Hot compression behavior of the Mg-Gd-Y-Zn-Zr alloy filled with intragranular long-period stacking ordered phases

Release time:2021-07-12

Impact Factor:5.316

Journal:Journal Of Alloys And Compounds

Key Words:Magnesium alloy; Long-period stacking ordered; Compression ;Microstructure ; Mechanical property

Abstract:The compression behavior and mechanical properties of the Mg-6.9Gd-3.2Y-1.5Zn-0.5Zr (wt.%) alloy filled with intragranular long-period stacking ordered (LPSO) phases were investigated. This alloy possesses a high activation energy of similar to 359 kJ/mol, because intragranular LPSO phases inhibit the lattice rotation of a-Mg matrix and may provide back stress. Compression temperature and strain rate (i.e. Zener-Hollomon parameters) combine to influence the DRX (ratio and grain size), workability, and mechanical properties, while the effect of strain rate on the DRX-ed grain size may be reduced at the compression temperature of 450 degrees C. The alloy compressed at 420 degrees C and 0.002 s(-1) exhibits the superior strength because of the finer DRX-ed grain size, larger number of dynamic precipitates and kink bands. However, dynamic precipitates deteriorate the ductility and workability.

Co-author:Chuming Liu, Shunong Jiang, Wenhui Liu, Liwei Lu

First Author:Xiaojie Zhou

Indexed by:Journal paper

Correspondence Author:Yonghao Gao

Document Code:WOS:000407848400065

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:724

Page Number:528-536

ISSN No.:0925-8388

Translation or Not:no

Date of Publication:2017-11-15

Included Journals:EI、SCI