不同热变形条件下Al-Zn-Mg-Cu包铝板的组织演变（英文）

发布时间：2018-04-24 01:40

本文选题：Al-Zn-Mg-Cu合金 + 包铝层　；参考：《Transactions of Nonferrous Metals Society of China》2017年08期

【摘要】：利用Gleeble-3500热模拟试验机对Al-Zn-Mg-Cu包铝板进行热变形,采用EBSD和XRD对不同变形条件下的Al-Zn-Mg-Cu基体和包铝层显微结构进行表征,其变形条件为变形量70%、温度380~450°C、应变速率0.1~30 s~(-1)。结果表明,变形温度、道次和变形速率直接影响样品的回复和再结晶过程,从而进一步影响其显微结构。在包铝层和Al-Zn-Mg-Cu基体中回复和再结晶的程度有所区别。较高的变形温度导致较高程度的再结晶以及较大的晶粒尺寸。在多道次变形中的停留时间内会发生静态再结晶。当应变速率低于10 s~(-1)时,随着应变速率的增大,出现较多细小的亚晶组织;然而,在30 s~(-1)的大应变速率条件下,试样在变形温度下停留时间较短,导致动态回复及再结晶程度受限。
[Abstract]:The thermal deformation of Al-Zn-Mg-Cu coated aluminum plate was made by Gleeble-3500 thermal simulation test machine. The microstructure of Al-Zn-Mg-Cu matrix and aluminum coating under different deformation conditions was characterized by EBSD and XRD. The deformation conditions were 70% deformation, 380~450 degree C, and 0.1~30 s~ (-1) at strain rate. The results showed that the deformation temperature, pass and deformation rate were direct. The recovery and recrystallization of the sample affect its microstructure further. The degree of recovery and recrystallization in the aluminum coating and the Al-Zn-Mg-Cu matrix is different. Higher deformation temperature leads to higher recrystallization and larger grain size. Static recrystallization will occur during the residence time in the multipass deformation. When the strain rate is less than 10 s~ (-1), with the increase of the strain rate, there are many fine subcrystalline structures. However, under the condition of the large strain rate of 30 s~ (-1), the retention time of the specimen at the deformation temperature is shorter, which leads to the limited degree of dynamic recovery and recrystallization.

【作者单位】：重庆大学材料科学与工程学院;中铝材料应用研究院有限公司苏州分公司;
【基金】：Projects(2016YFB0300901,2016YFB0700401) supported by the National Key Research and Development Program of China Projects(106112015CDJXY130003,106112015CDJXZ138803) supported by the Fundamental Research Funds for the Central Universities,China
【分类号】：TG146.21

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