Microstructure and mechanical properties of SiCp/AZ91 composite processed with extrusion and EPT

被引：9

作者：

Wu, Hongfei ^{[1
]}

Shan, Zhaohui ^{[1
]}

Fan, Jianfeng ^{[1
,2
]}

Zhang, Qiang ^{[1
,2
]}

Deng, Kunkun ^{[1
,2
]}

Wu, Yucheng ^{[1
]}

Li, Weiguo ^{[1
]}

Dong, Hongbiao ^{[3
]}

Xu, Bingshe ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Peoples R China

[2] Shanxi Key Lab Adv Magnesium Based Mat, Taiyuan 030024, Peoples R China

[3] Univ Leicester, Dept Engn, Leicester, Leics, England

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2021年 / 37卷 / 03期

基金：

中国国家自然科学基金;

关键词：

SiCp; AZ91 magnesium matrix composite; hot extrusion; electrical pulse treatment; static recrystallisation; mechanical properties;

D O I：

10.1080/02670836.2021.1885579

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

By hot extrusion at 250 degrees C and electrical pulse treatment (EPT) of 40 mu s duration and 10 min processing time, a homogeneous matrix microstructure with an average grain size of 0.91 mu m and abundant Mg17Al12 phase was obtained in SiCp/AZ91 magnesium matrix composite. Moreover, SiCp were helpful to promote the accumulation of crystal defects and the precipitation of Mg17Al12 phase. After extrusion at 250 degrees C, the yield strength (YS) and ultimate tensile strength (UTS) of the composite reached 480 and 556 MPa, respectively. With the increase of the duration and the processing time, the YS and UTS of SiCp/AZ91 composite were reduced due to the softening effect of static recrystallisation but its tensile elongation to failure (TEF) was improved slightly.

引用

页码：269 / 279

页数：11

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