Microstructure and corrosion properties of Mg-4Zn-2Gd-0.5Ca alloy influenced by multidirectional forging

被引：54

作者：

Cao, Fang-fang ^{[1
]}

Deng, Kun-kun ^{[1
]}

Nie, Kai-bo ^{[1
]}

Kang, Jin-wen ^{[1
]}

Niu, Hao-yi ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Shanxi Key Lab Adv Magnesium Based Mat, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 770卷

基金：

中国国家自然科学基金;

关键词：

Mg-4Zn-2Gd-05Ca alloy; Multidirectional forging; EIS; Corrosion resistance; Pitting corrosion; MG-CA ALLOYS; Y-ZR ALLOY; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; TENSILE PROPERTIES; ZN ALLOYS; IN-VITRO; BEHAVIOR; EXTRUSION; GD;

D O I：

10.1016/j.jallcom.2018.08.191

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The as-cast Mg-4Zn-2Gd-0.5Ca alloy mainly contained I phase and W phase, while the I phase dissolved into Mg substrate after homogenization treatment which improved the alloy's corrosion resistance. After the application of multidirectional forging (MDF), the grains were refined obviously accompanied with the precipitation of I phase. With the increasing pass of MDF, both the size of dynamic recrystallized grains and the amount of precipitated I phase increased. The corrosion resistance of Mg-4Zn-2Gd-0.5Ca alloy became worse after 1 pass of MDF as compared with the as-homogenizated condition because of the precipitation of I phase. Neverthless, the corrosion resistance of the as-MDFed Mg-4Zn-2Gd-0.5Ca alloy deteriorated with the increasing pass of MDF. As compared with grain refinement, the precipitated I phase is thought to play a main role on the corrosion behavior of Mg-4Zn-0.5Ca alloy. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：1208 / 1220

页数：13

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