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黄庆学,朱艳春,王建梅,马立峰,黄志权,秦建平.加工参数对铸态AZ31B镁合金热变形行为及组织演变的影响[J].稀有金属材料与工程(英文),2019,48(1):263~268.[HUANG Qingxue,ZHU Yanchun,WANG Jianmei,MA Lifeng,HUANG Zhiquan and 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.]
Effects of processing parameters on hot deformation behavior and microstructure revolution of as-cast AZ31B magnesiumSalloy
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Received:May 03, 2017  Revised:June 05, 2017
DOI:
Key words: As-cast AZ31B magnesiumSalloy  deformation parameters  flow behavior  microstructure revolution
Foundation item:国家自然科学基金资助项目(51501122, 51604181),晋城市科技计划项目(201501004-8),NSFC-山西煤基低碳联合基金(U1510131),山西省重点研发计划(201603D121010),山西省“青年三晋学者”计划,山西省青年科技研究基金项目(201601D021095)
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HUANG Qingxue,ZHU Yanchun,WANG Jianmei,MA Lifeng,HUANG Zhiquan and QIN Jianping  
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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.