Acta Metallurgica Sinica-English Letters最新文献

{"title":"Thermal Stability and Strengthening Effect of Coherent Precipitates in a (FeCoNi)92Al2.5Ti5.5 High Entropy Alloy","authors":"Yuqi Liu,&nbsp;Feng Wang,&nbsp;Songyang Chen,&nbsp;Hui Wang,&nbsp;Zhiping Xiong,&nbsp;Khurram Yaqoob,&nbsp;Zhangwei Wang,&nbsp;Min Song","doi":"10.1007/s40195-024-01727-8","DOIUrl":"10.1007/s40195-024-01727-8","url":null,"abstract":"<div><p>The coarsening behavior and strengthening effect of L1₂-Ni₃(Ti,Al) precipitates in a face-centered-cubic (FCC) (FeCoNi)₉₂Al_2.5Ti_5.5 high entropy alloy have been systematically investigated. The coherent L1₂ precipitates, uniformly distributed throughout the FCC matrix, consistently retain a spherical shape. The coarsening rate coefficient of precipitate is determined by employing the Philippe-Voorhees (PV) model, suggesting excellent thermal stability. Furthermore, the elemental partitioning and compositional evolution of the L1₂ precipitates is analyzed by atom probe tomography, which identify aluminum (Al) as the slowest diffusion species during the coarsening process. In addition, the precipitation strengthening effect is quantified to ascertain the optimal size of the precipitates. Our study enhances the understanding of precipitate coarsening in high entropy alloys, presenting valuable insights into their thermal stability and mechanical properties.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1491 - 1500"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141526050","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}

{"title":"Fatigue and Corrosion Fatigue Properties of Mg–Zn–Zr–Nd Alloys in Glucose-Containing Simulated Body Fluids","authors":"Xue Han,&nbsp;Dan Zhang,&nbsp;Song Zhang,&nbsp;Mohammed R. I. Abueida,&nbsp;Lili Tan,&nbsp;Xiaopeng Lu,&nbsp;Qiang Wang,&nbsp;Huanye Liu","doi":"10.1007/s40195-024-01730-z","DOIUrl":"10.1007/s40195-024-01730-z","url":null,"abstract":"<div><p>Medical bone implant magnesium (Mg) alloys are subjected to both corrosive environments and complex loads in the human body. The increasing number of hyperglycemic and diabetic patients in recent years has brought new challenges to the fatigue performance of Mg alloys. Therefore, it is significant to study the corrosion fatigue (CF) behavior of medical Mg alloys in glucose-containing simulated body fluids for their clinical applications. Herein, the corrosion and fatigue properties of extruded Mg-Zn-Zr-Nd alloy in Hank’s balanced salt solution (HBSS) containing different concentrations (1 g/L and 3 g/L) of glucose were investigated. The average grain size of the alloy is about 5 μm, which provides excellent overall mechanical properties. The conditional fatigue strength of the alloy was 127 MPa in air and 88 MPa and 70 MPa in HBSS containing 1 g/L glucose and 3 g/L glucose, respectively. Fatigue crack initiation points for alloys in air are oxide inclusions and in solution are corrosion pits. The corrosion rate of the alloy is high at the beginning, and decreases as the surface corrosion product layer thickens with the increase of immersion time. The corrosion products of the alloy are mainly Mg(OH)₂, MgO and a small amount of Ca-P compounds. The electrochemical results indicated that the corrosion rate of the alloys gradually decreased with increasing immersion time, but the corrosion tendency of the alloy was greater in HBSS containing 3 g/L glucose. On the one hand, glucose accelerates the corrosion process by adsorbing large amounts of aggressive Cl⁻ ions. On the other hand, glucose will be oxidized to form gluconic acid, and then reacts with Mg(OH)₂ and MgO to form Mg gluconate, which destroys the corrosion product film and leads to the aggravation of corrosion and the accumulation of fatigue damage.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1533 - 1550"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502104","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}

