文献类型：期刊文献

英文题名：Deformation mechanism transition and ductility enhancement in Ti-55531 alloy under combined pre-torsion and tension loading

作者：Hu, Kong-liang Huang, Chao-wen Yang, Jiang Zhao, Lun Su, Hai Liu, Dan Li, Tian-xin

第一作者：Hu, Kong-liang

通信作者：Huang, CW[1];Huang, CW[2];Su, H[3]

机构：[1]Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China;[2]Guizhou Univ, Key Lab Mat Struct & Strength Guizhou Prov, Guiyang 550025, Peoples R China;[3]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]Guizhou Ind Polytech Coll, Fac Intelligent Mfg Engn, Guiyang 551400, Peoples R China;[5]Guizhou Anda Aviat Forging Co Ltd, Anshun 561000, Peoples R China

第一机构：Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Natl & Local Joint Engn Lab High Performance Met S, Guiyang 550025, Peoples R China;corresponding author), Guizhou Univ, Key Lab Mat Struct & Strength Guizhou Prov, Guiyang 550025, Peoples R China;corresponding author), Guizhou Anda Aviat Forging Co Ltd, Anshun 561000, Peoples R China.

年份：2026

卷号：36

期号：8

起止页码：2335-2353

外文期刊名：TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001851193800001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52061005, 52261025), the Science and Technology Program of Guizhou Province, China (Nos. YQK[2023]009, CXTD[2023]009, GCC[2023]098). The authors would like to thank Dr. Xue-hao ZHENG from ZKKF (Beijing) Science & Technology Company for supporting of TEM analysis and Jin-hua DAI from Northwestern Polytechnical University for supporting of EBSD analysis.

语种：英文

外文关键词：metastable beta titanium alloy; pre-torsion; tension-torsion complex loading; deformation mechanism; fracture behavior; mechanical properties; microstructure evolution

摘要：The effects of varying pre-torsion amounts (35 and 41 N & centerdot;m) on the tensile properties, deformation mechanisms, and fracture behavior of Ti-55531 alloy with a bimodal microstructure were investigated using a combined pre-torsion and tension loading approach. The findings reveal that pre-torsion deformation prior to tension enhances the activity of plastic deformation mechanisms by promoting dislocation slip and altering grain orientation. Under uniaxial tensile loading, the alpha p phase activates multiple prismatic slip planes without significant interaction. Conversely, under pre-torsion (35, 41 N & centerdot;m)-tension loading, the alpha p phase predominantly induces interactions among multiple slip planes within the prismatic slip system, resulting in an increased density of slip lines as the pre-torsion amount increases. Furthermore, pre-torsion promotes the formation of high-density twins within a single alpha s lath following tensile deformation.