Pre-aging on early-age behavior and bake hardening response of an Al-0.90Mg-0.80Si-0.64Zn-0.23Cu alloy

被引：3

作者：

Lizhen Yan ^{[1
]}

Zhihui Li ^{[1
]}

Yong-an Zhang ^{[1
]}

Baiqing Xiong ^{[1
]}

Xiwu Li ^{[1
]}

Hongwei Liu ^{[1
]}

Shuhui Huang ^{[1
]}

Hongwei Yan ^{[1
]}

机构：

[1] State Key Laboratory for Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals

来源：

Progress in Natural Science:Materials International | 2016年 / 26卷 / 04期

关键词：

Al-Mg-Si-Zn-Cu alloy; Pre-aging; Bake hardening response; Atom probe tomography;

D O I：

暂无

中图分类号：

TG146.21 [];

学科分类号：

080502 ;

摘要：

Pre-aging on early-age behavior and bake hardening response of an Al-0.90Mg-0.80Si-0.64 Zn alloy was investigated by differential scanning calorimetry(DSC), high resolution transmission electron microscopy(HRTEM), 3-dimensional atom probe(3DAP), Erichsen test and tensile test. The results indicated that pre-aged alloy exhibited excellent formability and bake-hardening response, while bake hardening response was poor in samples with natural aging. Clustering behavior during natural aging was inhibited by pre-aging. Numerous GP zones formed in pre-aged samples. GP zones were the nuclei of β′′ precipitates or directly transformed β′′ phases during paint baking process. A large number of β′′ phases were observed in pre-aged samples after paint bake treatment. There was no sign to indicate that β′′phase precipitated in natural aged samples after bake hardening treatment.

引用

页码：398 / 403

页数：6

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