Microstructures and mechanical properties of Mg-Ce-Zn-Zr wrought alloy
Tóm tắt
Microstructures and mechanical properties of Mg-2.0%Ce-0.7%Zn-0.7%Zr alloy were studied. The results of scanning electron microscopy show that Mg12Ce phase mainly distributes at the grain boundaries. The fine Mg12Ce phase can apparently elevate recrystallization temperature by preventing the grain boundary migration. No dynamic recrystallization occurs during the hot-extrusion. The mechanical properties of as extruded specimens are σ
b=278.5 MPa, δ=12.0%, while those of the specimens annealed at 250 °C for 100 h are σ
b=272.6 MPa, δ=11.3%, which indicate that the alloy has good mechanical properties at room temperature.
Tài liệu tham khảo
Matucha K H. Structure and Properties of Nonferrous Alloys[M]. Translator: DING Dao-yun. Beijing: Science Press, 1999. 108–118. (in Chinese)
Mordike B L, Ebert T. Magnesium properties application potential[J]. Materials Science and Engineering A, 2001, 302(1): 37–45.
Taniuchi H, Watanabe H, Okumura H, et al. Microstructures and tensile properties of Mg-Zn-Y alloys containing quasicrystals[J]. Materials Science Forum, 2003, 419–422: 255–260.
GUO Xue-feng, WEI Jian-feng, ZHANG Zhong-ming. Review on magnesium alloys and super-high strength magnesium alloy[J]. Foundry Technology, 2002, 23(3): 133–136. (in Chinese)
YU Kun, LI Wen-xian, LI Song-rui. The research and developments of wrought magnesium alloy [J]. Light Alloy Process Technology, 2001, 29(7): 6–9. (in Chinese)
Aghion E, Bronfin B, Eliezer D. The role of the magnesium industry in protecting the environment [J]. Journal of Materials Processing Technology, 2001, 117(3): 381–385.
LÜ Yi-zhen, WANG Qu-dong, ZENG Xiao-qin, et al. Effect of rare earths on the microstructure, properties and fracture behavior of Mg-Al alloys[J]. Materials Science and Engineering A, 2000, 278(1): 66–76.
YU Kun, LI Wen-xian, ZHAO Jun, et al. Plastic deformation behaviors of a Mg-Ce-Zn-Zr alloy[J]. Scripta Materialia, 2003, 48(9): 1319–1323.
Luo A, Pekguleryuz M O. Review cast magnesium alloys for elevated temperature applications[J]. Journal of Materials Science, 1994, 29(20): 5259–5271.
Polmear I J. Magnesium alloys and application[J]. Materials Science and Technology, 1994, 10(1): 1–14.
Polmear I J. Light Alloys[M]. Translator: CHEN Chang-qi, ZOU Yu. Beijing: Defence Industry Press. 1981. (in Chinese)
Bettle C J, Venkatesan, Nie J F. Microstructure and mechanical properties of MEZ casting alloy[J]. Materials Science Forum, 2003, 419–422: 273–278.
LIU Ying, LI Yuan-yuan, ZHANG Wei-wen, et al. A review on the development and application of magnesium alloys[J]. Light Metal, 2002, (8): 56–61. (in Chinese)
CUI Yue-xian, WANG Chang-li. Metal Fracture Analysis[M]. Harbin: Harbin Institute of Technology Press, 1998. (in Chinese)