Materials Science and Engineering: A最新文献_第10页

Strengthening of metastable β-T9V alloy via α′ martensite regulation and α-phase introduction

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-26 DOI: 10.1016/j.msea.2025.148262

Ruidong Yang , Zhefeng Xu , Mengying Zhu , Jiankai Bai , Satoshi Motozuka , Bingxin Cong , Yan Wang , Huihui Zhang , Kazuhiro Matsugi , Mingzhen Ma

{"title":"Strengthening of metastable β-T9V alloy via α′ martensite regulation and α-phase introduction","authors":"Ruidong Yang , Zhefeng Xu , Mengying Zhu , Jiankai Bai , Satoshi Motozuka , Bingxin Cong , Yan Wang , Huihui Zhang , Kazuhiro Matsugi , Mingzhen Ma","doi":"10.1016/j.msea.2025.148262","DOIUrl":"10.1016/j.msea.2025.148262","url":null,"abstract":"<div><div>Low strength is a key limitation for the engineering applications of metastable β titanium alloys. This study aims to achieve high strength in the metastable β Ti-9V-5Zr-3Al-2Cr (wt. %) alloy by regulating the type and size of α′ martensite and the fraction of α-phase through hot-rolling. After rolling and quenching at 850 °C, 800 °C, and 750 °C, the alloys consisted of a large amount of α′ martensite. During tensile testing, the reorientation of α′ martensite enhanced the work-hardening and plastic deformation in the alloy. Rolling at 850 °C, α′ martensite is all dislocation type, i.e. dislocation α′ martensite (DM), but the martensite size is large, leading to a low tensile strength of 850 MPa. When the rolling temperature decreased to 800 °C, the α′ martensite grains were refined, and twinned α′ martensite (TM) appeared. The heterostructure formed by DM and TM generated back-stress strengthening, increasing tensile strength to 1030 MPa. Rolling at 750 °C, the two types of martensite grains were further refined, and α sub-grains were retained within the prior β grains, improving tensile strength to 1090 MPa. However, after rolling at 700 °C, α′ martensite disappeared, and the alloy was composed of α- and β-phases. Stress concentration at the phase boundaries significantly reduced plasticity. This study demonstrates the influence of α′ martensite deformation behavior and the introduction of trace α-phase on the mechanical properties of metastable β titanium alloys, providing a viable strategy for strengthening such alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148262"},"PeriodicalIF":6.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738852","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

Ceramic particles induce microstructure modification to achieve excellent strength-ductility combination of additive manufactured AlSi10Mg alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-26 DOI: 10.1016/j.msea.2025.148259

Yating Li , Gaoqiu Sun , Zhiping Wang , Huanhuan Sun , Yaqi Deng , Xu Yuan , Xianfeng Li , Haowei Wang

{"title":"Ceramic particles induce microstructure modification to achieve excellent strength-ductility combination of additive manufactured AlSi10Mg alloy","authors":"Yating Li , Gaoqiu Sun , Zhiping Wang , Huanhuan Sun , Yaqi Deng , Xu Yuan , Xianfeng Li , Haowei Wang","doi":"10.1016/j.msea.2025.148259","DOIUrl":"10.1016/j.msea.2025.148259","url":null,"abstract":"<div><div>The introduction of ceramic particles into aluminum (Al) alloys could enhance the strength of alloys but usually decrease the ductility. In this study, we employ the ceramic particles into additive manufactured AlSi10Mg alloy to enhance the strength and ductility simultaneously. The effect of TiB<sub>2</sub> particles on the microstructure during additive friction stir deposition (AFSD) and subsequent heat treatment was systematically studied. The results show the TiB<sub>2</sub> particles can refine grains during AFSD process, and improve the stability of Si particles and grain boundaries during solution treatment, and accelerate the aging response during aging treatment, leading to the rapid aging response of composite. Specifically, the TiB<sub>2</sub>/AlSi10Mg composite aged at 170 °C for 1 h achieves excellent strength-ductility combination with the ultimate tensile strength reaching 353 MPa and the ductility reaching 7.7 %, overcoming the strength-ductility trade off in AFSDed AlSi10Mg alloys. The enhancement of the strength-ductility combination of TiB<sub>2</sub>/AlSi10Mg composite should be attributed to grain refinement, stable Si particles and TiB<sub>2</sub> particles, reducing stress concentration near Si particle and preventing the crack propagation. These findings provide the new insights on tailoring microstructure and performance of additive manufactured Al alloys by ceramic particles.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148259"},"PeriodicalIF":6.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759616","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

