文献类型：期刊文献

英文题名：Dynamic Recrystallization and Grain Refinement in Extruded AZ31 Rod During Hot Torsion Deformation at 150 degrees C

作者：Chen, Hongbing Song, Bo Guo, Ning Liu, Tingting Zhou, Tao He, Jiejun

第一作者：Chen, Hongbing

通信作者：Song, B[1]

机构：[1]Southwest Univ, Coll Engn & Technol, Chongqing 400715, Peoples R China;[2]Southwest Univ, Fac Mat & Energy, Chongqing 400715, Peoples R China;[3]Chongqing Univ Technol, Coll Mat Sci & Engn, Chongqing 400054, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Southwest Univ, Coll Engn & Technol, Chongqing 400715, Peoples R China

通信机构：corresponding author), Southwest Univ, Fac Mat & Energy, Chongqing 400715, Peoples R China.

年份：2019

卷号：25

期号：1

起止页码：147-158

外文期刊名：METALS AND MATERIALS INTERNATIONAL

收录：;Scopus(收录号：2-s2.0-85051290700);WOS:【SCI-EXPANDED(收录号:WOS:000455666600015)】；

基金：This project was financially supported by the Fundamental Research Funds for the Central Universities (SWU117002), the National Natural Science Foundation of China (51601154 and 51501045) and Natural Science Foundation of Guizhou Province (Grant No. [2015] 2067).

语种：英文

外文关键词：Magnesium alloys; Hot torsion; Dynamic recrystallization; Texture

摘要：The dynamic recrystallization mechanism and microstructure evolution in an extruded AZ31 rod during hot torsion deformation at 150 degrees C were investigated. It indicated that several dynamic recrystallization mechanisms were initiated during hot torsion deformation, including discontinuous DRX (DDRX), continuous DRX (CDRX) and twinning induced DRX (TDRX). With increasing strain, CDRX became the dominant DRX mechanism and contributed to a remarkable refinement of grains. A gradient distribution of dynamic recrystallization grains on the cross section of samples generated due to the gradient shear strain in twisted samples. Hot torsion can also arouse the c-axis of grains to rotate towards the extrusion direction. From low strain to high strain, the recrystallized grains exhibited a similar texture development with the deformed grains. The relevant mechanisms were revealed.