Grain boundary engineering process for nano reinforced aluminum matrix composites

被引：8

作者：

Chen, Xiao-Hui ^{[1
,2
]}

Wang, Fahui ^{[1
]}

Zhang, Fayun ^{[1
]}

机构：

[1] Xinyu Univ, Sch New Energy Sci & Engn, Xinyu 338004, Peoples R China

[2] Tongling Univ, Coll Mech Engn, Tongling 244061, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 939卷

基金：

中国国家自然科学基金;

关键词：

Aluminum matrix composites; Alternated compression deformation; Grain boundary character; Twin structures; Properties; MECHANICAL-PROPERTIES; DEFORMATION TWINS; AL; RECRYSTALLIZATION; DISLOCATIONS; PLASTICITY; EVOLUTION; DYNAMICS;

D O I：

10.1016/j.jallcom.2023.168834

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It is challenging to obtain a balance of strength and ductility for alloys and their composites. They are expected to exhibit good comprehensive properties by adjusting the grain boundary character and/or in-troducing twin structures. However, for coarse grained aluminum with high stacking fault energies, twin structures are rarely found. In this study, a grain boundary engineering process was carried out on coarse grained aluminum containing nano-reinforcements via an alternated compression deformation, followed by an annealing treatment. The effects of the thermo-mechanical process and alloy elements on the mi-crostructures of the composites were analyzed. The mechanical properties and inter-granular corrosion properties of the composites were evaluated. Twin structures could be generated in these alloys. After thermo-mechanical process, the composites exhibited good plasticity as well as higher strength. A E3 twin boundary hindered inter-granular corrosion crack propagation. The formation mechanism of the twin structures and the strengthening mechanism are discussed.(c) 2023 Elsevier B.V. All rights reserved.

引用

页数：11

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