Influence of deformation microstructure on the precipitation behaviors of an Al-4Mg-0.3Cu alloy

被引：16

作者：

Yang, Xiaohui ^{[1
]}

Li, Kai ^{[1
]}

An, Xianghai ^{[2
]}

Ni, Song ^{[1
]}

Wei, Weifeng ^{[1
]}

Du, Yong ^{[1
]}

Song, Min ^{[1
,3
]}

机构：

[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[2] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[3] Cent S Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷

基金：

中国国家自然科学基金;

关键词：

Al-Mg; Cu addition; Grain boundary; Precipitation; In-situ TEM; SEVERE PLASTIC-DEFORMATION; HIGH-PRESSURE TORSION; AL-ZN-MG; MECHANICAL-PROPERTIES; GRAIN-BOUNDARIES; HIGH-STRENGTH; CU ALLOY; S-PHASE; SEGREGATION; REFINEMENT;

D O I：

10.1016/j.jallcom.2016.11.073

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：

To provide insight into the effect of deformation microstructure on the precipitation behavior, an Al-4Mg-0.3Cu alloy was processed by high-pressure torsion followed by subsequent in-situ heating in a transmission electron microscope. Structural characterization revealed significant differences in the size, composition and spatial distribution of the precipitates in the alloy subjected to different strains. Different grain sizes led to various dislocation substructures and grain boundary volume fractions, which in turn governed precipitation behaviors. In addition, the composition of the precipitates along the grain boundaries varied with the grain size due to the change of the grain boundary volume fraction and diffusion behavior. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：2238 / 2245

页数：8

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