Acta Metallurgica Sinica-English Letters最新文献

Effect of K2HPO4 Concentration on the Formation, Structure, Composition and Protectiveness of Conversion Coating Deposited on AZ31 Magnesium Alloy

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-22 DOI: 10.1007/s40195-025-01815-3

Liping Wu, Junhua Dong, Xianfei Zheng, Zhongying Wang, Xiaoying Sun, Xiuling Shang, Wei Ke, Changgang Wang

{"title":"Effect of K2HPO4 Concentration on the Formation, Structure, Composition and Protectiveness of Conversion Coating Deposited on AZ31 Magnesium Alloy","authors":"Liping Wu, Junhua Dong, Xianfei Zheng, Zhongying Wang, Xiaoying Sun, Xiuling Shang, Wei Ke, Changgang Wang","doi":"10.1007/s40195-025-01815-3","DOIUrl":"10.1007/s40195-025-01815-3","url":null,"abstract":"<div>In deaerated 0.05 M, 0.1 M, 0.2 M and 0.5 M K2HPO4 solutions with pH 9.5, AZ31 magnesium (Mg) alloy was subjected to potentiostatic polarization at − 0.8 VSCE to deposit a phosphate conversion coating. The morphology, structure, chemical composition, and protective performance of the conversion coating during the formation process were characterized. The results showed that amorphous Mg(OH)2 and MgHPO4 and crystallized KMgPO4·6H2O (struvite–K) were successively deposited on the surface of AZ31 Mg alloy in the four solutions. MgHPO4 was converted from Mg(OH)2, while struvite–K was transformed from MgHPO4. The distribution of Mg(OH)2, MgHPO4 and struvite–K along the thickness of the coating differs with K2HPO4 concentration. As the concentration of K2HPO4 increased, the coating time was gradually shortened, and the coating was gradually thinned. Meanwhile, the ratio of the nucleation rate to the growth rate of struvite–K crystal nuclei increased, resulting in a decrease in the size of struvite–K crystal. When the concentration of K2HPO4 increased from 0.05 to 0.1 M, the content of struvite–K increased, and the protective performance of the coating was enhanced. However, as the concentration of K2HPO4 continued to increase to 0.5 M, the content of struvite–K and the protective performance of the coating decreased.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"481 - 496"},"PeriodicalIF":2.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521669","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

In Vitro Corrosion Behavior and Mechanical Property of Novel Mg–Sn–In–Ga Alloys for Orthopedic Applications

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-16 DOI: 10.1007/s40195-024-01800-2

Jing Wang, Xuejian Wang, Zongning Chen, Huijun Kang, Tongmin Wang, Enyu Guo

{"title":"In Vitro Corrosion Behavior and Mechanical Property of Novel Mg–Sn–In–Ga Alloys for Orthopedic Applications","authors":"Jing Wang, Xuejian Wang, Zongning Chen, Huijun Kang, Tongmin Wang, Enyu Guo","doi":"10.1007/s40195-024-01800-2","DOIUrl":"10.1007/s40195-024-01800-2","url":null,"abstract":"<div>This study develops novel Mg–Sn–In–Ga alloys as potential implant materials for orthopedic applications. The corrosion behavior of the Mg–Sn–In–Ga alloys was studied through mass loss measurements, hydrogen evolution measurements, electrochemical analysis, and corrosion morphology observations. The results show that the corrosion rate of the Mg–1Sn–1In–1Ga alloy was only 0.10 ± 0.003 mm/y after immersion in Hank’s solution for 15 days. This outstanding corrosion resistance was associated with the protective effect of the corrosion products. The increase in the Sn and Ga element content led to the precipitation of a large amount of Mg2Sn and Mg5Ga2, which had a dominant effect on the corrosion rate in the Mg–5Sn–1In–2Ga alloy. These precipitates increased the current density and detached from the alloy surface during the corrosion process. This can lead to a weakened protective effect of the corrosion layer, and thus generate localized corrosion and an increase in the corrosion rate. The strength of the Mg–5Sn–1In–2Ga alloy was enhanced due to fine-grain strengthening and precipitation strengthening. The ultimate tensile strength and yield strength of the Mg–5Sn–1In–2Ga alloy were ~ 309 MPa and ~ 253 MPa, respectively.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"353 - 366"},"PeriodicalIF":2.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521700","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

