Microstructure and Mechanical Properties of an Mg-Zn-Zr Alloy Modified by Rare Earth of Erbium
The microstructures, mechanical properties, and formability of an Mg-1.5Zn-0.1Zr alloy with rare earth element of Erbium addition have been examined by using optical microscopy, scanning electron microscopy/energy dispersive X-ray spectroscopy, and thermal mechanical testing. The results showed that Erbium combined with Mg and impurity elements forming small particles dispersed on the matrix. Therm-mechanical simulation in the temperature range from 250℃ to 400℃ and strain rate from 0.1 to 1.0 indicated that the flow stress decreases with the increase of the temperature and the decrease of the strain rate. Sheet samples were prepared through ingot casting, hot rolling, cold rolling, and intermediate annealing. Remarkable grain size refinement was realized through recrystallization during the rolling process. Good combination of strength and ductility was achieved by applying intermediate annealing before the very last cold rolling. Further improvement of ductility and formability could be obtained by conducting proper heat treatment on the finishing cold-rolled sheets.
Wrought Magnesium Alloy Rare Earth Element Microstructures Mechanical properties Rolling
Jing Zhang Xufeng Zhang Fusheng Pan Chuanpu Liu Qubo He
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
国际会议
重庆
英文
810-814
2008-06-09（万方平台首次上网日期，不代表论文的发表时间）