蔡建华,毛小南,辛社伟,周伟,李倩,赵永庆.应变对β固溶Ti-55531合金室温压缩变形机制的影响[J].稀有金属材料与工程,2019,48(5):1651~1656.[Cai Jianhua,Mao Xiaonan,Xin Shewei,Zhou Wei,Li Qian,Zhao yongqing.Effect of Strain on Deformation Mechanism of Ti-55531 Alloy Under Room Temperature Compression[J].Rare Metal Materials and Engineering,2019,48(5):1651~1656.]
应变对β固溶Ti-55531合金室温压缩变形机制的影响
投稿时间:2017-10-16  修订日期:2017-12-06
中文关键词:  Ti-55531合金  室温压缩  变形机制
基金项目:国家自然科学基金(项目号51471136),国家国际科技合作(项目号2015DFA51430)
中文摘要:
      研究应变对β固溶处理后Ti-55531合金室温压缩变形机制的影响,相变点以上固溶水淬处理后得到全β组织,使用 Gleeble3800热模拟试验机和6.3MN锻造模拟试验机完成室温压缩。运用OM,XRD和TEM对不同应变后的组织进行观察,结果表明:应变速率为0.0005s-1,工程应变量为30%室温压缩真应力-真应变曲线有明显的应变硬化阶段,应变速率为0.1s-1,工程应变量为30%室温压缩真应力-真应变曲线无明显的应变硬化阶段;室温压缩真应力-真应变曲线均无双屈服现象,不同应变速率条件下,相同应变量的变形组织特征差异较小,室温压缩变形机制以滑移为主,随着应变量的增大,位错密度逐渐增大,出现了位错塞积、位错缠结和剪切;工程应变量为30%出现了应变诱发α"马氏体转变;应变速率为10s-1,工程应变量为50%和60%也出现了应变诱发α"马氏体转变。
Effect of Strain on Deformation Mechanism of Ti-55531 Alloy Under Room Temperature Compression
英文关键词:Ti-55531 alloy  compression at room temperature  deformation mechanisms
英文摘要:
      Based on metastable beta titanium alloy Ti-55531, the structure of the sample was obtained by solution quenching above the β phase. Room temperature compression was performed using a Gleeble3800 thermal simulation test machine and a 6.3MN forging simulator. OM, XRD and TEM were used to observe the deformed structrures after different strains. The results show that the maximum compression of 30% room temperature compression true-stress and true-strain curve at the strain rate of 0.0005s-1 is mainly divided into two stages that are elastic deformation stage and plastic deformation stage with obvious strain hardening stage. However, the maximum compression of 30% room temperature compression true-stress and true-strain curve at the strain rate of 0.1s-1 is mainly divided into two stages that are elastic deformation stage and plastic deformation stage without obvious strain hardening stage. Both of them do not have double yield phenomenon. The deformation structures have little different at the different strain rates of the same reduction. The deformation mechanism is dominated by slip. With the strain increasing, the dislocation density increases gradually and the dislocation tangles and shears appear. Strain induced martensite transformation occurs at the compression of 30% and the strain rate of 0.0005s-1 and 0.1s-1. The compression of 50% and 60% also appears strain induced martensite transformation at the strain rate of 10s-1.
作者单位E-mail
蔡建华 东北大学 材料科学与工程学院 caijianhua2008@126.com 
毛小南 东北大学 材料科学与工程学院  
辛社伟 西北有色金属研究院  
周伟 西北有色金属研究院  
李倩 西北有色金属研究院  
赵永庆 西北有色金属研究院  
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