Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 2    February 2015

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Tensile properties and hot extrusion behavior of ZnO-coated Mg2B2O5w/6061 Al composites
Feng-yuan CHEN1, Bin-bin TANG1, Pei-peng JIN1, Lei ZHANG2, Wei-dong FEI1,2

1. School of Mechanical Engineering, Qinghai University, Xining 810016, China;
2. School of Materials and Engineering, Harbin Institute of Technology, Harbin 150001, China

Abstract:The 6061 aluminum matrix composites reinforced with ZnO-coated Mg2B2O5w were fabricated by squeeze casting method and followed by extruded under a technical equivalent condition. The mechanical properties and microstructures of the composites were investigated. The results showed that the elastic modulus of the as-cast composites increased straightly with increasing ZnO coating content. The ultimate tensile strength and yield strength of the as-cast composites rapidly increased initially and then declined with increasing ZnO coating content. However, the elongations of all the as-cast composites had similar values. The elongations of the composites were highly enhanced and the ultimate tensile strength of the composite without ZnO coating was the largest after extrusion. A number of whiskers in the composites with ZnO coating were fractured during the extrusion process, but the whiskers’ breakage extent was limited with the increase of coating content.

 

Key words: aluminum matrix composites; Mg2B2O5 whisker; coating; extrusion; mechanical properties

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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