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Advances in Materials Science and Engineering
Volume 2018 (2018), Article ID 1989754, 7 pages
https://doi.org/10.1155/2018/1989754
Research Article

Effect of Powder Size on Microstructure and Mechanical Properties of 2A12Al Compacts Fabricated by Hot Isostatic Pressing

1School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
2Institute for Problems in Mechanics, Russian Academy of Sciences, Moscow 119526, Russia

Correspondence should be addressed to Xina Huang; moc.621@anixgnauh

Received 8 December 2017; Revised 11 February 2018; Accepted 27 February 2018; Published 27 March 2018

Academic Editor: Hongchao Kou

Copyright © 2018 Xina Huang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper studied the effects of powder size on densification, microstructure, and mechanical properties of the hot isostatic-pressed 2A12 aluminum alloy powder compact. The results show that the near-fully dense powder compact can be successfully achieved and the smaller the powder is, the higher the relative density is. In addition, as the powder size decreases, the precipitated phases in the powder compact change from continuously point-like distribution at the junctions among powder particles to the concentrated distribution at the three-way intersections. Compared with the large powder, the tensile strength, yield strength, and elongation of the compact with the small powder were improved by 14%, 30.8%, and 48.6%, respectively.