Copper Precipitation Behavior and Mechanical Properties of Cu-Bearing Ferritic Stainless Steel with Different Cr Addition

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-15 DOI: 10.1007/s40195-025-01814-4

Yifan Li, Shengyao Ma, Xinrui Zhang, Tong Xi, Chunguang Yang, Hanyu Zhao, Ke Yang

{"title":"Copper Precipitation Behavior and Mechanical Properties of Cu-Bearing Ferritic Stainless Steel with Different Cr Addition","authors":"Yifan Li, Shengyao Ma, Xinrui Zhang, Tong Xi, Chunguang Yang, Hanyu Zhao, Ke Yang","doi":"10.1007/s40195-025-01814-4","DOIUrl":"10.1007/s40195-025-01814-4","url":null,"abstract":"<div>The microstructure evolution and mechanical properties of Cu-bearing ferritic stainless steel with different Cr addition (Cr = 12, 15 and 17 wt%) were investigated. The phase transformation behavior under different cooling rate, Cu-rich precipitation behavior and its influence on the mechanical properties under different aging treatment are systematically characterized using dilatometry, differential scanning calorimeter (DSC) and transmission electron microscopy (TEM). The results indicated that the increase in Cr content narrowed the austenite phase region at high temperatures, affecting its microstructure under different cooling rates. The 12Cr-1.5Cu steel exhibited a fully austenitic phase region at high temperature and occurred apparent martensitic transformation after air cooling. Cooling rate significantly influenced the phase transition of the steels, and subsequently affected its mechanical properties. All three investigated steels showed higher strength and lower plasticity in air cooling condition compared to furnace cooling condition, due to the presence of martensite. After aging treatment, high number densities of Cu-rich precipitates were formed in steel matrix and the size of Cu-rich precipitates increased obviously with increasing aging temperature, while the tendency for number density was opposite. Fine and dispersed Cu-rich precipitates formed during low-temperature aging enhanced strength of the steels, while larger Cu-rich phases developed during high-temperature aging endowed greater ductility to the steels. Notably, the Cr content had no significant effect on the precipitation behavior of Cu-rich precipitation. These comprehensive results and analyses could provide a solid foundation for broader applications of Cu-bearing ferritic stainless steels.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"383 - 395"},"PeriodicalIF":2.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521699","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 Novel BCC/B2 Structural Nb38Ti35Al15V6Cr4(TaHfMoW)2 Refractory High-Entropy Alloy with Excellent Specific Yield Strength-Plasticity Synergy

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-13 DOI: 10.1007/s40195-024-01805-x

Hongbin Liu, Zhenqiang Xing, Yitong Yang, Jingyu Pang, Wen Li, Zhengwang Zhu, Long Zhang, Aimin Wang, Haifeng Zhang, Hongwei Zhang

