Microstructure and Creep Property of As-Cast Mg-6Al-xNd (x=2,4,6) Alloys
The microstructure and creep property of as-cast Mg-6Al-xNd(x=2,4,6) alloys were studied in this paper. Results showed that the needle-like Al11Nd3 phase and polygonal Al2Nd phase are the main precipitates in these alloys containing Nd, and the weight fraction of the former is much more than that of the latter. Their secondary creep rates under the applied stress of 70MPa at 175°C decreased with the content of Nd increasing and reached the minimum value of 5.0×10-8s-1 in the Mg-6Al-6Nd alloy, which is one ninth of that of the Mg-6Al alloy. The improvement in creep property of these alloys containing Nd was mainly attributed to the needle-like Al11Nd3 phase, which hindered the grain boundaries sliding and dislocation motion effectively in the creep.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Y. F. Wu et al., "Microstructure and Creep Property of As-Cast Mg-6Al-xNd (x=2,4,6) Alloys", Advanced Materials Research, Vols. 146-147, pp. 1702-1707, 2011