王健,李全安,陈晓亚,梅婉婉,陈培军,谭劲峰

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:龙门实验室
• 4:洛阳晟雅镁合金科技有限公司

摘要(Abstract)：

在300～400℃、0.003～1 s~(-1)变形条件下，采用Gleeble-1500型热模拟试验机对Mg-8Al-1Zn-1Y镁合金进行热压缩实验。依据加工硬化率曲线拐点特征构建了合金热变形过程中的动态再结晶临界应变模型，并根据临界条件构建了合金的动态再结晶动力学模型，并分析了不同变形条件对合金动态再结晶的影响。结果表明：变形温度和应变速率对Mg-8Al-1Zn-1Y镁合金的热变形行为有显著的影响，其流变曲线表现出典型的动态再结晶特征，并且提高变形温度和降低应变速率都将促进动态再结晶的发生；在本实验条件下，Mg-8Al-1Zn-1Y镁合金的加工硬化率曲线均具有拐点特征，得到了合金在变形温度为300～400℃及应变速率为0.003～1 s~(-1)条件下所对应的临界应变ε_c和峰值应变ε_p,并获得了合金临界应变模型和动态再结晶动力学模型，合金显微组织特征验证了所获得的临界应变模型和动态再结晶模型的准确性。

关键词(KeyWords)： Mg-8Al-1Zn-1Y合金;热压缩;动态再结晶动力学模型;临界应变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52201119);; 中原英才计划—中原青年拔尖人才(豫组通[2021]44号);; 河南省自然科学基金(222300420435)

