A Review of Different Creep Mechanisms in Mg Alloys Based on Stress Exponent and Activation Energy

被引：82

作者：

Athul, Karuna Ratnakaran ^{[1
]}

Pillai, Uma Thanu Subramonia ^{[1
]}

Srinivasan, Amirthalingam ^{[1
]}

Pai, Bellambettu Chandrasekhara ^{[1
]}

机构：

[1] CSIR, NIIST, Div Mat Sci & Technol, Trivandrum 695019, Kerala, India

来源：

ADVANCED ENGINEERING MATERIALS | 2016年 / 18卷 / 05期

关键词：

QUASI-CRYSTALLINE PHASE; ALPHA-MN PRECIPITATION; HIGH-TEMPERATURE CREEP; GRAIN-BOUNDARY; MAGNESIUM ALLOY; MICROSTRUCTURAL EVOLUTION; DEFORMATION MECHANISMS; DISLOCATION CLIMB; DIFFUSION CREEP; ZN ALLOYS;

D O I：

10.1002/adem.201500393

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnesium being the lightest structural material, is being increasingly used in automotive industry but at elevated temperatures, alloys like AZ91D, AM60B, AM50A etc. exhibit poor creep resistance which hinders the powertrain applications. This article summarizes the various creep deformation mechanisms prevailing in magnesium alloys at elevated temperatures by the influence of elemental additions. The main creep mechanisms are found to be dislocation climb, diffusion creep, and grain boundary sliding. The variation of creep mechanisms for different Mg alloys with respect to the activation energy (Q), stress exponent (n) for different stresses and temperatures are reported.

引用

页码：770 / 794

页数：25

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