Modification of Eutectic Si in Al-Si-(Ba) Alloy by Inducing a Novel 9R Structure in Twins.

Modification of Eutectic Si in Al-Si-(Ba) Alloy by Inducing a Novel 9R Structure in Twins.
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通过诱导新型 9R 孪晶结构对 Al-Si-(Ba) 合金中的共晶 Si 进行改性

DOI:
10.3390/ma11071151
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发表时间:
2018-07-06
期刊:
Materials (Basel, Switzerland)
影响因子:
--
通讯作者:
Zhou H
Zhou H
中科院分区:
其他
文献类型:
--
作者:
Sha X;Chen X;Ning H;Xiao L;Yin D;Mao L;Zheng J;Zhou H

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在工业应用广泛的铝硅合金中,孪晶形态的改变对合金的变质处理起着重要的作用。然而,对这一变化的解释仍然不够。利用高分辨透射电子显微镜(HRTEM)研究了两种不同Ba含量的Al-Si合金中孪晶的显微组织。与无钡合金中存在的正常{111}孪晶不同,含钡合金中观察到不连续孪晶和多重孪晶。此外,在Al-Si合金中,在不连续孪晶转折处和多孪晶相交处首次观察到孪晶解离形成的9 R结构。
The change of twinning morphology plays an important role in the modification of Al-Si alloys, which are widely used in industrial applications. However, the interpretation of this change is still insufficient. In this work, the microstructure of twins was investigated in two kinds of Al-Si alloys with different additions of Ba using high-resolution transmission electron microscopy (HRTEM). Unlike the normal {111} twin that exists in Ba-free alloy, discontinuous twins and multiple twins were observed in the Ba-containing alloy. In addition, the 9R structure formed by the dissociation of twins was firstly observed at the turning of discontinuous twins and the intersection of multiple twins in Al-Si alloys.
DOI: 10.1007/s12666-014-0399-2
发表时间: 2014-10-01
影响因子: 1.6
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