期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141567
关键词
Mg alloy; Extrusion; Microstructure; Mechanical properties; Sandwich-like grain structure
类别
资金
- National Natural Science Foundation of China [51531002, 51971042, 51901028]
- National Key Research and Development Program of China [2016YFB0301100]
- Youth Project of Science and Technology Research Program of Chongqing EducationCommission of China [KJ201903136636560]
- Chongqing Academician Special Fund [cstc2018jcyjyszxX0007, cstc2019yszxjcyjX0004, cstc2020yszxjcyjX0001, cstc2018jcyjAX0070]
- Sinoma Institute of Materials Research (Guang Zhou) Co., Ltd (SIMR)
By controlling the Mn content in the alloy, a novel sandwich grain structure was achieved in Mg-Mn-Ce alloys, leading to improved mechanical properties.
A novel sandwich grain structure of an Mg-Mn-Ce alloy was achieved by controlling the content of Mn in the traditional extrusion process. The solid-state Mn was dynamically precipitated during the extrusion. These finely precipitated particles hindered the grain boundary migration and refined the dynamically recrystallized grains. A sandwich-like grain structure was formed in as-extruded Mg-Mn-Ce alloys with Mn content increasing from 0.3 wt% to 0.9 wt%. This sandwich-like grain structure induced a tensile yield stress (TYS) that was improved from 86.5 MPa to 166.7 MPa; the Mg-0.9Mn-0.5Ce alloy exhibited improved yield isotropy. Here we discuss the formation mechanism for the sandwich-like grain structure and the strengthening mechanism in detail.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据