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Microstructural Design for Enhanced Elevated Temperature Properties in Sand‐castable Magnesium Alloys
Author(s) -
Bettles C.J.,
Gibson M.A.
Publication year - 2003
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200310103
Subject(s) - microstructure , materials science , casting , creep , precipitation , magnesium , die casting , metallurgy , grain boundary , sand casting , grain size , composite material , mold , physics , meteorology
The low pressure and gravity casting processing techniques offer the component designer an opportunity to produce pieces with increased complexity over those able to be fabricated via the high pressure die casting route. The design of appropriate microstructures for the enhancement of elevated temperature properties is dependent on the chosen processing route, with the low pressure and gravity techniques allowing for post‐cast manipulation of the microstructure through heat treatment. There are competing microstructural requirements for strength and creep resistance in casting alloys, and the optimised microstructure must, of necessity, be a compromise. The contributions from solid solution strengthening, grain boundaries and precipitation processes are described, with particular reference to elevated temperature magnesium alloys.