Creep properties and controlled creep mechanism of as-cast Mg-5Zn-2.5Er alloy

The creep behaviors of as-cast Mg-5Zn-2.5Er alloy （mass fraction, %）, under various applied stresses （50-70 MPa） and creep temperatures （150-200 ℃） for 100 h, were investigated. The stress exponent n is in the range of 1.5-5.8, and the activation energy Qc is in the range of 28.3-77.1 kJ/mol. With r...

Full description

Saved in:
Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2010-07, Vol.20 (7), p.1212-1216
Main Author: 李晗 杜文博 李建辉 李淑波 王朝辉
Format: Article
Language:English
Subjects:
as-cast magnesium alloy
China
Creep (materials)
creep mechanism
erbium
Grain boundaries
magnesium alloy
Magnesium base alloys
Mathematical analysis
Microstructure
Quality control
Stresses
应力指数
蠕变机制
蠕变特性
蠕变行为
质量分数
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The creep behaviors of as-cast Mg-5Zn-2.5Er alloy （mass fraction, %）, under various applied stresses （50-70 MPa） and creep temperatures （150-200 ℃） for 100 h, were investigated. The stress exponent n is in the range of 1.5-5.8, and the activation energy Qc is in the range of 28.3-77.1 kJ/mol. With respect to the calculated n and Qc as well as the microstructures after creep, it is suggested that there is a transition region between grain boundary sliding（GBS） dominated creep to dislocation creep mechanism （from n〈3 to n〉3）, arising in the steady-stage creep rate value of 2.89× 10^-9 s^-1.
ISSN:1003-6326
DOI:10.1016/S1003-6326(09)60280-6