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

Influence of hierarchical microstructure on mechanical properties in sintered CoCrFeMnNi high-entropy alloy fabricated by ultrasonic nanocrystalline surface modification

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-16 DOI: 10.1016/j.msea.2025.148218

Do Won Lee , Rae Eon Kim , Hyojeong Ha , Auezhan Amanov , Hyeong Seop Kim

引用次数: 0

Effect of niobium addition on the microstructure, transformation temperatures, and shape memory effect of Cu-Al-Ni-Ti shape memory alloys

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-15 DOI: 10.1016/j.msea.2025.148181

Arya Mohammadzadeh, Shahram Raygan

{"title":"Effect of niobium addition on the microstructure, transformation temperatures, and shape memory effect of Cu-Al-Ni-Ti shape memory alloys","authors":"Arya Mohammadzadeh, Shahram Raygan","doi":"10.1016/j.msea.2025.148181","DOIUrl":"10.1016/j.msea.2025.148181","url":null,"abstract":"<div><div>This research aims to study the effect of adding Nb element on the microstructure, transformation temperatures, mechanical properties, and shape memory effect of Cu-Al-Ni-Ti alloys prepared by the vacuum arc remelting method. Various analyses, such as optical microscopy, scanning electron microscopy, and transmission electron microscopy, were used to investigate the microstructure, the differential scanning calorimetry test to study the transformation temperatures, and X-ray diffraction to study the existing phases. The obtained results showed that by adding 0.5 (wt.%) Nb element to Cu-13Al-4Ni-0.7Ti (wt.%) alloy with martensitic structure at room temperature, the grain size decreased from 260 to 188 μm, and the failure stress and strain increased from 361 MPa and 6.4 % to 506 MPa and 7.9 %, respectively. Microscopic studies indicated the formation of Nb-rich second-phase particles next to Ti-rich phases in the alloy microstructure. The Cu-13Al-4Ni-0.7Ti-0.5Nb alloy (wt.%) exhibited transformation temperatures <span><math><mrow><msub><mi>M</mi><mi>s</mi></msub></mrow></math></span>, <span><math><mrow><msub><mi>M</mi><mi>f</mi></msub></mrow></math></span>, <span><math><mrow><msub><mi>A</mi><mi>s</mi></msub></mrow></math></span>, and <span><math><mrow><msub><mi>A</mi><mi>f</mi></msub></mrow></math></span> equal 110, 86, 131, and 163 °C, respectively. This alloy possesses a high potential for practical applications due to its 100 % recoverability with a pre-strain of 2 %.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148181"},"PeriodicalIF":6.1,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682991","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

Microstructure and mechanical properties of AlMo0.5NbTa0.5TiZr refractory high-entropy alloys fabricated by laser melting deposition

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-14 DOI: 10.1016/j.msea.2025.148213

Xinzhou Zhang , Zhiyuan Zheng , Bingbing Sun , Hui Han , Xiaoming Chen , Lan Chen

{"title":"Microstructure and mechanical properties of AlMo0.5NbTa0.5TiZr refractory high-entropy alloys fabricated by laser melting deposition","authors":"Xinzhou Zhang , Zhiyuan Zheng , Bingbing Sun , Hui Han , Xiaoming Chen , Lan Chen","doi":"10.1016/j.msea.2025.148213","DOIUrl":"10.1016/j.msea.2025.148213","url":null,"abstract":"<div><div>The low-density refractory high-entropy alloy AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr exhibits excellent high-temperature strength, high-temperature creep resistance, and high-temperature corrosion resistance, making it an ideal material for high-temperature structural applications. AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr was formed using electromagnetic induction heating-assisted laser melting deposition (LMD). The influence of laser process parameters on the dendritic morphology of AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr was analyzed for the first time, especially the effect of laser power on the diffusion behavior of elements. The mechanism of how elemental diffusion affects the microstructure and mechanical properties was also revealed. The results indicated that at higher laser power, coarse dendritic arms developed within the AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr specimens. The dendritic region was enriched with the high melting point Mo-Nb-Ta BCC-1 phase, while the inter-dendritic region was primarily enriched with the low melting point Al-Zr-Ti BCC-2 phase. The increase in laser power led to a significant rise in the Al-Zr enriched Al<sub>3</sub>Zr<sub>4</sub> phase. Compared to traditional vacuum arc melting method, AlMo<sub>0.5</sub>NbTa<sub>0.5</sub>TiZr formed by LMD exhibited a finer grain structure and superior mechanical properties. At a laser power of 1600 W, the average hardness and ultimate compressive strength of the LMD-formed AlMo<sub>0.5</sub>NbTa<sub>00.5</sub>TiZr specimens reached their maximum values, with the highest average hardness of 660 HV and the ultimate compressive strength of 2012 MPa. This study offers valuable insights into the application of LMD technology for processing novel low-density refractory high-entropy alloys, fostering the future development and application of innovative RHEAs in high-performance fields such as aerospace and energy.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148213"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683098","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

