WE43镁合金的热变形行为及热加工图
Hot Deformation Behavior and Processing Map of WE43 Magnesium Alloy
摘 要
在变形温度300~500℃、应变速率0.000 5~0.5 s-1下，采用Gleeble 3800型数控式热-力物理模拟试验机对WE43镁合金进行热压缩试验，研究了该合金的热变形行为，建立了真应变为0.6时的热加工图，并结合显微组织演变确定WE43镁合金的最佳热加工工艺参数范围。结果表明：WE43镁合金的真应力随变形温度的降低或应变速率的增大而增大，峰值应力对应的真应变随应变速率的降低或变形温度的升高而减小；WE43镁合金最佳的热塑性加工区间为应变速率0.005~0.05 s-1、变形温度410~500℃，此时合金的热变形软化机制主要为动态再结晶，晶粒尺寸较均匀，平均晶粒尺寸小于100 μm。
热压缩
热加工图
显微组织
动态再结晶
WE43 magnesium alloy
hot compression
processing map
microstructure
dynamic recrystallization
Abstract
The hot compression test of WE43 magnesium alloy at deformation temperature of 300-500 ℃ and strain rate of 0.000 5-0.5 s-1 was carried out on Gleeble 3800 numerical control thermo-mechanical physical simulator, and the hot deformation behavior of the alloy was investigated. The processing map at strain of 0.6 was established, and the optimum hot working parameter range for WE43 magnesium alloy was determined by combination with microstructure evolution. The results show that the true stress of WE43 magnesium alloy increased with decreasing deformation temperature or increasing strain rate, and the true strain corresponding to the peak stress decreased with decreaseing strain rate or increasing deformation temperature. The optimum thermoplastic working ranges for WE43 magnesium alloy were deformation temperature of 410-500 ℃ and strain rate of 0.05-0.005 s-1; at the same time, the hot deformation softening mechanism of the alloy was mainly dynamic recrystallization, and the grain size was relatively uniform with average grain size of less than 100 μm.
中图分类号 TG146.2 DOI 10.11973/jxgccl202107013
所属栏目 物理模拟与数值模拟
基金项目
收稿日期 2021/1/19
修改稿日期 2021/5/28
网络出版日期
作者单位点击查看
备注何维维(1982-),女,辽宁鞍山人,高级工程师,博士
引用该论文: HE Weiwei,CHEN Junzhou,HAO Min,DAI Shenglong. Hot Deformation Behavior and Processing Map of WE43 Magnesium Alloy[J]. Materials for mechancial engineering, 2021, 45(7): 69～74
何维维,陈军洲,郝敏,戴圣龙. WE43镁合金的热变形行为及热加工图[J]. 机械工程材料, 2021, 45(7): 69～74
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参考文献
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【2】LEONTIS T E. The properties of sand cast magnesium-rare earth alloys[J]. JOM, 1949, 1(12):968-983.
【3】LEONTIS T E. Effect of rare-earth metals on the properties of extruded magnesium[J]. JOM, 1951, 3(11):987-993.
【4】LEONTIS T E. Properties of magnesium-thorium and magnesium-thorium-cerium alloys[J]. JOM, 1952, 4(3):287-294.
【5】YAMAMOTO A S, ROSTOKER W. Partial phase diagram of the systems Mg-Th and Mg-Th-Zn[J]. Transactions of the American Society for Metals, 1958, 50:1-24.
【6】GIBSON E D, CARLSON O N. The yttrium-magnesium alloy system[J]. Transactions of the American Society for Metals, 1960, 52:1084-1096.
【7】SMITH J F, BAILEY D M, NOVOTNY D B, et al. Thermodynamics of formation of yttrium-magnesium intermediate phases[J]. Acta Metallurgica, 1965, 13(8):889-895.
【8】吴国华,张亮,丁文江. 镁合金液态精密成型研究进展[J]. 上海电力学院学报,2015,31(4):299-316. WU G H, ZHANG L, DING W J. Research progress on liquid precision forming of magnesium alloy[J]. Journal of Shanghai University of Electric Power, 2015, 31(4):299-316.
【9】余琨,黎文献,王日初,等. 轧制及热处理对WE43镁合金组织和性能的影响[J]. 材料热处理学报,2008,29(2):95-98. YU K, LI W X, WANG R C, et al. Effect of rolling and heat treatment on mechanical properties and microstructure of WE43 magnesium alloy[J]. Transactions of Materials and Heat Treatment, 2008, 29(2):95-98.
【10】JIANG H S, ZHENG M Y, QIAO X G, et al. Microstructure and mechanical properties of WE43 magnesium alloy fabricated by directchill casting[J], Materials Science and Engineering:A, 2017, 684:158-164.
【11】丁文江,彭立明,付彭怀,等. 高性能镁合金及其成形加工技术与应用研究进展[J]. 新材料产业,2008(2):58-63. DING W J, PENG L M, FU P H, et al. Research progress of high performance magnesium alloy and its forming technology and application[J]. Advanced Materials Industry, 2008(2):58-63.
【12】王艳丽,郭学锋,黄丹,等. 高性能变形镁合金研究进展及应用[J]. 热加工工艺,2011,40(18):11-14. WANG Y L, GUO X F, HUANG D, et al. Research progress of high-performance wrought magnesium alloy and its application[J]. Hot Working Technology, 2011, 40(18):11-14.
【13】李晔,张宝红,程眉,等. Mg-13Gd-4Y-2Zn-0.5Zr合金热压缩行为及晶粒尺寸的研究[J].热加工工艺,2019, 48(2):87-92. LI Y, ZHANG B H, CHENG M, et al. Research on hot compression behavior and grain size of Mg-13Gd-4Y-2Zn-0.5Zr alloy[J]. Hot Working Technology, 2019, 48(2):87-92.
【14】寇鑫,于建民,刘海军,等. Mg-13Gd-4Y-2Zn-0.5Zr合金形变软化行为及本构方程建立[J]. 锻压技术,2020,45(3):166-173. KOU X, YU J M, LIU H J, et al. Deformation softening behavior and establishment of constitutive model for Mg-13Gd-4Y-2Zn-0.5Zr alloy[J]. Forging & Stamping Technology, 2020, 45(3):166-173.
【15】PRASAD Y V R K,GEGEL H L,DORAIVELU S M,et al.Modeling of dynamic material behavior in hot deformation:Forging of Ti-6242[J].Metallurgical Transactions A,1984,15(10):1883-1892.
【16】朱云鹏,解品,金培鹏. Mg-5Sn-2.5Pb镁合金的热变形行为及加工图[J]. 材料热处理学报, 2017, 38(6):195-200. ZHU Y P, XIE P, JIN P P. Hot deformation behavior and processing map of Mg-5Sn-2.5Pb magnesium alloy[J]. Transactions of Materials and Heat Treatment, 2017, 38(6):195-200.
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