期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2005.09.026
关键词
semi solid; SSM ductility; T-5 ductility; SSM microstructure
The semi-solid process produces globular instead of dendritic alpha phase and extraordinarily fine fibrous aluminum-silicon eutectic structure, which apparently enables exceptionally high ductility, even when casting copper-containing and secondary alloys that would normally have limited ductility. Contrary to the experience with liquid cast products of the same alloys, semi-solid products can be given a T-5 heat treatment without loss of ductility, a significant advantage in terms of dimensional controls and treatment costs. This paper will describe solidification events that lead to the unique alpha aluminum, eutectic aluminum-silicon and secondary phase structures of semi-solid products and provide evidence to date that it is these unique characteristics that are responsible for exceptional ductility, especially in the T-5 temper. (c) 2005 Elsevier B.V. All rights reserved.
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