Heterogeneous microstructures of martensite and pearlite achieving excellent mechanical properties in high carbon chromium steel by multi-cycle flash heating treatment

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-14 DOI: 10.1016/j.msea.2025.148214

Changqing Shu , Shasha Zhang , Mengxin Yao , Peiheng Ding , Jicong Zhang , Xuewei Tao , Xiaolin Zhu , Shuaipeng Yu , Qiuhao Gu , Liukai Hua , Zhengjun Yao

{"title":"Heterogeneous microstructures of martensite and pearlite achieving excellent mechanical properties in high carbon chromium steel by multi-cycle flash heating treatment","authors":"Changqing Shu , Shasha Zhang , Mengxin Yao , Peiheng Ding , Jicong Zhang , Xuewei Tao , Xiaolin Zhu , Shuaipeng Yu , Qiuhao Gu , Liukai Hua , Zhengjun Yao","doi":"10.1016/j.msea.2025.148214","DOIUrl":"10.1016/j.msea.2025.148214","url":null,"abstract":"<div><div>Traditional homogeneous microstructures such as martensite, bainite, and pearlite struggle to balance strength and ductility in high carbon chromium steels. This study introduces a novel approach to achieving strength-ductility synergy by developing heterogeneous microstructures of martensite and pearlite during the continuous cooling transformation of supercooled austenite. By applying flash heating treatment, we achieved austenite chemical heterogenization and retained some undissolved carbides. We controlled the heating rate and the number of cycles to allow the pearlite volume fraction to vary between 24.8 % and 59.7 %. The samples subjected to multi-cycle flash heating exhibited fine grain sizes (1.08 μm) and higher dislocation densities, attaining a yield strength of 1294 MPa, an ultimate tensile strength of 1605 MPa and an elongation of 9.8 %. The enhanced mechanical properties were primarily attributed to dislocation hardening, grain refinement, and hetero-deformation-induced stress resulting from the coexistence of martensite and pearlite phases. This study provides a new strategy for optimizing the mechanical properties of high carbon chromium steels and provides valuable insights for advancing the development of other materials with excellent mechanical properties.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148214"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637129","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

Rapidly improving the mechanical properties of Al-Li alloy via electropulsing rapid heating

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-14 DOI: 10.1016/j.msea.2025.148212

Shengmeng Hui , Lihua Zhan , Yongqian Xu , Quanqing Zeng , Chang Zhou , Shiru Yu , Bolin Ma , Jingpeng Feng

