Abstract
There are many researches on the deformation behavior of wrought magnesium alloys, such as AZ31, AZ80, AZ91, and ZK60 magnesium alloys at different temperatures and strain rates, but few of them focuses on the deformation behavior of AZ41M and ZK60M alloys, especially under the twin-roll casting (TRC) state. Meanwhile, the existing researches only focus on the grain refinement law of the magnesium alloys under deformation conditions, the deformation mechanism has not been revealed yet. The hot compression behavior of AZ41M and ZK60M magnesium alloys under the temperature and strain rate ranges of 250–400 °C and 0.001–1 s−1 are studied by thermal simulation methods using Gleeble 1500 machine and virtual simulation using finite element analysis software. Simulation results show that sine hyperbolic law is the most suitable flow stress model for wider deformation conditions. The most reasonable selected deformation conditions of ZK60M alloy is 350 °C/0.1 s−1 for TRC and 350 °C/1 s−1 for conventional casting (CC), while AZ41M alloy is 300 °C/0.01 s−1 for TRC and 350 °C/0.1 s−1 for CC. Deformation behavior and dynamic recrystallization (DRX) mechanism of them are analyzed at the same deformation conditions. The microstructures of AZ41M and ZK60M alloys are observed at different deformed conditions by optical microscopy (OM) and electron back scatter diffraction (EBSD) and it reveals the flow behavior and deformation mechanism of them. Working harden and work soften contribute to the activation of basal, non-basal slip systems which promote DRX. The proposed research reveals the deformation behavior and mechanism of the AZ41M and ZK 60M magnesium alloys and concludes their optimized deformation parameters and processes and provides a theory basis for their manufacturing and application.
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This project is supported by National Natural Science Foundation of China (Grant No. U1134101), and Shandong Provincial Natural Science Foundation of China (Grant No. ZR2011EMM003)
WANG Shouren, born in 1966, is currently a professor at School of Mechanical Engineering, University of Jinan, China. He received his PhD degree from Shandong University, China, in 2007. His research interests include light metal, metal matrix composites and tribology.
SONG Linghui, born in 1986, is currently a master candidate at School of Mechanical Engineering, University of Jinan, China.
KANG Sukbong, born in 1952, is currently a professor at Korea Institute of Materials Science, Korea. He is famous in the research the field of wrought magnesium alloys, special in twin roll casting technology.
CHO Jaehyung, born in 1974, is currently an associate professor at Korea Institute of Materials Science, Korea. He received his PhD degree from Seoul University, Korea.
WANG Yingzi, born in 1976, is currently a laboratory technician at School of Materials Science and Engineering, University of Jinan, China.
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Wang, S., Song, L., Kang, S. et al. Deformation behavior and microstructure evolution of wrought magnesium alloys. Chin. J. Mech. Eng. 26, 437–447 (2013). https://doi.org/10.3901/CJME.2013.03.437
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DOI: https://doi.org/10.3901/CJME.2013.03.437