints. Fracture takes place in the heat affected zone of the F-FHW joint instead of the weld metal zone with a mixed ductile-brittle mode.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115304"},"PeriodicalIF":4.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313232","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

Improving recrystallization of ultrasonic welded joint of SiCp/Al composites via pulsed current 脉冲电流改善SiCp/Al复合材料超声焊接接头的再结晶

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-16 DOI: 10.1016/j.matchar.2025.115305

Zhuobin Sun , Mengwei Shen , Zeyang Li , Xiao Yang , Jingwei Liang , Wenquan Wang , Zhimin Liang , Xinge Zhang , Yongmei Liang

{"title":"Improving recrystallization of ultrasonic welded joint of SiCp/Al composites via pulsed current","authors":"Zhuobin Sun , Mengwei Shen , Zeyang Li , Xiao Yang , Jingwei Liang , Wenquan Wang , Zhimin Liang , Xinge Zhang , Yongmei Liang","doi":"10.1016/j.matchar.2025.115305","DOIUrl":"10.1016/j.matchar.2025.115305","url":null,"abstract":"<div><div>In this study, we innovatively applied pulsed current to enhance the recrystallization of SiC<sub>p</sub>/Al composites during ultrasonic welding for the first time. The results show that the grain size of Al matrix is significantly refined from 15 μm to 2 μm by pulsed current. The optimization of grain size observably increases the tensile load of the joint from 2.0 kN to 3.7 kN. The improvement in recrystallization is attributed to the pulsed current facilitating the movement and multiplication of the dislocations in the Al matrix. Meanwhile, due to the lattice mismatch between SiC and Al, the dislocation is difficult to pass through the SiC<sub>p</sub>, leading to substantial dislocation be accumulated at the SiC/Al interface. Moreover, the electron density around the particles is higher due to the shape effect of particles on electron motion, which will provide a driving force for the evolution of accumulated dislocation towards grain boundary. The process of recrystallization will consume accumulated dislocation and promote the subsequent movement of dislocations. Ultimately, the grain size of the SiC<sub>p</sub>/Al composites joint is refined and the peak failure load is increased.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115305"},"PeriodicalIF":4.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306362","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 enhancement of strength, ductility and wear resistance of TC4 matrix composites via boron nitride incorporation 氮化硼的掺入提高TC4基复合材料的强度、延展性和耐磨性

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-16 DOI: 10.1016/j.matchar.2025.115302

Pengyuan Li , Le Liu , Liyuan Xue , Shoukai Xu , Jiantuo Zhao , Xueyan Feng , Yiya Zhang , Mingyang Li , Longlong Dong , Junjie Xu

{"title":"Simultaneous enhancement of strength, ductility and wear resistance of TC4 matrix composites via boron nitride incorporation","authors":"Pengyuan Li , Le Liu , Liyuan Xue , Shoukai Xu , Jiantuo Zhao , Xueyan Feng , Yiya Zhang , Mingyang Li , Longlong Dong , Junjie Xu","doi":"10.1016/j.matchar.2025.115302","DOIUrl":"10.1016/j.matchar.2025.115302","url":null,"abstract":"<div><div>TiB<sub>w</sub>/TC4(N) composites were synthesized through a combined process of ball milling and spark plasma sintering (SPS). The investigation systematically characterized the microstructural evolution, tensile properties, and wear resistance of the composites as a function of BN addition. Experimental results demonstrated that BN decomposed into boron (B) and nitrogen (N) during the sintering process. B atoms reacted in situ with the matrix to form TiB whiskers (TiB<sub>w</sub>), while N atoms were incorporated into the matrix, enhancing its strength through solid solution strengthening. Notably, the composites with 0.15 wt% BN exhibited an exceptional strength-ductility synergy (1240 MPa/14.7 %), achieving simultaneous improvements in strength and ductility compared to pure TC4 and surpassing the mechanical properties of previously reported TC4 composites in the literature. The superior mechanical performance of the composites results from a synergistic combination of grain refinement strengthening, solid solution strengthening, and load transfer mechanisms. In addition, the composites exhibited markedly enhanced wear resistance in comparison with the pure TC4 alloy. This study proposes an effective strategy for developing titanium matrix composites with improved strength, ductility, and wear resistance for advanced engineering applications.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115302"},"PeriodicalIF":4.8,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322722","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

