Comparison of the effects of isothermal equal channel angular pressing and multi-directional forging on mechanical properties of AM60 magnesium alloy

被引：21

作者：

Salevati, M. A. ^{[1
]}

Akbaripanah, F. ^{[1
]}

Mahmudi, R. ^{[2
]}

Fekete, K. H. ^{[3
,4
]}

Heczel, A. ^{[5
]}

Gubicza, J. ^{[5
]}

机构：

[1] Malayer Univ, Fac Engn, Dept Mech Engn, Malayer, Iran

[2] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Tehran, Iran

[3] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, Prague, Czech Republic

[4] CAS, Nucl Phys Inst, Rez, Czech Republic

[5] Eotvos Lorand Univ Budapest, Dept Mat Phys, POB 32, H-1518 Budapest, Hungary

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 776卷

基金：

美国国家科学基金会;

关键词：

AM60; alloy; Equal channel angular pressing; Multi-directional forging; Microstructure; Mechanical properties; SEVERE PLASTIC-DEFORMATION; LOW-TEMPERATURE SUPERPLASTICITY; AZ31 MG ALLOY; GRAIN-REFINEMENT; MICROSTRUCTURAL EVOLUTION; TEXTURE; EXTRUSION; STRENGTH; BEHAVIOR; TENSILE;

D O I：

10.1016/j.msea.2020.139002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study investigates the correlation between the microstructure and the mechanical strength of AM60 magnesium alloy processed by equal channel angular pressing (ECAP) and multi-directional forging (MDF) at a constant temperature of 220 degrees C. The maximum number of passes was six for both severe plastic deformation (SPD) techniques. The minimum achievable grain size was similar to 1.9 mu m for ECAP while it was only similar to 2.7 mu m for MDF. Despite the monotonous reduction of the grain size, the yield and the ultimate tensile strength values decreased for high equivalent strains which was attributed to the decrease of the dislocation density. The maximum achievable strength was higher for ECAP than that for MDF mainly due to the higher dislocation density. Both ECAP and MDF processing led to an improvement of ductility. Based on the strength results, it is evident that the ECAP process is more effective in improving the mechanical properties of AM60 alloy at 220 degrees C, compared to the MDF process.

引用

页数：9