Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 567, Issue -, Pages 82-88Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.03.064
Keywords
ZrAlSi phase; Morphology; Al-Si piston alloy; Mechanical properties
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Funding
- National Basic Research Program of China (973 Program) [2012CB825702]
- National Natural Science Foundation of China [51071097]
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It is investigated that the morphologies of ZrAlSi phase in Al-18Si-xZr alloys will evolve from flake-like to block-like with increasing Zr content and the precipitation of the ZrAlSi intermetallic decreases the volume fraction of primary Si phase. The effect of flake-like and block-like ZrAlSi phase on the microstructure and elevated-temperature mechanical properties of an Al-Si multicomponent piston alloy was also investigated. It was found that flake-like ZrAlSi particles lead to a decrease of 7.28%, 3.23% and 8.85% for the elevated-temperature tensile strength, elongation and yield strength of the piston alloy, respectively, whereas block-like particles cause an increase of 15.82%, 12.94% and 14.75%, respectively. Meanwhile, the linear expansion is almost unaffected. (C) 2013 Elsevier B. V. All rights reserved.
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