Anisotropy-induced nonuniform deformation behavior in polysynthetically twinned TiAl bicrystals at 900 °C 900℃时合成孪晶TiAl双晶各向异性诱导的非均匀变形行为

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-15 DOI: 10.1016/j.matchar.2025.115299

Yunlu Ma , Jieren Yang , Zedong Liu , Chuan Rong , Ying Liu , Ruirun Chen

{"title":"Anisotropy-induced nonuniform deformation behavior in polysynthetically twinned TiAl bicrystals at 900 °C","authors":"Yunlu Ma , Jieren Yang , Zedong Liu , Chuan Rong , Ying Liu , Ruirun Chen","doi":"10.1016/j.matchar.2025.115299","DOIUrl":"10.1016/j.matchar.2025.115299","url":null,"abstract":"<div><div>Polysynthetically twinned (PST) TiAl crystals exhibit remarkable high-temperature mechanical properties, and their well-aligned lamellar orientations via directional technology enable a potential increase in service temperature to 900 °C. To address the strong deformation anisotropy of PST single crystals, this study explores deformation coordination between two PST crystals to achieve the strength-ductility trade-off via tailored orientation composition. Focusing on two bicrystals B1 (65°, 8°) and B2 (20°, 15°) with distinct orientation compositions, EBSD examined their orientations, and the misorientation Δθ<sub>12</sub> is confirmed to be similar, as 61° and 66° respectively, while introducing a single crystal of S1 (23°) as a reference. SEM and EBSD analyses elucidate deformation behaviors, including crack propagation, dislocation slip, and potential twinning, and the further interfacial failure mechanism and dislocation mechanism were discussed via TEM observation. Results demonstrate that the deformation of bicrystals always initiates at the relatively softer grain and propagates to harder counterparts. Bicrystals' deformation compatibility determines whether the nonuniform deformation occurs and whether the work hardening effect or the strain coordination effect is the dominant strengthening mode. Elevated temperatures facilitate γ-phase twinning (γ variant-dependent) and α<sub>2</sub>-phase dislocation slip (related to α<sub>2</sub> cylindrical slip tendency). Further discussion on the dislocation bahaviors indicates that ordinary dislocations significantly affect the initial deformation capacity, while the ability to activate newborn twins and superlattice dislocations affects the interfacial failure tolerance capacity and subsequent deformation coordination. A further understanding of bicrystals' deformation anisotropy facilitates achieving the strength-ductility trade-off by designing appropriate lamellae composition.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115299"},"PeriodicalIF":4.8,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306328","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

Enhanced galvanizing properties in advanced high-strength steel by introducing higher aluminum contents in the zinc bath 通过在锌浴中引入更高的铝含量来提高高级高强度钢的镀锌性能

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-15 DOI: 10.1016/j.matchar.2025.115284

