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Microstructure and tensile properties of in situ Mg2Sip/AM60B composite prepared by thixoforging technology

Published online by Cambridge University Press:  29 February 2016

Suqing Zhang ,
Tijun Chen  and
Pubo Li
Suqing Zhang
Affiliation:
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, China
Tijun Chen*
Affiliation:
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, China
Pubo Li
Affiliation:
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu Province, China
*
a)Address all correspondence to this author. e-mail: chentj@lut.cn
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Abstract

The thixoforging technology has been proved as an effective method to fabricate the in situ Mg2Sip/AM60B composite with excellent performances. The effects of reheating temperature on microstructure and tensile properties have been investigated. The results indicate that the liquid amount, the solubility of Al in α-Mg particles, and the coarsening of the α-Mg particles are changed as the reheating temperature changes, and thus the subsequent solidification behavior and plastic deformation are thereby changed. The morphology of the Mg2Si particle also varies as the reheating temperature rises owing to partial remelting operating in the edges and corners of the particles. The best ultimate tensile strength and elongation of 209 MPa and 11.9% of the thixoforged composite, which are 93 and 138% higher than the traditional permanent mold casting respectively, are obtained under the reheating temperature of 600 °C.

Keywords

microstructurecompositefracture
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 6 , 28 March 2016 , pp. 783 - 796
Copyright
Copyright © Materials Research Society 2016 

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