Interfacial microstructures and properties of aluminum alloys/galvanized low-carbon steel under high-pressure torsion

被引：30

作者：

Liu, Yang ^{[1
]}

Bian, Xiufang ^{[1
]}

Zhang, Kai ^{[1
]}

Yang, Chuncheng ^{[1
]}

Feng, Le ^{[1
]}

Kim, Hyoung Seop ^{[2
]}

Guo, Jing ^{[2
,3
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

[2] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea

[3] Shandong Agr Univ, Coll Mech & Elect Engn, Tai An 271018, Peoples R China

来源：

MATERIALS & DESIGN | 2014年 / 64卷

基金：

新加坡国家研究基金会; 中国国家自然科学基金;

关键词：

Aluminum alloys; Low-carbon steel; Hot-dipping; Interface; High pressure torsion; AL SYSTEM; IRON; DIFFUSION; ALLOY; STRENGTH; LASER; INTERLAYER; CASTINGS; STATE;

D O I：

10.1016/j.matdes.2014.07.053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new composite processing technology characterized by hot-dip Zn-Al alloy process was developed to achieve a sound metallurgical bonding between Al-7 wt% Si alloy (or pure Al) castings and low-carbon steel inserts, and the variations of microstructure and property of the bonding zone were investigated under high-pressure torsion (HPT). During hot-dipping in a Zn-2.2 wt% Al alloy bath, a thick Al5Fe2Znx phase layer was formed on the steel surface and retarded the formation of Fe-Zn compound layers, resulting in the formation of a dispersed Al3FeZnx phase in zinc coating. During the composite casting process, complex interface reactions were observed for the Al-Fe-Si-Zn (or Al-Fe-Zn) phases formation in the interfacial bonding zone of Al-Si alloy (or Al)/galvanized steel reaction couple. In addition, the results show that the HPT process generates a number of cracks in the Al-Fe phase layers (consisting of Al5Fe2 and Al3Fe phases) of the Al/aluminized steel interface. Unexpectedly, the Al/galvanized steel interface zone shows a good plastic property. Beside the Al/galvanized steel interface zone, the microhardnesses of both the interface zone and substrates increased after the HPT process. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：287 / 293

页数：7

共 39 条

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