{"title":"A Novel BCC/B2 Structural Nb38Ti35Al15V6Cr4(TaHfMoW)2 Refractory High-Entropy Alloy with Excellent Specific Yield Strength-Plasticity Synergy","authors":"Hongbin Liu, Zhenqiang Xing, Yitong Yang, Jingyu Pang, Wen Li, Zhengwang Zhu, Long Zhang, Aimin Wang, Haifeng Zhang, Hongwei Zhang","doi":"10.1007/s40195-024-01805-x","DOIUrl":"10.1007/s40195-024-01805-x","url":null,"abstract":"<div>Refractory high-entropy alloys (RHEAs) stand as promising candidates for the development of a new generation of high-temperature materials due to their exceptional mechanical properties. However, the inherent low ductility and high density of RHEAs have hindered their widespread adoption in industrial applications. In this study, an Nb38Ti35Al15V6Cr4(TaHfMoW)2 RHEA with a BCC/B2 dual-phase structure is successfully developed. The RHEA exhibits excellent specific yield strength of 162.4 MPa·g−1·cm3 and 84.3 MPa·g−1·cm3 at room temperature (RT) and 800 °C, respectively. It was found that the pinning effect of the B2 phase induces a gradual transition in dislocation slip mode from planar slip to cross slip, homogenizing the plastic flow and resulting in excellent compression plasticity (ε > 50%). Additionally, the B2 phase endows the alloy with excellent yield strength at high temperatures by precipitation strengthening. Moreover, the dominated a/2 < 111 > type dislocation contributes to the alloy's superior plasticity at high temperatures.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"396 - 406"},"PeriodicalIF":2.9,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521682","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

Roles of Y2Zr2O7 Nano-Oxides in Helium Management in ODS Ferritic Alloys: A First-Principles Study

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-13 DOI: 10.1007/s40195-024-01813-x

Huajian Wu, Jieli Ma, Yong Jiang, Yiren Wang, Fuhua Cao

{"title":"Roles of Y2Zr2O7 Nano-Oxides in Helium Management in ODS Ferritic Alloys: A First-Principles Study","authors":"Huajian Wu, Jieli Ma, Yong Jiang, Yiren Wang, Fuhua Cao","doi":"10.1007/s40195-024-01813-x","DOIUrl":"10.1007/s40195-024-01813-x","url":null,"abstract":"<div>Y–Zr–O nano-oxide dispersion-strengthened (ODS) ferritic alloys have attracted increasing research efforts in recent years, for the enhanced nucleation and refinement of nano-oxides. Here, we report a first-principles exploration on the possible roles of Y2Zr2O7 in helium management in Y + Zr and Y + Ti + Zr co-alloyed ODS ferritic alloys. Bulk phase calculations suggested that similarly as Y2Ti2O7, Y2Zr2O7 has a comparably strong capability for trapping helium at its interstitial sites. The equilibrium Fe/Y2Zr2O7 interface structure was further predicted as the top-coordinated O-rich at the temperature range of interest. Vacancy and helium both segregate to the Y2Zr2O7 interface, in preference to the Y2Ti2O7 interface, the bulk interior of Y2Zr2O7 and the grain boundaries. In this regard, Y2Zr2O7 can be more effective than Y2Ti2O7 in preventing vacancies and helium from reaching GBs. Based on these results, the profound implications for the helium tolerance of Zr-alloyed ODS ferritic alloys were discussed.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"497 - 506"},"PeriodicalIF":2.9,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521683","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

Correction: Microstructure, Texture, Mechanical Properties, and Corrosion Behavior of Biodegradable Zn-0.2 Mg Alloy Processed by Multi-Directional Forging

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-09 DOI: 10.1007/s40195-024-01801-1

Nafiseh Mollaei, Seyed Mahmood Fatemi, Mohammad Reza Aboutalebi, Seyed Hossein Razavi, Wiktor Bednarczyk

引用次数: 0

Mechanical Properties and Corrosion Behavior of Porous Zn Alloy as Biodegradable Materials

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-09 DOI: 10.1007/s40195-024-01808-8

Xiaotong Lu, Pingyun Yuan, Zhengquan Wang, Xiaocheng Li, Hanyuan Liu, Wenhao Zhou, Kun Sun, Yongliang Mu

