The formation of bimodal grain size distribution in Al-Mg-Si-Cu alloy and its effect on the formability
The formation of bimodal grain size distribution in Al-Mg-Si-Cu alloy and its effect on the formability
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Al-Mg-Si-Cu合金双峰晶粒尺寸分布的形成及其对成形性能的影响
DOI：
10.1016/j.matchar.2017.08.013
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发表时间：
2017-10-01
影响因子：
4.7
通讯作者：
Zhuang, L. Z.
中科院分区：
文献类型：
--
作者：
Guo, M. X.;Zhu, J.;Zhuang, L. Z.
Al-Mg-Si-Cu合金中双峰晶粒尺寸分布的形成及其对形成性的影响已经通过微结构和属性表征和建模来研究。结果表明，开发双峰微观结构的一种有吸引力的方法可用于改善Al-Mg-Si-Cu合金的形成性，其中质地也可以削弱。机械性能测试表明，可以在合金中获得外形和各向异性的改善，即（r）bar = 0.623，delta r = 0.012，具有粗晶粒的双峰微结构，这使得这使得这使该自动驾驶量具有很高的希望。此外，根据微观结构的演化和断裂形态，本文提出了双峰微结构的形成机理和Al-Mg-Si-Cu合金的变形机制。
The formation of bimodal grain size distribution in Al-Mg-Si-Cu alloy and its effect on the formability have been studied by microstructure and property characterization, and modelling. The results reveal that, an attractive way to develop the bimodal microstructure can be greatly used to improve the formability of Al-Mg-Si-Cu alloys, in which the texture can be also weakened. Mechanical properties tests revealed a great improvement in both the formability and anisotropy, i.e. (r) over bar = 0.623, Delta r = 0.012, can be obtained in the alloy with the bimodal microstructure of coarse and fine grains, which makes this alloy much promising in automotive application. Additionally, according to the microstructure evolution and fracture morphology, both the forming mechanism of bimodal microstructure and deformation mechanism of the Al-Mg-Si-Cu alloys were put forward in this paper.