Multidirectional forging of AZ91 magnesium alloy and its effects on microstructures and mechanical properties

被引：67
|
作者：
Nie, K. B. [1 ]
Deng, K. K. [1 ]
Wang, X. J. [2 ]
Xu, F. J. [1 ]
Wu, K. [2 ]
Zheng, M. Y. [2 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 624卷
基金：
中国国家自然科学基金;
关键词：
Multidirectional forging; AZ91; alloy; Microstructure; Mechanical properties; SEVERE PLASTIC-DEFORMATION; GRAIN-REFINEMENT; DYNAMIC RECRYSTALLIZATION; TENSILE PROPERTIES; HOT DEFORMATION; MG ALLOY; MATRIX COMPOSITES; BEHAVIOR; AZ31; SUPERPLASTICITY;
D O I：
10.1016/j.msea.2014.11.076
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
AZ91 alloy was subjected to multidirectional forging (MDF) and the relationship between microstructures and mechanical properties generated by MDF were investigated. The results showed that after 1 MDF pass grain size of the alloy decreased compared with as-cast alloy, and the amount of recrystallization grains increased when the MDF temperature increased from 250 degrees C to 400 degrees C. With increasing the MDF passes at 350 degrees C, grains of the alloy were gradually refined. A typical basal texture was obtained after 1 MDF pass, and then the basal pole scattered with the increase of MDF passes. Mg17Al12 phases were precipitated along grain boundaries during MDF, which could hinder the growth of recrystallization grains. Both tensile strength and elongation to failure of the alloy were significantly enhanced till 3 MDF passes with increasing the MDF passes. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：157 / 168
页数：12
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