作者(Author): 王健,李全安,陈晓亚,梅婉婉,陈培军,谭劲峰

DOI: 10.13289/j.issn.1009-6264.2022-0471

参考文献(References)：

• [1] Cao H X,Wu X Y,Liao H M,et al.Development of processing maps for AZ81E magnesium alloy[J].High Temperature Materials and Processes,2018,37(2):157-162.
• [2] Kotkunde N,Krishnamurthy H N,Singh S K,et al.Experimental and numerical investigations on hot deformation behavior and processing maps for ASS 304 and ASS 316[J].High Temperature Materials and Processes,2018,37(9/10):873-888.
• [3] Yu S L,Gao Y H,Liu C M,et al.Dynamic recrystallization behavior of Mg-Gd-Y-Zr alloy during hot compression[J].Materials Science Forum,2016,849:181-185.
• [4] Xu Y,Hu L X,Sun Y.Dynamic recrystallization kinetics of as-cast AZ91D alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(6):1683-1689.
• [5] Cai Y,Sun C Y,Li Y L,et al.Phase field modeling of discontinuous dynamic recrystallization in hot deformation of magnesium alloys[J].International Journal of Plasticity,2020,133:102773.
• [6] Poliak E I,Jonas J J.A one-parameter approach to determining the critical conditions for the initiation of dynamic recrystallization[J].Acta Materialia,1996,44(1):127-136.
• [7] Xia Y F,Liu Y Y,Mao Y P,et al.Determination of critical parameters for dynamic recrystallization in Ti-6Al-2Zr-1Mo-1V alloy[J].Transactions of Nonferrous Metals Society of China,2012,22(S3):668-672.
• [8] Wang Z G,Liu X,Xie F M,et al.Dynamic recrystallization behavior and critical strain of 51CrV4 high-strength spring steel during hot deformation[J].Journal of Operations Management,2018,10:2385-2391.
• [9] Yang Z Q,Liu Y,Tian B H,et al.Model of critical strain for dynamic recrystallization in 10%TiC/Cu-Al2O3 composite[J].Journal of Central South University,2014,21(11):4059-4065.
• [10] Shkatov V,Mazur I.Modeling the dynamic recrystallization and flow curves using the kinetics of static recrystallization[J].Materials,2019,12(18):3024.
• [11] Zhang J L,Zhang Y Q,Li H M,et al.Determination of critical dynamic recrystallization conditions and mechanism analysis of Ti600 high-temperature titanium alloy[J].Journal of Materials Engineering and Performance,2021,30(1):229-238.
• [12] Quan G Z,Shi Y,Wang Y X,et al.Constitutive modeling for the dynamic recrystallization evolution of AZ80 magnesium alloy based on stress-strain data[J].Materials Science and Engineering A,2011,528(28):8051-8059.
• [13] Wang Z T,Jiang J H,Liu X N,et al.Dynamics and kinematics models of dynamic recrystallization of AZ80 magnesium alloy during thermal deformation[J].Rare Metal Materials and Engineering,2019,48(7):2062-2067.
• [14] Lv B J,Peng J,Shi D W,et al.Constitutive modeling of dynamic recrystallization kinetics and processing maps of Mg-2.0Zn-0.3Zr alloy based on true stress-strain curves[J].Materials Science and Engineering A,2013,560:727-733.
• [15] 李晓燕，李兴林，郭非，等.镁合金再结晶织构及其调控研究进展[J].材料热处理学报，2020,41(9):17-29.LI Xiao-yan,LI Xing-lin,GUO Fei,et al.Research progress on recrystallization texture and its modification of magnesium alloys[J].Transactions of Materials and Heat Treatment,2020,41(9):17-29.
• [16] 李全，骆晓东，金朝阳.两种唯象型本构方程描述AZ80镁合金高温流动应力的比较研究[J].塑性工程学报，2020,27(10):130-138.LI Quan,LUO Xiao-dong,JIN Chao-yang.A comparative study of two phenomenological constitutive equations to describe high temperature flow stress of AZ80 magnesium alloy[J].Journal of Plasticity Engineering,2020,27(10):130-138.
• [17] Long J C,Xia Q X,Xiao G F,et al.Flow characterization of magnesium alloy ZK61 during hot deformation with improved constitutive equations and using activation energy maps[J].International Journal of Mechanical Sciences,2021,191:106069.
• [18] 王健，李全安，陈晓亚，等.AZ81-1Y镁合金热加工行为和本构方程构建[J].材料热处理学报，2022,43(2):143-151.WANG Jian,LI Quan-an,CHEN Xiao-ya,et al.Hot working behavior and constitutive equation construction of AZ81-1Y magnesium alloy[J].Transactions of Materials and Heat Treatment,2022,43(2):143-151.
• [19] Poliak E I,Jonas J J.Initiation of dynamic recrystallization in constant strain rate hot deformation[J].ISIJ International,2007,43(5):684-691.
• [20] 朱利敏，李全安，陈晓亚，等.Mg-8Gd-0.5Zr合金热压缩过程中动态再结晶行为[J].材料导报，2019,33(24):4117-4121.ZHU Li-min,LI Quan-an,CHEN Xiao-ya,et al.Dynamic recrystallization behavior of Mg-8Gd-0.5Zr alloy during hot compression deformation[J].Materials Reports,2019,33(24):4117-4121.
• [21] Wang L H,Yang B,Li Z Y,et al.Microstructure evolution and dynamic recrystallization model of extruded AZ41M magnesium alloy during hot deformation[J].Transactions of the Indian Institute of Metals,2021,74(11):2801-2810.
• [22] 欧阳德来，鲁世强，黄旭，等.TA15钛合金β区变形动态再结晶的临界条件[J].中国有色金属学报，2010,20(8):1539-1544.OUYANG De-lai,LU Shi-qiang,HUANG Xu,et al.Critical conditions of dynamic recrystallization during deformation of β area in TA15 titanium alloy[J].The Chinese Journal of Nonferrous Metals,2010,20(8):1539-1544.
• [23] 蔡志伟，陈拂晓，郭俊卿.AZ41M镁合金动态再结晶临界条件[J].中国有色金属学报，2015,25(9):2335-2341.CAI Zhi-wei,CHEN Fu-xiao,GUO Jun-qing.Critical conditions of dynamic recrystallization for AZ41M magnesium alloy[J].The Chinese Journal of Nonferrous Metals,2015,25(9):2335-2341.
• [24] Fan Z B,Lin X P,Dong Y,et al.Dynamic recrystallization kinetic of fine grained Mg-Zn-Y-Zr alloy solidified under high pressure[J].Journal of Rare Earths,2017,35(9):920-926.
• [25] Liu J,Cui Z,Ruan L.A new kinetics model of dynamic recrystallization for magnesium alloy AZ31B[J].Materials Science and Engineering A,2011,529:300-310.

文章评论(Comment)：