Grain-boundary-relaxed nanocrystalline metallic tungsten alloy with ultra-high hardness and thermal stability

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-25 DOI: 10.1016/j.msea.2025.148251

Yu He , Shengwei Xin , Baoru Sun , Xuecheng Cai , Yapeng Lin , Lingwei Kong , Xun Shen , Congcong Du , Xiaoyuan Yuan , Kangkang Wen , Tongde Shen

{"title":"Grain-boundary-relaxed nanocrystalline metallic tungsten alloy with ultra-high hardness and thermal stability","authors":"Yu He , Shengwei Xin , Baoru Sun , Xuecheng Cai , Yapeng Lin , Lingwei Kong , Xun Shen , Congcong Du , Xiaoyuan Yuan , Kangkang Wen , Tongde Shen","doi":"10.1016/j.msea.2025.148251","DOIUrl":"10.1016/j.msea.2025.148251","url":null,"abstract":"<div><div>Metals are often soft while ceramics are often hard. To make metals as hard as ceramics has been long-awaited in metals and ceramics communities. In this study, bulk nanocrystalline (NC) tungsten-1 wt% yttrium-0.7 wt% titanium (WYT) was fabricated via mechanical alloying followed by high-temperature/high-pressure sintering. The high pressure directly inhibits grain growth by suppressing atomic diffusion and indirectly inhibits grain growth by lowering sintering temperature, enabling the synthesis of dense NC WYT bulks with an average grain size of ∼ 9.0 nm. The high temperature causes annealing- and segregation-induced structural relaxation of grain boundaries (GBs) in sintered bulk NC WYT, resulting in GBs with a small excess volume of only ∼ 0.005 nm, one fifth that of bulk NC tungsten. The small grain size and the relaxed GBs in the bulk NC WYT make it hard for GBs to emit dislocations, resulting in extremely high hardness of 23.2 ± 0.3 GPa, yield strength of 9.4 ± 0.3 GPa, and ultimate compressive strength of 13.1 ± 1.1 GPa. The hardness of metallic bulk NC WYT is comparable to that of ceramic tungsten carbide (WC) whereas the wear rate of bulk NC WYT is even lower than that of WC. The structure-relaxed GBs lower the thermodynamic driving force for grain growth and result in an extremely high thermal stability - no grain growth occurs in bulk NC WYT annealed at a high temperature of 1500 °C, which is above the recrystallization temperature of tungsten. The present strategy - multifunctional treatments of NC alloy powders by high-temperature/high-pressure - provides a huge potential to manufacture dense bulk NC materials with exceptional mechanical property and thermal stability for practical applications.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148251"},"PeriodicalIF":6.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768579","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

Strain rate induced TRIP/TWIP effects and damage initiation in a novel Fe-Mn-Al-Nb medium manganese steel: Experiments and modeling

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-25 DOI: 10.1016/j.msea.2025.148209

Ning Guo , Xinping Ji , Jiyuan Liu , Bingtao Tang , Guangchun Xiao , Jilai Wang , Fei Wang