Sang-Hoon Shin , Shin-Wook Seo , Chang-Gon Jeong , Young-Ha Kim , Yoon-Uk Heo

{"title":"Enhanced galvanizing properties in advanced high-strength steel by introducing higher aluminum contents in the zinc bath","authors":"Sang-Hoon Shin , Shin-Wook Seo , Chang-Gon Jeong , Young-Ha Kim , Yoon-Uk Heo","doi":"10.1016/j.matchar.2025.115284","DOIUrl":"10.1016/j.matchar.2025.115284","url":null,"abstract":"<div><div>The optimum aluminum (Al) content in a zinc (Zn) bath was investigated to enhance galvanizing properties through a comparative study in three steel grades: interstitial free (IF), low silicon-containing (0.3Si/Mn, Si/Mn = 0.3), and high silicon-containing (1.0Si/Mn, Si/Mn = 1.0) steels. Wettability was evaluated based on wetting force and Fe<sub>2</sub>Al<sub>5-x</sub>Zn<sub>x</sub> inhibition layer coverage. IF steel exhibited the best wettability at 0.25 wt% Al-containing Zn bath. However, higher Al concentrations led to the formation of coarse Fe<sub>2</sub>Al<sub>5-x</sub>Zn<sub>x</sub> particles at the Zn/steel interface, reducing the wetting force. In contrast, 0.3Si/Mn and 1.0Si/Mn steels showed a steady increase in wetting force with higher Al contents. In Si- and Mn-containing steels (0.3Si/Mn and 1.0Si/Mn), surface oxides formed during annealing were reduced by the aluminothermic reaction during immersion, consuming Al at the Zn/steel interface. This Al consumption suppressed abnormal Fe<sub>2</sub>Al<sub>5-x</sub>Zn<sub>x</sub> crystal growth, improving wettability at higher Al levels. Additionally, as Fe<sub>2</sub>Al<sub>5-x</sub>Zn<sub>x</sub> grew, it trapped residual oxides, further enhancing wettability. However, 1.0Si/Mn steel exhibited lower wettability due to a continuous oxide film that suppressed Fe dissolution, making Fe<sub>2</sub>Al<sub>5-x</sub>Zn<sub>x</sub> formation more difficult. These findings provide valuable insights for optimizing Al content in the Zn bath to improve the wettability of advanced high-strength steels.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115284"},"PeriodicalIF":4.8,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313231","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

Surface morphology, plastic deformation and phase transformation in single crystal superalloys under laser shock peening without coating 单晶高温合金无涂层激光冲击强化的表面形貌、塑性变形和相变

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-15 DOI: 10.1016/j.matchar.2025.115283

Shuang Hu , Mo Lang , Guangni Zhou , Huailin Zhang , Xiaoqing Liang , Sihai Luo , Weifeng He

{"title":"Surface morphology, plastic deformation and phase transformation in single crystal superalloys under laser shock peening without coating","authors":"Shuang Hu , Mo Lang , Guangni Zhou , Huailin Zhang , Xiaoqing Liang , Sihai Luo , Weifeng He","doi":"10.1016/j.matchar.2025.115283","DOIUrl":"10.1016/j.matchar.2025.115283","url":null,"abstract":"<div><div>Laser shock peening without coating (LSPwC) as a surface treatment has been demonstrated the ability to enhance the fatigue performance while maintaining the grain boundary-free nature of single crystal superalloys. The evolution of morphology and microstructure in the peened surface, however, still remains puzzled for the superalloys under varying technical parameters. This investigation explores the progression of surface topography, plastic deformation, phase transformation, as well as microhardness increment in the LSPwC affected layer. The laser pulses endue the target surface with a specific morphology and increase the roughness initially, while it diminishes gradually after multiple thermal-mechanical cycles. Experimental findings indicate that a stratified structure comprising a recast layer and a deformation layer is formed underneath the surface due to the thermal-mechanical effects during the peening process. The recast layer exhibiting an average depth of 1 μm, is composed of γ matrix and amorphous nano-particles rich in Al and O element, while these particles are capable of impeding dislocation glide in the subsequent peening. Additionally, the diffusion owing to high temperature and strain gradient causes elemental segregation and phase transformation of γ' → γ at the interface between the recast and the deformation layer. Accompanied by the severe plastic deformation, the crystalline orientation exhibits a noticeable local deviation across the slip bands in the deformed layer. Finally, as a result of γ' dissolution, nano-particles formation and dislocations multiplication, the LSPwC treated specimens exhibit a maximum hardness of approximately 600 HV at surface and a hardness gradient extending to around 350 μm at depth.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115283"},"PeriodicalIF":4.8,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322617","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

