Fabrication of Strong and Ductile AZ31 Magnesium Alloy Using High Strain Rate Multiple Forging in a Wide Temperature Range

Metals

Xiao Liu¹  Zhicheng Nie¹  Bin Deng²  Tuo Ye²  Yuanzhi Wu² 

[1] College of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;Research Institute of Automobile Parts Technology, Hunan Institute of Technology, Hengyang 421002, China;

关键词: AZ31 alloy;    high strain rate multiple forging;    mechanical property;    microstructure;    texture;   

DOI  :  10.3390/met10060729

来源: DOAJ

【 摘 要 】

High strain rate multiple forging (HSRMF) was successfully carried out on AZ31 magnesium alloy at a temperature range of 250–400 °C, and the microstructure, texture and mechanical properties were examined. Full recrystallized structure developed at a relatively lower strain due to the twining induced dynamic recrystallization (TDRX) mechanism, which is also responsible for the feasibility of HSRMF deformation at relative low temperature. The average grain sizes of the alloys high strain rate multiple forged (HSRMFed) to the accumulated strain of = 1.32 increased from 7.07 to 9.99 μm as the temperature ranged from 250 to 400 °C, i.e., the grain sizes of the HSRMFed alloy were less sensitive to temperature. The weakened basal texture characteristic of titled or double peak achieved was ascribed to the alteration of forging direction. The HSRMFed alloys demonstrated both excellent strength (UTS > 300 MPa) and good ductility (δ > 20%), which resulted from the combined effects of grain refinement and weakened basal texture. Therefore, HSRMF was an efficient technique to produce strong and ductile wrought AZ31 alloy.

【 授权许可】

Unknown