Improvement of mechanical properties of a cryorolled Al-Mg-Si alloy through warm rolling and aging

被引：56

作者：

Mei, L. ^{[1
]}

Chen, X. P. ^{[1
]}

Huang, G. J. ^{[1
]}

Liu, Q. ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Minist Educ, Int Joint Lab Light Alloys, Chongqing 400044, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 777卷

基金：

中国国家自然科学基金;

关键词：

Al-Mg-Si alloy; Cryorolling; Warm rolling; Precipitation; Mechanical properties; HIGH-STRENGTH; PRECIPITATION; BEHAVIOR; DUCTILITY; ALUMINUM; DEFORMATION;

D O I：

10.1016/j.jallcom.2018.11.012

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：

The Al-Mg-Si alloys with and without pre-aging treatment were subjected to cryorolling, warm rolling and subsequent aging. Mechanical behavior and microstructural evolution were investigated by tensile tests, differential scanning calorimetry, X-ray diffraction and transmission electron microscopy. Tensile results showed that the strength and ductility of the cryorolled alloy were simultaneously enhanced by warm rolling and aging. After final aging, the pre-aged alloy exhibited better combination of strength and ductility than the alloy without pre-aging. Microstructural results demonstrated that pre-aging treatment was beneficial for the formation of strengthening phases during warm rolling and final aging, which accounted for the improved strength. The presence of finely dispersed nano-precipitates as well as a decrease in dislocation density played an important role in good ductility. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：259 / 263

页数：5

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