Notch tolerance of high-strength Cu-based nanocomposites 高强度cu基纳米复合材料的缺口容限

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-13 DOI: 10.1016/j.matchar.2025.115293

Rongmei Niu, Ke Han

{"title":"Notch tolerance of high-strength Cu-based nanocomposites","authors":"Rongmei Niu, Ke Han","doi":"10.1016/j.matchar.2025.115293","DOIUrl":"10.1016/j.matchar.2025.115293","url":null,"abstract":"<div><div>Understanding flaw tolerance in composites is critical for both the design and the application of reliable structural materials. Through uniaxial tension experiments, we explored notch-related plastic deformation mechanisms in both Cu-alumina and Cu-Ag-Zr composites via real-time strain mapping. Experiments demonstrated that, in samples under tensile loading with notch pairs from both materials, highly strained regions first emerged from notch tips and then developed into strain-concentration bands. Under further loading, each of these bands changed in shape from straight to elliptical as it formed a bridge across to its opposite notch tip. When any sample came under tension, its notch tip radius increased, and its strain-concentration bands gradually moved toward its notch segment center. High plastic strain became localized at the notch tips, of course, but also within the strain-concentration bands. Notch-strengthening, on the other hand, appeared mainly within the strain-concentration bands. The two composites showed different ductility within these bands. Alumina-particle-strengthened Cu had low elongation that eventually resulted in an abrupt fracture somewhere within these bands. By contrast, Ag-fiber-strengthened Cu-Ag-Zr nanocomposites had high elongation in strain-concentration bands, accompanied by clear notch blunting. In other words, Ag-fiber-strengthened Cu had higher flaw tolerance than alumina-particle-strengthened Cu, a difference we attributed to the differences between malleable fibers and hard particles.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115293"},"PeriodicalIF":4.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297296","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

Exceptional strength and ductility in 18Ni300/316 L heterogeneous bionic structures through laser additive manufacturing 激光增材制造18ni300 / 316l异质仿生结构的优异强度和延展性

IF 4.8 2区材料科学

Materials Characterization Pub Date : 2025-06-13 DOI: 10.1016/j.matchar.2025.115296

Xinge Zhang , Minglv Mao , Wenquan Wang , Jingwei Liang , Xudong Liang , Zhihui Zhang , Zhimin Liang

{"title":"Exceptional strength and ductility in 18Ni300/316 L heterogeneous bionic structures through laser additive manufacturing","authors":"Xinge Zhang , Minglv Mao , Wenquan Wang , Jingwei Liang , Xudong Liang , Zhihui Zhang , Zhimin Liang","doi":"10.1016/j.matchar.2025.115296","DOIUrl":"10.1016/j.matchar.2025.115296","url":null,"abstract":"<div><div>Compared to single-phase materials, heterogeneous structural materials exhibit significant potential in achieving an excellent combination of strength and ductility. To harness this potential, 18Ni300/316 L layered heterogeneous structural materials were fabricated through a controlled laser direct energy deposition strategy. Samples with a higher content of the relatively softer 316 L exhibited fracture elongation of up to 31.7 %. In contrast, samples with a higher content of the relatively harder 18Ni300 exhibited higher tensile strength, reaching 812 MPa, with only a slight reduction in ductility (28.5 %). The microstructure of the 18Ni300/316 L samples transformed from dendritic, equiaxed grains to columnar grains, consisting of martensite and austenite phases. The austenite grains extended from the 316 L region into the 18Ni300 region, exhibiting characteristics of epitaxial growth. During tensile testing, the “soft” (316 L layer) and “hard” (18Ni300 layer) regions at the interface underwent uneven deformation. The harder region induced normal stress, while the softer region induced back stress, leading to heterogeneous deformation-induced strengthening of the material. The novel implementation of the heterogeneous structure process may provide a new solution for overcoming the trade-off between strength and ductility.</div></div>","PeriodicalId":18727,"journal":{"name":"Materials Characterization","volume":"227 ","pages":"Article 115296"},"PeriodicalIF":4.8,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313230","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