{"title":"Effects of Reinforcement Content and Homogenization Treatment on the Microstructure and Mechanical Properties of in-situ TiB2/2219Al Composites","authors":"Linwei Li,&nbsp;Donghu Zhou,&nbsp;Kai Zhao,&nbsp;Lifeng Jiang,&nbsp;Huijun Kang,&nbsp;Enyu Guo,&nbsp;Feng Mao,&nbsp;Zongning Chen,&nbsp;Tongmin Wang","doi":"10.1007/s40195-024-01695-z","DOIUrl":"10.1007/s40195-024-01695-z","url":null,"abstract":"<div><p>Obtaining an appropriate grain size is crucial for Al alloys or Al matrix composites prior to processing, as it significantly influences the mechanical properties of components and workability during the manufacturing process. TiB₂ particles are exceptional grain refiners in Al and serve as excellent reinforcement particles for particulate-reinforced aluminum matrix composites. However, the optimal particle content for achieving excellent refinement and strengthening effects depends on the matrix composition and requires further investigation. Additionally, homogenization is essential for mitigating the element segregation in the ingot. Although it is anticipated that adding suitable particles can effectively inhibit undesired grain growth during homogenization, comprehensive investigations on this aspect are currently lacking. Therefore, TiB₂/2219Al matrix composites with varying reinforcement contents (0, 1, 3, 5 wt%) were fabricated through traditional casting followed by homogenization treatment to address these research gaps. The effects of reinforcement content and homogenization treatment on the microstructure and mechanical properties of <i>in-situ</i> TiB₂/2219Al composites were investigated. The results demonstrate a gradual strengthening of the refining effect with increasing particle concentration. Moreover, composites containing 3 wt% TiB₂ particles exhibit superior comprehensive mechanical properties in both as-cast and homogenized state. Additionally, potential orientation relationships are observed and calculated between undissolved Al₂Cu eutectic phase and submicron or nanometer-sized TiB₂ particles, resulting in a mixture structure with enhanced bonding strength. This mixture structure is continuously distributed along grain boundaries during solidification, forming a three-dimensional cellular network that acts as primary retarding forces for grain growth during homogenization. Furthermore, the established homogenization kinetic equations were further utilized to analyze the correlation between homogenization time and grain size, as well as the influence of homogenization temperature.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 8","pages":"1421 - 1437"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502105","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}

{"title":"A Novel Multiphase Stainless Steel with Ultra-Low Yield Ratio and High Ductility","authors":"Menghao Liu,&nbsp;Cuiwei Du,&nbsp;Yuewu Li,&nbsp;Xiaogang Li","doi":"10.1007/s40195-024-01733-w","DOIUrl":"10.1007/s40195-024-01733-w","url":null,"abstract":"<div><p>This study focuses on developing a novel multiphase stainless steel with enhanced ductility and an ultralow yield ratio achieved through solid-solution treatment. The steel exhibits remarkable mechanical properties: a tensile strength of approximately 1114 MPa, an ultralow yield ratio of 0.36, exceptional uniform elongation of approximately 17.48%, and total elongation of approximately 21.73%. The remarkable ductility of the steel can be attributed to the transformation-induced plasticity (TRIP) effect observed in the retained austenite, while its exceptional strength results from the combined effects of TRIP and the martensite phase.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1777 - 1784"},"PeriodicalIF":2.9,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141525843","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}

{"title":"3D Graphene Nanosheets Crosslinked Core–Shell FeS2@N, S Co-Doped Porous Carbon for Improved Lithium/Sodium Storage Performance","authors":"Liang Chen,&nbsp;Lan-Yun Yang,&nbsp;Li-Ying Hu,&nbsp;Xu Liu,&nbsp;Chen-Xi Xu,&nbsp;Ying Liu,&nbsp;Wei Wang,&nbsp;Wen-Yuan Xu,&nbsp;Zhao-Hui Hou","doi":"10.1007/s40195-024-01735-8","DOIUrl":"10.1007/s40195-024-01735-8","url":null,"abstract":"<div><p>Transition metal sulfides (TMS) hold great promise as anode materials for Li⁺/Na⁺ storage. However, their practical application still faces several challenges, such as inadequate electrical conductivity, substantial volume changes and a propensity for agglomeration. To tackle these challenges, a 3D composite structure composed of graphene nanosheets crosslinked core−shell FeS₂@N, S co−doped porous carbon (FeS₂@NSC/GNs) is created by combining self−template polymerization with the graphene encapsulation technique. Systematic characterization and analysis demonstrate the effectiveness of the self−template polymerization strategy in generating a porous core−shell structure, which facilitates the uniform dispersion and optimal contact of the FeS₂ core within the carbon shell. Concurrently, the integration of graphene, alongside the porous carbon shell, introduces a sophisticated dual−protection mechanism against volume expansion and undesirable FeS₂ aggregation. Furthermore, the resulting 3D architecture enables efficient electron/ion transport and provides abundant sites for Li⁺/Na⁺ storage. Leveraging these inherent benefits, the FeS₂@NSC/GNs composite exhibits significantly improved lithium/sodium storage performance in comparison to the counterparts. Evidently, our proposed approach offers valuable guidance for the construction of advanced anodes for lithium/sodium−ion batteries.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1680 - 1688"},"PeriodicalIF":2.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412663","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}

