周璇,王克鲁,鲁世强,李鑫,邱仟,王俊

• 1:南昌航空大学航空制造工程学院

摘要(Abstract)：

采用Gleeble-3800热模拟机进行等温恒应变速率压缩试验,研究了Ti2041合金的在650～900℃和0.001～1 s~(-1)条件下的热变形行为。基于实验数据,建立了Z参数Arrhenius本构模型,计算了变形激活能。结果表明:该合金对变形温度和应变速率敏感,流动应力值的大小会随着温度的升高而降低,随着应变速率的增大而增大。根据极性交互模型原理和动态材料模型原理,分别建立了PRM和Prasad加工图。利用光学显微镜观察不同变形条件下合金的组织,并将加工图的预测和组织相结合,得出Prasad加工图与变形后的组织更相符。所以,采用Prasad加工图来优化该合金的热加工工艺参数。得出最佳参数范围为:变形温度760～825℃,应变速率0.001～0.0032 s~(-1)和变形温度825～900℃,应变速率0.0056～0.056 s~(-1);失稳区的变形机制为局部流动和机械失稳,稳定区的变形机制为动态再结晶。

关键词(KeyWords)： Ti2041合金;热变形行为;本构模型;加工图;工艺参数优化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51464035)

作者(Author): 周璇,王克鲁,鲁世强,李鑫,邱仟,王俊

DOI: 10.13289/j.issn.1009-6264.2020-0186

参考文献(References)：

• [1] Williams J C,Starke Jr E A.Progress in structural materials for aerospace systems[J].Acta Materialia,2003,51(19):5775-5799.
• [2] Hao Y L,Li S J,Sun S Y,et al.Elastic deformation behaviour of Ti-24Nb-4Zr-7.9Sn for biomedical applications[J].Acta Biomaterialia,2007,3(2):277-286.
• [3] Banerjee D,Williams J C.Perspectives on titanium science and technology[J].Acta Materialia,2013,61(3):844-879.
• [4] Zhang J Y,Sun F,Hao Y L,et al.Influence of equiatomic Zr/Nb substitution on superelastic behavior of Ti-Nb-Zr alloy[J].Materials Science and Engineering A,2013,563:78-85.
• [5] 朱鸿昌,罗军明,朱知寿.TB17钛合金高温压缩变形行为[J].航空材料学报,2019,39(3):44-52.ZHU Hong-chang,LUO Jun-ming,ZHU Zhi-shou.High temperature compression deformation behavior of TB17 titanium alloy[J].Journal of Aeronautical Materials,2019,39(3):44-52.
• [6] 张思远,毛小南,戚运莲,等.β-CEZ钛合金的热变形行为及加工图[J].稀有金属材料与工程,2017,46(4):973-978.ZHANG Si-yuan,MAO Xiao-nan,QI Yun-lian,et al.Hot deformation behavior and processing map of β-CEZ titanium alloy[J].Rare Metal Materials and Engineering,2017,46(4):973-978.
• [7] 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 Yun-peng,XIE Pin,JIN Pei-peng.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.
• [8] 陈强,王克鲁,鲁世强,等.NiTi形状记忆合金热变形行为及加工图[J].精密成形工程,2017,9(1):47-52.CHEN Qiang,WANG Ke-lu,LU Shi-qiang,et al.Hot deformation behavior and processing maps of NiTi shape memory alloy[J].Journal of Netshape Forming Engineering,2017,9(1):47-52.
• [9] 吕维洁,韩远飞,孙相龙,等.颗粒增强钛基复合材料等温热变形与组织演化规律[J].精密成形工程,2017,9(4):12-16.Lü Wei-jie,HAN Yuan-fei,SUN Xiang-long,et al.Isothermal hot deformation and microstructural evolution of particulate reinforced titanium matrix composites[J].Journal of Netshape Forming Engineering,2017,9(4):12-16.
• [10] 徐雪峰,肖尧,刘琪,等.LF2M铝合金薄壁管材的热压缩变形行为及热加工图[J].材料热处理学报,2018,39(2):145-151.XU Xue-feng,XIAO Yao,LIU qi,et al.Hot compression deformation behavior and processing map of LF2M aluminum alloy thin-walled tube[J].Transactions of Materials and Heat Treatment,2018,39(2):145-151.
• [11] 袁大庆,董洪波,邹忠波,等.基于Murty判据的TB8钛合金加工图及变形区分析[J].材料热处理学报,2016,37(11):73-78.YUAN Da-qin,DONG Hong-bo,ZOU Zhong-bo,et al.Processing map and deformation zone analyses of TB8 titanium alloy based on Murty criterion[J].Transactions of Materials and Heat Treatment,2016,37(11):73-78.
• [12] 王志蒙,王玉辉,曹文全,等.GCr15轴承钢热变形行为及加工图[J].材料热处理学报,2017,38(1):191-197.WANG Zhi-meng,WANG Yu-hui,CAO Wen-quan,et al.Hot deformation behavior and processing maps of GCr15 bearing steel[J].Transactions of Materials and Heat Treatment,2017,38(1):191-197.
• [13] Zang Q H,Yu H S,Lee Y S,et al.Effects of initial microstructure on hot deformation behavior of Al-7.9Zn-2.7Mg-2.0Cu (wt%) alloy[J].Materials Characterization,2019,151:404-413.
• [14] Su Z X,Wan L,Sun C Y,et al.Hot deformation behavior of AZ80 magnesium alloy towards optimization of its hot workability[J].Materials Characterization,2016,122:90-97.
• [15] Zener C,Hollomon J H.Effect of strain rate upon plastic flow of steel[J].Journal of Applied Physics,1944,15(1):22-32.
• [16] Rajagopalachary T,Kutumbarao V V.Intrinsic hot workability map for a titanium alloy IMI685[J].Scripta Materialia,1996,35 (3):311-316.
• [17] Kutumarao V V,Rajagopalachary T.Recent developments in modeling the hot working behavior of metallic materials[J].Bulletin of Materials Science,1996,19(4):677-698
• [18] 李红英,刘洋,胡继东.ZA27合金的热变形及加工图[J].中国有色金属学报,2012,22(2):365-370.LI Hong-ying,LIU Yang,HU Ji-dong.Hot deformation and processing map of ZA27 alloy[J].The Chinese Journal of Nonferrous Metals,2012,22(2):365-370.
• [19] 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.

文章评论(Comment)：