{"title":"Rapidly improving the mechanical properties of Al-Li alloy via electropulsing rapid heating","authors":"Shengmeng Hui , Lihua Zhan , Yongqian Xu , Quanqing Zeng , Chang Zhou , Shiru Yu , Bolin Ma , Jingpeng Feng","doi":"10.1016/j.msea.2025.148212","DOIUrl":"10.1016/j.msea.2025.148212","url":null,"abstract":"<div><div>This study investigated the application of electropulsing pulse rapid heating (ERH) technology for the aging strengthening of Al-Li alloys, aiming to address the high energy consumption and low efficiency associated with traditional furnace heating (FH) methods. The experimental results demonstrated that ERH significantly reduced the time required to reach the target temperature, decreasing it from 2430 s to 155 s compared to conventional FH. A key finding was the identification of a current density threshold of 36 A/mm<sup>2</sup>, at which the yield strength of the Al-Li alloy increased rapidly, peaking at approximately 433 MPa within 483 s. Above this threshold, a decrease in the mechanical properties of the alloy was observed. ERH effectively promoted recrystallization and reduced texture intensity in the Al-Li alloys. However, excessive current density led to the formation of the <span><math><mrow><msup><mi>S</mi><mo>′</mo></msup></mrow></math></span> phase (<em>Al</em><sub><em>2</em></sub><em>CuMg</em>) at grain boundaries, which significantly reduced the mechanical properties of the alloy. Furthermore, excessive current density reduced the proportion of the <em>T</em><sub><em>1</em></sub> phase (<em>Al</em><sub><em>2</em></sub><em>CuLi</em>), which significantly degraded the mechanical properties of the alloy. Compared to FH, ERH reduces energy consumption by 22 times and heating time by 15.7 times. This study presented an energy-efficient processing method for enhancing the properties of high-strength aluminum alloys, particularly for aerospace applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148212"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683496","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

Thickness dependence of grain boundary strengthening effect on plasticity of submicrometer-to nanometer-thick freestanding copper thin films

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-14 DOI: 10.1016/j.msea.2025.148193

Toshiyuki Kondo , Shu Sadaki , Hiroyuki Wakaike , Kohji Minoshima

{"title":"Thickness dependence of grain boundary strengthening effect on plasticity of submicrometer-to nanometer-thick freestanding copper thin films","authors":"Toshiyuki Kondo , Shu Sadaki , Hiroyuki Wakaike , Kohji Minoshima","doi":"10.1016/j.msea.2025.148193","DOIUrl":"10.1016/j.msea.2025.148193","url":null,"abstract":"<div><div>The grain sizes of polycrystalline metallic thin films deposited by physical vapor deposition often correspond to the film thickness; i.e., thinner films tend to have smaller grains. This correlation between film thickness and grain size hinders a detailed understanding of the intrinsic (microstructure size) and extrinsic (sample dimension) size effects of the mechanical properties of metallic thin films. In this study, submicrometer-to nanometer-thick freestanding Cu films with independently controlled grain sizes and film thicknesses were fabricated to investigate the individual effects of grain size and film thickness on plasticity. Microtensile experiments were conducted on nearly pristine freestanding Cu thin film microspecimens cut out from large-area freestanding Cu thin films with thicknesses of ∼500, ∼100, and ∼40 nm with various grain sizes. The Cu films exhibited a thickness effect where the yield stress increased as the film thickness decreased when compared at similar grain sizes. By contrast, the effectiveness of grain boundary strengthening decreased as the film thickness decreased from ∼500 nm to ∼100 nm. Furthermore, grain boundary weakening occurred as the film thickness decreased to ∼40 nm. The results indicate a transition in the mechanical role of grain boundaries during plastic deformation, shifting from strengthening to weakening as film thickness decreases from the submicrometer to the nanometer range. The findings of this study enhance the understanding of intrinsic and extrinsic size effects on dislocation-mediated and grain boundary-mediated plasticity, providing valuable guidelines for improving the mechanical strength of submicro/nanoscale metallic materials.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148193"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683494","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

Anomalous temperature dependence of yield strength and deformation mechanisms in chemically complex intermetallic alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-14 DOI: 10.1016/j.msea.2025.148211

Jinxiong Hou , Jie Gan , Tao Wang , Junhua Luan , Tuanwei Zhang , Zhongkai Ren , Zhixiong Zhang , Wei Wen , Zhihua Wang , Wenwen Song , Tao Yang