{"title":"Preparation of TiO2 Nano-Flower Coating on Ti Substrates with Good Physical Sterilization Effect and Biocompatibility","authors":"Ruoyu Di,&nbsp;Yonghua Sun,&nbsp;Runhua Yao,&nbsp;Sen Pei,&nbsp;Xiaohong Yao,&nbsp;Ruiqiang Hang","doi":"10.1007/s40195-024-01724-x","DOIUrl":"10.1007/s40195-024-01724-x","url":null,"abstract":"<div><p>We report a facile solution method to form titanium oxide (TiO₂) nano-flower structure on the titanium (Ti) substrates for realizing good physical sterilization and biocompatibility. We first prepare TiO₂ nanotubes (NT) with a diameter of about 80–100 nm and a length of about 5 μm on Ti substrates by anodization, which is utilized as precursor. Then, we employ immersion treatment in different concentrations of phosphoric acid solution at 75 °C for 5 h to realize the transformation from TiO₂ NT to TiO₂ nano-flower structure. In addition, we studied the effects of phosphoric acid concentration (1 wt%, 2.5 wt%, 5 wt% and 10 wt%) on the TiO₂ nano-flower structure, and the antibacterial properties and biocompatibility of the TiO₂ nano-flower structure. The results show that TiO₂ nano-flower structure become larger and thicker with the increase in the phosphoric acid concentration, and the thickness of the coating can reach 6.88 μm. Meanwhile, the TiO₂ nano-flower structure shows good physical sterilization effect, especially for the TiO₂ nano-flower structure formed in 10 wt% H₃PO₄ solution, the antibacterial rate can reach 95%. In addition, the TiO₂ nano-flower structure have no toxicity to the osteoblasts and support cell growth.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1581 - 1589"},"PeriodicalIF":2.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412623","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}

{"title":"Microstructure, Mechanical Properties and Corrosion Resistance of the Mo0.5V0.5NbTiZrx High-Entropy Alloys with Low Thermal Neutron Sections","authors":"Chao Xiang,&nbsp;En-Hou Han,&nbsp;Zhiming Zhang,&nbsp;Huameng Fu,&nbsp;Haifeng Zhang,&nbsp;Jianqiu Wang,&nbsp;Guodong Hu","doi":"10.1007/s40195-024-01728-7","DOIUrl":"10.1007/s40195-024-01728-7","url":null,"abstract":"<div><p>High-entropy alloys exhibit significant potential for application in the nuclear industry owing to their exceptional resistance to irradiation, excellent mechanical properties, and corrosion resistance. In this work, the Mo_0.5V_0.5NbTiZr_<i>x</i> (<i>x</i> = 0–2.0) high-entropy alloys containing alloying elements with low thermal neutron absorption cross section were designed and prepared. The crystal structure, microstructure, mechanical properties and corrosion resistance of the studied alloys were investigated. All the alloys possess a body-centered cubic crystal structure, which is consistent with the CALPHAD (acronym of CALculation of PHAse Diagram) modeling results. The addition of Zr does not alter the crystal structure of the Mo_0.5V_0.5NbTiZr_<i>x</i> alloys; however, it leads to an increase in the lattice constant as Zr content increases. The addition of Zr initially enhances the yield strength, but subsequently leads to a decline as the Zr content increases further. Specifically, the corrosion resistance of the Mo_0.5V_0.5NbTiZr_<i>x</i> alloys in superheated steam at 400 °C and 10.3 MPa decreases with the increase of Zr content. The effect of Zr content on the phase formation, mechanical properties and corrosion resistance of the Mo_0.5V_0.5NbTiZr_<i>x</i> high-entropy alloys are discussed. This study has successfully developed a novel Mo_0.5V_0.5NbTiZr_0.25 high-entropy alloy, which demonstrates exceptional properties including high yield strength, excellent ductility, and superior anti-corrosion performance. The findings of this research have significant implications for the design of high-entropy alloys in nuclear applications.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 10","pages":"1643 - 1656"},"PeriodicalIF":2.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142412617","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}

{"title":"Intermetallic Compounds Formation in Dissimilar Friction Stir Welding of Mg/Cu Alloys","authors":"Xue Li,&nbsp;Qingzhen Zhao,&nbsp;Hao Su,&nbsp;Ji Chen,&nbsp;Chuansong Wu","doi":"10.1007/s40195-024-01714-z","DOIUrl":"10.1007/s40195-024-01714-z","url":null,"abstract":"<div><p>Joining dissimilar Mg/Cu alloys was still an intractable problem because of the excessive intermetallic compounds (IMCs) and poor mechanical properties using conventional welding methods. In the present study, friction stir welding was employed for the butt joining of dissimilar AZ31B Mg-alloy and T2 pure Cu plates. Defect-free Mg/Cu joints were obtained with Mg-RS and Cu-AS configuration, at a welding speed of 50 mm/min and tool rotating speeds of 325 r/min, 625 r/min and 925 r/min. At the joining interface, both Mg₂Cu and MgCu₂ IMC phases were observed, with a clear, uniform and continuous IMCs layer composed of two sub-layers, layer-A of Mg + Mg₂Cu and layer-B of Mg₂Cu + MgCu₂. The maximum ultimate tensile strength of the Mg/Cu friction stir welding joint reached 130 MPa at 925 r/min due to enhanced mechanical interlocking between Mg and Cu, as well as sufficient metallurgical bonding at the joining interface with an IMCs layer thickness in the range of 1.0–2.0 μm.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 9","pages":"1523 - 1532"},"PeriodicalIF":2.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346004","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}

{"title":"Effects of Boron Addition on the Microstructure and Mechanical Properties of γ′-Strengthened Directionally Solidified CoNi-Base Superalloy","authors":"Shasha Qu,&nbsp;Yingju Li,&nbsp;Bingyu Lu,&nbsp;Cuiping Wang,&nbsp;Yuansheng Yang","doi":"10.1007/s40195-024-01715-y","DOIUrl":"10.1007/s40195-024-01715-y","url":null,"abstract":"<div><p>The effects of B addition on microstructure and mechanical properties of a γ′-strengthened CoNi-base superalloy are investigated. The addition of B leads to a substantial increase in the volume fraction of both the eutectic structure and borides. The CoNi-base alloy shows a high solubility limit for the element B. Borides become noticeable in the area surrounding the eutectic structure after the B level exceeds 0.46 at.%. It is found that the compression property and stress rupture life of the 4W2Ta alloys exhibit an initial rise followed by a subsequent drop as the B content gradually increases from 0.08 to 0.78 at.%. The 4W2Ta0.46B alloy demonstrates the most excellent high-temperature strength and stress rupture life, revealing that a moderate amount of B in the alloy noticeably enhances its mechanical properties by enhancing the grain boundary cohesion.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 8","pages":"1438 - 1452"},"PeriodicalIF":2.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141345129","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}

{"title":"Hot Deformation Behavior and Workability of a New Ni–W–Cr Superalloy for Molten Salt Reactors","authors":"Long Liu,&nbsp;Zijian Zhou,&nbsp;Jie Yu,&nbsp;Xinguang Wang,&nbsp;Chuanyong Cui,&nbsp;Rui Zhang,&nbsp;Yizhou Zhou,&nbsp;Xiaofeng Sun","doi":"10.1007/s40195-024-01701-4","DOIUrl":"10.1007/s40195-024-01701-4","url":null,"abstract":"<div><p>The hot deformation behavior of a newly developed Ni–W–Cr superalloy for use in 800 °C molten salt reactors (MSRs) was looked into by isothermal compression tests in the temperature range of 1050–1200 °C with a strain rate of 0.001–1 s⁻¹ under a true strain of 0.693. An Arrhenius-type model for the Ni–W–Cr superalloy was constructed by fitting the corrected flow stress data. In this model, the effect of dispersion of solid solution elements during thermal deformation on microstructure evolution was considered, as well as the effects of friction and adiabatic heating on the temperature and strain rate-dependent variation of flow stresses. The hot deformation activation energy of the Ni–W–Cr superalloy was 323 kJ/mol, which was less than that of the Hastelloy N alloy (currently used in MSRs). According to the rectified flow stress data, processing maps were created. In conjunction with the corresponding deformation microstructures, the flow instability domains of the Ni–W–Cr superalloy were determined to be 1050–1160 °C/0.03–1 s⁻¹ and 1170–1200 °C/0.001–0.09 s⁻¹. In these deformation conditions, a locally inhomogeneous microstructure was caused by flow—i.e., incomplete dynamic recrystallization and hot working parameters should avoid sliding into these domains. The ideal processing hot deformation domain for the Ni–W–Cr superalloy was determined to be 1170–1200 °C/0.6–1 s⁻¹.</p></div>","PeriodicalId":457,"journal":{"name":"Acta Metallurgica Sinica-English Letters","volume":"37 8","pages":"1453 - 1466"},"PeriodicalIF":2.9,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40195-024-01701-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141347896","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}