Pre-aging on early-age behavior and bake hardening response of an Al-0.90Mg-0.80Si-0.64Zn-0.23Cu alloy
详细信息 查看全文
- 作者：Lizhen Yan ; Zhihui Li ; lzh@grinm.com" class="auth_mail" title="E-mail the corresponding author ; yanlizhenttnm@163.com" class="auth_mail" title="E-mail the corresponding author ; Yong-an Zhang ; Baiqing Xiong ; Xiwu Li ; Hongwei Liu ; Shuhui Huang ; Hongwei Yan
- 关键词：Al-Mg-Si-Zn-Cu alloy ; Pre-aging ; Bake hardening response ; Atom probe tomography
- 刊名：Progress in Natural Science
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：26
- 期：4
- 页码：398-403
- 全文大小：2358 K
文摘
Pre-aging on early-age behavior and bake hardening response of an Al-0.90Mg-0.80Si-0.64Zn 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.