{"title":"Strain rate induced TRIP/TWIP effects and damage initiation in a novel Fe-Mn-Al-Nb medium manganese steel: Experiments and modeling","authors":"Ning Guo , Xinping Ji , Jiyuan Liu , Bingtao Tang , Guangchun Xiao , Jilai Wang , Fei Wang","doi":"10.1016/j.msea.2025.148209","DOIUrl":"10.1016/j.msea.2025.148209","url":null,"abstract":"<div><div>To evaluate the strength and plasticity of Fe-Mn-Al-Nb medium manganese steel (MMnS) under extreme impact conditions, tensile tests were carried out using a universal testing machine and a split Hopkinson tensile bar, with strain rates ranging from 0.001 s<sup>−1</sup> to 3000 s<sup>−1</sup>. The initial crystal orientation data provided by electron backscatter diffraction (EBSD) were used to establish a crystal plasticity phase-field (CP-PFM) model using DAMASK software, and the plasticity behavior and damage evolution of this model were studied. The study systematically examines the plastic deformation mechanisms of MMnS at strain rates of 0.001 s<sup>−1</sup> to 3000 s<sup>−1</sup>, as well as damage initiation at the dynamic strain rate. The results show that strain hardening at 0.001 s<sup>−1</sup> is mainly determined by the transformation induced plasticity (TRIP) effect and dislocation activity. At the strain rate of 3000 s<sup>−1</sup>, initial hardening results primarily from the combined actions of dislocations and the TRIP effect, while subsequent hardening is dominated by the TRIP and twinning induced plasticity (TWIP) effects. Dislocation accumulation leads to the formation of low-angle grain boundaries and promotes strain localization. In addition, austenite is capable of activating a greater number of slip systems compared to ferrite, enabling it to accommodate external forces via multiple slip pathways. This characteristic results in enhanced plasticity and deformation capacity for austenite. It is noted that damage nucleates initially at the interfaces between ferrite and austenite grains and then diffuses into the grains.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148209"},"PeriodicalIF":6.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687890","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

Effect of spark plasma sintering on alloying, densification and mechanical properties of C103 niobium alloy

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-25 DOI: 10.1016/j.msea.2025.148249

Md Shafiqur Rahman Jame, K.S. Ravi Chandran

{"title":"Effect of spark plasma sintering on alloying, densification and mechanical properties of C103 niobium alloy","authors":"Md Shafiqur Rahman Jame, K.S. Ravi Chandran","doi":"10.1016/j.msea.2025.148249","DOIUrl":"10.1016/j.msea.2025.148249","url":null,"abstract":"<div><div>There is a revival of interest in niobium (Nb) based alloys for high-temperature structural applications, due to their relatively higher melting point, lower density, as well as more tolerance to interstitials compared to other refractory metals. Although some wrought Nb alloys were made by ingot metallurgy in the past, powder metallurgy processing of Nb alloys has not been well developed. In particular, optimum sintering conditions, alloy homogenization and densification behavior in powder metallurgy processing have not been well understood. In this study, alloying and sintering behavior of C103 niobium alloy (Nb-10Hf-1Ti; composition in wt.%), during spark plasma sintering (SPS), have been investigated. The objective is to study the densification, homogenization, and microstructure evolution during spark plasma sintering at temperatures significantly below the solidus temperature. The alloy densified almost fully with very little residual porosity (∼1.3 vol. %) and exhibited 394 MPa yield strength, 458 MPa tensile strength, 23 % elongation and a plane stress fracture toughness (K<sub>Q</sub>) value of ∼25 MPa√m. The strength levels are significantly higher than that of the wrought C103 alloy. The ductility was found to be only slightly reduced (from 26 to 23 %) relative to the wrought version, even though the oxygen levels were relatively higher (>2000 ppm) in the present alloy. The strength levels are also significantly higher than those found in additive-manufactured (EB-PBF and LB-PBF) C103 niobium alloys and without any loss in ductility. The strengthening mechanisms as well as the microstructural factors that lead to the ductility and high fracture toughness levels are discussed.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148249"},"PeriodicalIF":6.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143738853","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

Interface interlocking enhances mechanical strength of wire-arc directed energy deposited Mg-Al-Si/Mg-Gd-Y-Zn bimetals

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-24 DOI: 10.1016/j.msea.2025.148254

