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Effects of processing parameters on hot deformation behavior and microstructure revolution of as-cast AZ31B magnesiumSalloy
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Collaborative Innovation Center of Taiyuan Heavy Machinery Equipment,Taiyuan University of Science and Technology

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    Abstract:

    In this paper, the effects of deformation temperature, strain rate and height reduction on hot deformation behavior and microstructure revolution of as-cast AZ31B magnesiumSalloy were researched in terms of hot compression tests. The results show that the peak stress decreases with the decreasing strain rate and increasing deformation temperature, and the main nucleation mechanism consists of initial grain boundary bulging nucleation, sub-grain rotation nucleation, twinning induced nucleation as well as continuous recrystallization. Moreover, the deformation temperature is below 400oC, the increase of temperature will beneficial to recrystallization and grain refinement, while as above 400oC, grain sizeSincreases rapidly. Furthermore, the deformation temperature is equal or lesser than 400oC, the lower strain rate of 0.1s-1 is more beneficial to the recrystallized grain refinement, while above 400oC, medium strain rate of 1s-1 is more advantageous. In addition, it is found that at higher temperature and lower strain rate, height reduction primarily affects the grain size, and at higher temperature and higher strain rate, height reduction primarily affects the dynamic recrystallization degree.

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[HUANG Qingxue, ZHU Yanchun, WANG Jianmei, MA Lifeng, HUANG Zhiquan, QIN Jianping. Effects of processing parameters on hot deformation behavior and microstructure revolution of as-cast AZ31B magnesiumSalloy[J]. Rare Metal Materials and Engineering,2019,48(1):263~268.]
DOI:10.12442/j. issn.1002-185X.20170363

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History
  • Received:May 03,2017
  • Revised:June 05,2017
  • Adopted:June 23,2017
  • Online: February 18,2019
  • Published: