Observations of microstructural refinement in Mg–Al–Si alloys containing strontium
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Magnesium is the lightest of all metals used as the basis for constructional alloys. It finds applications in the automobile, aerospace, electronics industries as well as in household equipment . Various Mg alloys have been developed for different applications by alloying with major elements such as Al, Zn, Mn, Zr, RE, Y, etc depending on the specific requirement in properties. Among various Mg alloy systems Mg–Al alloy system such as AZ91 and AM60 are the most commercially used magnesium alloys. These alloys have good room temperature and foundry properties. However, the major problem in using these alloys is their inferior properties at high temperature, especially the creep properties at elevated temperature, which is due to the presence of the low melting point Mg17Al12 intermetallic phase . Alloying additions such as RE, Sb, Ca, etc. are normally made to improve the creep properties of these alloys. Silicon (Si) is one such important alloying element added to the Mg–Al...
KeywordsAZ91 Alloy Chinese Script Mg2Si Particle Mg17Al12 Phase Mg2Si Phase
The authors thank the CSIR, New Delhi, for its financial support to the first author to carry out the work.
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