4.5 Article

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

期刊

JOURNAL OF MATERIALS RESEARCH
卷 31, 期 6, 页码 783-796

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CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2016.69

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资金

  1. National Basic Research Program of China [G2010CB635106]
  2. Program for New Century Excellent Talents in University of China [NCET-10-0023]
  3. Program for Hongliu Outstanding Talents of Lanzhou University of Technology

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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 alpha-Mg particles, and the coarsening of the alpha-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 degrees C.

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