{"title":"Mechanical Properties and Corrosion Behavior of Porous Zn Alloy as Biodegradable Materials","authors":"Xiaotong Lu, Pingyun Yuan, Zhengquan Wang, Xiaocheng Li, Hanyuan Liu, Wenhao Zhou, Kun Sun, Yongliang Mu","doi":"10.1007/s40195-024-01808-8","DOIUrl":"10.1007/s40195-024-01808-8","url":null,"abstract":"<div>The complex stresses experienced by medical-grade porous metals in the physiological environment following implantation as bone repair materials necessitate a comprehensive understanding of their mechanical behavior. This paper investigates the effects of pore structure and matrix composition on the corrosion behavior and mechanical properties of pure Zn. Porous Zn alloys with varying pore sizes were prepared via vacuum infiltration casting. The results showed that addition of Mg elements and an increase in pore size were observed to enhance the strength and elastic modulus of the porous Zn alloy (41.34 ± 0.113 MPa and 0.58 ± 0.02 GPa of the C-Z3AM). However, corrosion tests indicated that specimens with smaller pores and the addition of Mg elements exhibited accelerated corrosion of porous Zn alloys in Hank’s solution. Electrochemical test results show the corrosion resistance rank in order of C-Z5A > C-Z3AM > N-Z5A > N-Z3AM. Additionally, the mechanical retention of porous Zn alloys in simulated body fluids was found to be significantly reduced by the incorporation of Mg elements and smaller pore sizes, the yield strength declines rates of C-Z5A, C-Z3AM and N-Z3AM after 30 days of immersion were 16.7%, 63.7% and 78.2%, respectively. The objective is to establish the role of the material-structure-corrosion-mechanics relationship, which can provide a theoretical and experimental basis for the design and evaluation of Zn and its alloy implanted devices.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"367 - 382"},"PeriodicalIF":2.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521653","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 Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-05 DOI: 10.1007/s40195-024-01807-9

Yiyun Guo, Lei Wu, Yibo Shang, Chengqi Sun

{"title":"Effects of Defect, Mean Stress and Lower Loading on High Cycle and Very High Cycle Fatigue Behavior of Ti-6Al-4V Alloy","authors":"Yiyun Guo, Lei Wu, Yibo Shang, Chengqi Sun","doi":"10.1007/s40195-024-01807-9","DOIUrl":"10.1007/s40195-024-01807-9","url":null,"abstract":"<div>In this study, the effects of defect, mean stress and lower loading are investigated for high cycle (HCF) and very high cycle fatigue (VHCF) behavior of Ti-6Al-4V alloy. It indicates that the S–N curve of Ti-6Al-4V alloy exhibits a linear decreasing trend or a plateau characteristic in HCF and VHCF regimes, which depends on the defect size and stress ratio. VHCF strength decreases with increasing the defect size, and it is irrespective of stress ratios. The fatigue crack initiates from specimen surface at R = −1 in both HCF and VHCF regimes. While the fatigue crack initiates from the subsurface or the interior of the specimen at R = 0.1 in VHCF regime. A sequence of lower stress amplitude below the fatigue strength at 109 cyc has no or negligible influence on the fatigue life of 105–109 cyc. The lower stress amplitude in variable amplitude loadings does not affect the failure mechanism. The residual compressive stress relaxation is not observed after a large number of lower loadings under ultrasonic frequency fatigue test. Gerber formula and Goodman formula give dangerous predictions of VHCF strength for both smooth specimens and specimens with defects.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"435 - 448"},"PeriodicalIF":2.9,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521778","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

Enhancing the Corrosion Resistance of FeNiCoCrW0.2Al0.1 High-Entropy Alloy in 3.5 wt% NaCl Solution by Bilayer Passivation

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-04 DOI: 10.1007/s40195-024-01804-y

Jingxiang Xu, Yuyan Yang, Ruiyang Huang, Xinwei Yuan, Huakang Bian, Zhenhua Chu, Yang Wang, Yanhua Lei