{"title":"Anomalous temperature dependence of yield strength and deformation mechanisms in chemically complex intermetallic alloy","authors":"Jinxiong Hou , Jie Gan , Tao Wang , Junhua Luan , Tuanwei Zhang , Zhongkai Ren , Zhixiong Zhang , Wei Wen , Zhihua Wang , Wenwen Song , Tao Yang","doi":"10.1016/j.msea.2025.148211","DOIUrl":"10.1016/j.msea.2025.148211","url":null,"abstract":"<div><div>An ordered L1<sub>2</sub> structure-dominated chemically complex intermetallic alloy (CCIMA) was developed based on a Ni-Co-Cr-Al-Mo-Ti-Ta-Nb-B system. Its phase structure, mechanical behaviors, and underlying deformation mechanisms were investigated systematically at room and elevated temperatures. The CCIMA yields at a strength of 758 ± 2 MPa at room temperature, maintaining a pronounced work-hardening rate of ∼4530 ± 10 MPa throughout the entire deformation, which achieves an ultimate strength of ∼1490 ± 12 MPa attributing to the formation of anti-phase boundary (APB) together with superlattice intrinsic stacking fault (SISF). A remarkable temperature-dependent anomaly in yield strength is formed at temperatures below about 800 °C, obtaining an increment of strength for nearly 200 MPa relative to that at 20 °C. Such yield strength anomaly (YSA) is caused by the pining of Kear-Wilsdorf (K-W) locks, resulting from thermally-activated superlattice dislocations from the (111) octahedral to (010) cube plane. Furthermore, a transition of dissociation scheme from APB-type at intermediate temperatures to SISF-type at 900 °C is believed to be responsible for the absence of YSA at higher temperatures. A high peak of flow stress towards 800 °C is formed in the CCIMA, signifying a great potential for elevated temperature applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148211"},"PeriodicalIF":6.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637130","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

Fracture toughness of laser-based powder bed fusion produced Ti-6Al-4V

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-13 DOI: 10.1016/j.msea.2025.148199

D.F. Louw , M. Neaves , C. McDuling , T.H. Becker

{"title":"Fracture toughness of laser-based powder bed fusion produced Ti-6Al-4V","authors":"D.F. Louw , M. Neaves , C. McDuling , T.H. Becker","doi":"10.1016/j.msea.2025.148199","DOIUrl":"10.1016/j.msea.2025.148199","url":null,"abstract":"<div><div>The rapid solidification and cooling rates, directional cooling, and the line-by-line, layer-by-layer consolidation inherent in laser-based powder bed fusion (LPBF) create unique microstructures, often leading to high strength but limited ductility and toughness. In load-bearing applications, where strength and toughness are critical, fracture toughness is a fundamental property and is pivotal in structural design. This study examines the relationship between these unique microstructural features, the LPBF process, post-processing heat treatments, and the fracture toughness of Ti-6Al-4V. First, elongated prior-β grains induce anisotropy in fracture toughness, which can be altered by heat treatment above the β-transus temperature. Second, a below β-transus temperature heat treatment that coarsens α laths improves fracture toughness due to a combination of lower yield strength and increased ductility. This increased ductility is attributed to a reduced strength difference between larger primary and smaller secondary and tertiary laths. Third, anisotropy in the rising J-R curve behaviour is linked to a dominant ∼45° lath orientation relative to the dominant ⟨001⟩ prior-β grain texture aligned with the build direction (Z-axis). Notably, a fracture toughness of 90 MPa <span><math><mrow><msqrt><mi>m</mi></msqrt></mrow></math></span>, yield strength of 964 MPa, ultimate tensile strength of 1010 MPa, and 18 % elongation after the break is achieved, which compare favourably with the properties of the wrought counterpart.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148199"},"PeriodicalIF":6.1,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643533","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

Prediction of multiaxial deformation of 316H stainless steel at high temperature using a multiscale crystal plasticity approach

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-13 DOI: 10.1016/j.msea.2025.148160

Christopher Allen , Harry Coules , Christopher E. Truman , Mehdi Mokhtarishirazabad , Simon McKendrey , Amelia Billings , Chen Liu , Catrin M. Davies , Joe Kelleher