Qifei Han, Xinglong Di, Yuanxuan Zheng, Shuijun Ye, Yueling Guo, Changmeng Liu

{"title":"Interface interlocking enhances mechanical strength of wire-arc directed energy deposited Mg-Al-Si/Mg-Gd-Y-Zn bimetals","authors":"Qifei Han, Xinglong Di, Yuanxuan Zheng, Shuijun Ye, Yueling Guo, Changmeng Liu","doi":"10.1016/j.msea.2025.148254","DOIUrl":"10.1016/j.msea.2025.148254","url":null,"abstract":"<div><div>A novel Mg-Al-Si/Mg-Gd-Y-Zn bimetals with interlocking structure is manufactured using wire-arc directed energy deposition, with an interface remelting strategy. The results indicate that the bimetallic interface of non-remelting is composed of a composition transition region, with 18R-long-period stacking ordered phase and large-sized mixtures of Mg<sub>17</sub>Al<sub>12</sub>, Mg<sub>2</sub>Si as well as Mg(Gd, Y) phases. After remelting, the bimetallic interface transforms into an interlocking structure. The grains near the interface are refined and shrinkage pores are eliminated. The yield strength of bimetal increases by 18.8 %. The fracture surface shows that the non remelted sample fractures in the transition zone, while the remelted sample fractures in the Mg-Al-Si alloy region. The digital image correlation results indicate that the interlocking structure can release the internal stress of the bimetallic interface. The improved strength mainly derives from interlocking structure and grain refinement strengthening.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148254"},"PeriodicalIF":6.1,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725911","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 properties of 2219 aluminum alloy deposited by resistance seam additive manufacturing through rolling and heat treatment: Microstructure evolution and strengthening mechanism

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-24 DOI: 10.1016/j.msea.2025.148253

Wenqin Wang , Yijie Guo , De Wang , Jie Chen , Dichao Wu , Hong Chen

{"title":"Enhancing the properties of 2219 aluminum alloy deposited by resistance seam additive manufacturing through rolling and heat treatment: Microstructure evolution and strengthening mechanism","authors":"Wenqin Wang , Yijie Guo , De Wang , Jie Chen , Dichao Wu , Hong Chen","doi":"10.1016/j.msea.2025.148253","DOIUrl":"10.1016/j.msea.2025.148253","url":null,"abstract":"<div><div>Resistance seam additive manufacturing (RSAM) is a novel technology that deposits metal powder layer by layer through pressure and resistance heat to achieve bulk materials. In this study, 2219 aluminum alloy blocks were prepared using this technology, and subsequently subjected to rolling treatment and solution and aging (T6) heat treatment. The results indicated that, the rolling treatment reduced the porosity, increased the dislocation density of the sample, and enhanced the solid solubility of Cu element in the matrix. T6 heat treatment caused the dissolution of the α+θ eutectic into the matrix and then θ phase and θ′ phase were re-precipitated. Especially after the Rolling + T6 hybrid process, a uniform distribution of nanoscale needle-like θ′ phases was precipitated in the sample. The fine and densely dispersed θ′ phases not only effectively pinned dislocations but also cooperated with the matrix deformation, and under their precipitation strengthening effect, the material achieved excellent mechanical properties, with yield strength, ultimate tensile strength, and elongation increasing from 105 MPa, 126.4 MPa, and 6.9 % to 334.6 MPa, 506.6 MPa, and 16.1 %, respectively. This study provides a new pathway for the additive manufacturing of high-strength aluminum alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148253"},"PeriodicalIF":6.1,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725912","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

Synergistic enhancement of strength and plasticity for laser direct energy deposited Ti60 joint by locally applied laser shock peening 通过局部激光冲击强化协同提高激光直接能量沉积 Ti60 接头的强度和塑性

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-24 DOI: 10.1016/j.msea.2025.148255

Yongxin Zhang , Wei Guo , Hongyu Zhang , Peipei Han , Shijian Li , Jinbin Zhao , Zhanbo Cui , Ying Zhu , Hongqiang Zhang

引用次数: 0

Research on the recrystallization behavior, strengthening and toughening synergy, and fracture mechanisms of multi-layer AZ31 composite sheets using single-pass large-strain rolling techniques

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-24 DOI: 10.1016/j.msea.2025.148256

