摘要
The effect of rolling and heat treatment on microstructure and mechanical properties of Mg3.5Y0.8Ca0.4Zr alloy was investigated. With the addition of 0.4Zr, the average grain size of the as-cast alloy was markedly refined to 5-10 μm. After hot rolling process, the grain size of Mg3.5Y0.8Ca0.4Zr alloy was refined further into 3-5 lain and the tensile strength was enhanced while the plasticity was degraded because the accumulation of rolling reduction increased the density oft-wins, and refined the grain structures. After the solution heat treatment at 743 K, the elongation of alloy was greatly enhanced from 3% to 17%.
The effect of rolling and heat treatment on microstructure and mechanical properties of Mg3.5Y0.8Ca0.4Zr alloy was investigated. With the addition of 0.4Zr, the average grain size of the as-cast alloy was markedly refined to 5-10 μm. After hot rolling process, the grain size of Mg3.5Y0.8Ca0.4Zr alloy was refined further into 3-5 lain and the tensile strength was enhanced while the plasticity was degraded because the accumulation of rolling reduction increased the density oft-wins, and refined the grain structures. After the solution heat treatment at 743 K, the elongation of alloy was greatly enhanced from 3% to 17%.
基金
supported by National Natural Science Foundation of China (50901048,51174143)
the Key Project of Chinese Ministry of Education(2012017)
the fund of the State Key Laboratory of Solidification Processing in NWPU (SKLSP201003)
Program for Changjiang Scholar and Innovative Research Team in University (IRT0972)
Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi
Natural Science Foundation of Shanxi (2010021022-5)