{"title":"Prediction of multiaxial deformation of 316H stainless steel at high temperature using a multiscale crystal plasticity approach","authors":"Christopher Allen , Harry Coules , Christopher E. Truman , Mehdi Mokhtarishirazabad , Simon McKendrey , Amelia Billings , Chen Liu , Catrin M. Davies , Joe Kelleher","doi":"10.1016/j.msea.2025.148160","DOIUrl":"10.1016/j.msea.2025.148160","url":null,"abstract":"<div><div>Steel components in advanced gas-cooled reactors (AGRs) are subject to multiaxial deformation at high temperatures. Neutron diffraction has been used to study the {111}, {200}, {220} and {311} grain family, also known as lattice plane, response during <em>in-situ</em> loading and relaxation of notched bars of 316H stainless steel at 550 °C. These experimental conditions have been modelled using a multiscale approach that employs finite element models at the continuum, component, scale as boundary conditions for a crystal plasticity finite element model. For the bar with the highest triaxiality factor at the diffracting region, the CPFE model was in good agreement with the experiment results. The most notable difference was the reduced accumulation of intergranular strain in the {200} grain family and significant stiffness difference in the {220} grain family in the transverse direction. For the bar with the lowest triaxiality factor at the diffraction region, the agreement between the CPFE model and experiment was acceptable but poorer than the bar with the higher triaxiality factor. This is due to the CPFE sensitivity to the macroscopic boundary conditions applied. Reasonable agreement was achieved for the relaxation dwells. The modelling has shown that multiaxial conditions, enforced by the multiscale approach, cause an increase in stiffness in the CPFE response, resulting in the reduction in the intergranular strain accumulated.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148160"},"PeriodicalIF":6.1,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637125","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

Improving resistance to softening and strength of Cu-Fe-Mg-P alloy through inhibition of α-Fe phase growth

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-13 DOI: 10.1016/j.msea.2025.148210

Chengzhi Huang , Yangfan Liu , Zekun Liao , Meng Wang , Yanbin Jiang , Shen Gong , Zhu Xiao , Yanlin Jia , Jianing Zhang , Zhou Li

{"title":"Improving resistance to softening and strength of Cu-Fe-Mg-P alloy through inhibition of α-Fe phase growth","authors":"Chengzhi Huang , Yangfan Liu , Zekun Liao , Meng Wang , Yanbin Jiang , Shen Gong , Zhu Xiao , Yanlin Jia , Jianing Zhang , Zhou Li","doi":"10.1016/j.msea.2025.148210","DOIUrl":"10.1016/j.msea.2025.148210","url":null,"abstract":"<div><div>In this study, a Cu-2.3Fe-0.1Mg-0.03P alloy was developed, and the influences of Mg element on the microstructure and mechanical properties of the alloy were investigated. The Cu-2.3Fe-0.1Mg-0.03P alloy exhibited a softening temperature of 580 °C, a tensile strength of 506 MPa at room temperature and an electrical conductivity of 66.8 % IACS, which were higher than those of the Cu-2.3Fe-0.15Zn-0.03P (C19400), and the softening temperature was increased by ∼ 100 °C. Through transmission electron microscopy (TEM) observations, combined with first-principles calculations and kinetic analyses, it was shown that the addition of Mg element reduced the solubility of Fe in the Cu matrix, thereby promoting the precipitation of Fe atoms, which enhanced the electrical conductivity of the alloy and increased the quantity of α-Fe phases. Furthermore, the incorporation of Mg element diminished the diffusion coefficient of Fe atom within the Cu matrix, consequently reducing the growth rate of α-Fe phase during aging. These two factors collectively enabled the α-Fe phases to maintain a finer, more dispersed distribution at elevated temperature, thereby impeding the recrystallization behavior of the alloy at high temperature, which primarily contributed to enhancements of both resistance to softening and strength of the Cu-Fe-Mg-P alloy.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"931 ","pages":"Article 148210"},"PeriodicalIF":6.1,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637126","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