Microstructure and Creep Property of As-Cast Mg-6Al-XSr(x=0, 2, 3) Alloys
The microstructure and creep property of as-cast Mg-6Al-xSr(x=0, 2,3) alloys were studied. Results showed that the branch-like Al4Sr phase is the main precipitating phase in these alloys containing Sr. Their secondary creep rates under the applied stress of 70MPa at 175°Cdecreased with the increasing in the content of Sr and reached the minimum value of 1.4×10-8s-1 in the Mg-6Al-3Sr alloy, which is one thirtieth of secondary creep rates of the Mg-6Al alloy. It was mainly attributed to Al4Sr, which effectively hindered the grain boundaries sliding and dislocation motion in the creep.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Y. F. Wu et al., "Microstructure and Creep Property of As-Cast Mg-6Al-XSr(x=0, 2, 3) Alloys", Advanced Materials Research, Vols. 284-286, pp. 1564-1567, 2011