Dynamic recrystallization mechanism of Mg-8.5Gd-2.5Y-0.4Zr alloy during hot ring rolling

Release time:2021-07-12

Impact Factor:4.342

DOI number:10.1016/j.matchar.2017.07.015

Journal:Materials Characterization

Key Words:Magnesium alloys; Hot ring rolling; Dislocations; Dynamic recrystallization; TEM

Abstract:Dynamic recrystallization (DRX) behavior of Mg-8.5Gd-2.5Y-0.4Zr alloy subjected to hot ring rolling was investigated in this paper. Three different DRX mechanisms were identified based on TEM: "fragmentation" of lamellar structures, transformation of subgrains separated by dislocation arrays, and strain-induced boundary bulging mechanism. Therein, the first one is a novel mechanism that has not been reported before in magnesium and its alloys. Preliminary analysis suggests that this mechanism might result from the high strain rate and continuous repeated rolling deformation provided by hot ring rolling.

Co-author:Chuming Liu, Shunong Jiang, Zhangqi Bao

First Author:Shilun Yu

Correspondence Author:Yonghao Gao

Document Code:WOS:000411535600015

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:131

Page Number:135-139

Translation or Not:no

Date of Publication:2017-09-01

Included Journals:SCI、EI