Yuchen Zhao , Tao Jiang , Jiyu Wu , Shenao Jiang , Wenjun Zhou , Wei Yu , Shaolei Liu , Wanshun Zhang , Yong Li , Yonghui Sun , Hongyang Zhao , Guangming Xu , Zhaodong Wang

{"title":"Research on the recrystallization behavior, strengthening and toughening synergy, and fracture mechanisms of multi-layer AZ31 composite sheets using single-pass large-strain rolling techniques","authors":"Yuchen Zhao , Tao Jiang , Jiyu Wu , Shenao Jiang , Wenjun Zhou , Wei Yu , Shaolei Liu , Wanshun Zhang , Yong Li , Yonghui Sun , Hongyang Zhao , Guangming Xu , Zhaodong Wang","doi":"10.1016/j.msea.2025.148256","DOIUrl":"10.1016/j.msea.2025.148256","url":null,"abstract":"<div><div>In this study, we utilized single-pass large-strain rolling technology to successfully fabricate multi-layered AZ31 magnesium alloy composite sheets with excellent mechanical properties. Using SEM analysis, large-area EBSD stitching tests, and tensile experiments, we systematically investigated the microstructure evolution, recrystallization behavior, structure-performance response mechanism, and fracture mechanism of the composite sheets. The results of our research revealed that the degree of recrystallization in the material increases with the number of composite layers, primarily driven by twinning-induced recrystallization. With five layers, the sheets achieve optimal overall mechanical performances, with a tensile strength of 258 MPa, an elongation rate of 22.7 %, and a strength-ductility product of 47.2 MPa%. Furthermore, we ascertained that the main fracture mechanism is ductile fracture. Calculations showed that the primary strengthening mechanisms are grain refinement, dislocation strengthening, and texture strengthening. Of these, dislocation strengthening exerts the greatest influence on enhancing material performance. The findings of this research demonstrate the feasibility of using single-pass large-strain rolling for producing multi-layered AZ31 magnesium alloy composite sheets. Besides, this paper also offers valuable theoretical and technical references for producing fine-grained, high-strength magnesium alloys.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148256"},"PeriodicalIF":6.1,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714509","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

Analysis of abnormal grain growth in 6061 aluminum alloy during high-temperature solution treatment following forging

IF 6.1 2区材料科学

Materials Science and Engineering: A Pub Date : 2025-03-24 DOI: 10.1016/j.msea.2025.148252

Juncheng Mao , Fanlin Zheng , Shiquan Huang , Hailin He , Yunfan Fu , Youping Yi , Canyang Chen

{"title":"Analysis of abnormal grain growth in 6061 aluminum alloy during high-temperature solution treatment following forging","authors":"Juncheng Mao , Fanlin Zheng , Shiquan Huang , Hailin He , Yunfan Fu , Youping Yi , Canyang Chen","doi":"10.1016/j.msea.2025.148252","DOIUrl":"10.1016/j.msea.2025.148252","url":null,"abstract":"<div><div>The conventional forging process for 6061 aluminum alloy typically involves hot forging followed by solution heat treatment (SHT). However, during this process, the grain size can rapidly grow to the millimeter scale, resulting in uncontrollable and undesired coarse grains. In this study, the misorientation at the growth front of abnormal grains in forged 6061 aluminum alloy during solution heat treatment was measured, estimating the grain boundary energy to satisfy the energy state conditions for triple junction line wetting. This indicates that some particles, distant from the abnormally grown grains, are actually identical to the abnormally grown grains and are three-dimensionally connected. An improved combined process was proposed to suppress abnormal grain growth: replacing air cooling with water quenching after hot forging and adding room-temperature deformation prior to heat treatment. The lower limit of single-pass deformation is set between 10 % and 20 %, with 20 % deformation in a single pass showing a noticeable suppressive effect on AGG without causing cracking, this approach ensures that even large free forgings, approximately 150 mm in cross-section, maintain normal grain structures in both the core and edge regions, the average grain size is approximately 80 μm.</div></div>","PeriodicalId":385,"journal":{"name":"Materials Science and Engineering: A","volume":"932 ","pages":"Article 148252"},"PeriodicalIF":6.1,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734947","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