{"title":"Enhancing the Corrosion Resistance of FeNiCoCrW0.2Al0.1 High-Entropy Alloy in 3.5 wt% NaCl Solution by Bilayer Passivation","authors":"Jingxiang Xu, Yuyan Yang, Ruiyang Huang, Xinwei Yuan, Huakang Bian, Zhenhua Chu, Yang Wang, Yanhua Lei","doi":"10.1007/s40195-024-01804-y","DOIUrl":"10.1007/s40195-024-01804-y","url":null,"abstract":"<div>The strong corrosion resistance and corrosion behavior of the FeNiCoCrW0.2Al0.1 high-entropy alloy in 3.5 wt% NaCl solution was investigated. In order to explain the Cl− induced degradation of different metal oxides on the surface of the passivate film, the energy required for the interaction of the corrosion oxidation products NiO, CoO, Fe2O3, and Cr2O3 surfaces with Cl− is compared and calculated based on the assumptions of the point defect model and the density functional theory by using the electrochemical impedance spectroscopy and the X-ray photoelectron spectroscopy for the analysis of the mono-double-layer structure and elemental compositions of passivate film in the corrosion process. The combined experimental and simulation results showed that the alloy passivates naturally in air, forming a single passivation layer. The compositional layering of the passivation film in 3.5 wt% NaCl solution occurred with the increase of the contact time with NaCl. A double-layer passivation with a two-layered combinatorial structure was formed due to the imbalanced depletion of Co and Fe during corrosion, and that the dense outer structure of this high-entropy alloy, which was made up of NiO and Cr2O3, provided the predominantly high corrosion resistance. This paper provided a new perspective to study the strong corrosion resistance of FeNiCoCr-based high-entropy alloys.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 3","pages":"407 - 418"},"PeriodicalIF":2.9,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521747","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

Achieving Ultrahigh Strength in Mg–1.2Y–1.2Ni (at.%) Alloy via Tailoring Extrusion Rate 通过调整挤压速率实现 Mg-1.2Y-1.2Ni (at.%) 合金的超高强度

IF 2.9 2区材料科学

Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-03 DOI: 10.1007/s40195-024-01806-w

Xiaoqing Liu, Xianke Zhang, Jinwei Gao, Xiurong Zhu, Lei Xiao, Zhengchi Yang, Lijun Tan, Chubin Yang, Biao Wu, Huixin Chen, Jiayu Huang

{"title":"Achieving Ultrahigh Strength in Mg–1.2Y–1.2Ni (at.%) Alloy via Tailoring Extrusion Rate","authors":"Xiaoqing Liu, Xianke Zhang, Jinwei Gao, Xiurong Zhu, Lei Xiao, Zhengchi Yang, Lijun Tan, Chubin Yang, Biao Wu, Huixin Chen, Jiayu Huang","doi":"10.1007/s40195-024-01806-w","DOIUrl":"10.1007/s40195-024-01806-w","url":null,"abstract":"<div>Mg–1.2Y–1.2Ni (at.%) alloy was extruded at 400 °C with an extrusion ratio of 16:1 and different rates from 1 to 6 mm/s. The effect of extrusion rate on microstructure and mechanical properties of the Mg–1.2Y–1.2Ni alloy was systematically investigated. With the increase of extrusion rate, the average recrystallized grain size of Mg–1.2Y–1.2Ni alloy and mean particle diameter of Mg2Ni phase were increased, while the density of geometrically necessary dislocation and the intensity of the basal texture were decreased. When extrusion rate increases from 1 to 6 mm/s, the tensile yield strength (TYS) of as-extruded Mg–1.2Y–1.2Ni alloy decreases from 501 to 281 MPa, while the elongation to failure increases from 1.5% to 6.2%. The Mg–1.2Y–1.2Ni alloy extruded at 3 mm/s obtained TYS of 421 MPa, the ultimate tensile strength (UTS) of 440 MPa and elongation to failure of 2.6%, respectively, exhibiting comprehensive mechanical properties with relatively good plasticity and ultrahigh strength. The ultrahigh TYS of 501 and 421 MPa was mainly due to the strengthening from ultrafine recrystallized grains, high volume fraction long period stacking ordered (LPSO) phases and high density dislocations.</div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"38 2","pages":"299 - 312"},"PeriodicalIF":2.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361750","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