温度对TB6钛合金动态压缩性能的影响
|
摘要
利用分离式高温Hopkinson压杆试验系统,对TB6钛合金在不同温度(550～850℃)下的动态冲击压缩力学性能进行测试,研究环境温度对试验材料在高应变率下的应力-应变行为和绝热剪切带生成机制的影响。试验结果表明,在高应变率条件下,随着温度的升高,绝热升温热软化作用增强,材料表现出较强的应变率增塑效应和一定程度的应变率增强效应。同时发现,材料在650～750℃表现出较强的绝热剪切敏感性,承载时间越长,剪切带长度越长。材料在750℃时,剪切带出现分叉,导致材料强度异常降低。随着环境温度的增加,剪切断口韧窝面积增大,韧窝数量增加,材料塑性增强。
Through high temperature separate Hopkinson press bar test system,the dynamic impact compression mechanical properties of TB6 titanium alloy at different temperatures( 550-850 ℃) were tested. The influence of environment temperature on stress-strain behavior of test material at high strain rate and the formation mechanism of adiabatic shear band was studied. The experimental results show that under the condition of high strain rate,with the increase of temperature,the thermal softening effect of adiabatic heating is enhanced,the material shows a greater strain rate plasticizing effect and a certain degree of strain rate enhancement effect. Meanwhile,the material shows strong adiabatic shear sensitivity at 650-750 ℃. The longer the load time is,the longer the shear band length is. Shear band bifurcation may lead to abnormal material strength decreasing at 750 ℃. With the increase of environment temperature,the shear fracture dimple area increases,the number of dimple increases,and the plasticity of the material increases.
Through high temperature separate Hopkinson press bar test system,the dynamic impact compression mechanical properties of TB6 titanium alloy at different temperatures( 550-850 ℃) were tested. The influence of environment temperature on stress-strain behavior of test material at high strain rate and the formation mechanism of adiabatic shear band was studied. The experimental results show that under the condition of high strain rate,with the increase of temperature,the thermal softening effect of adiabatic heating is enhanced,the material shows a greater strain rate plasticizing effect and a certain degree of strain rate enhancement effect. Meanwhile,the material shows strong adiabatic shear sensitivity at 650-750 ℃. The longer the load time is,the longer the shear band length is. Shear band bifurcation may lead to abnormal material strength decreasing at 750 ℃. With the increase of environment temperature,the shear fracture dimple area increases,the number of dimple increases,and the plasticity of the material increases.
引文
[1]毛小南,赵永庆,杨冠军.国外航空发动机用钛合金的发展现状[J].稀有金属快报,2007,26(5):1-7.MAO Xiaonan,ZHAO Yongqing,YANG Guanjun.The development status of titanium alloys for foreign aviation engines[J].Rare Metal Bulletin,2007,26(5):1-7.
[2]杨冬雨,付艳艳,惠松骁,等.高强高韧钛合金研究与应用进展[J].稀有金属,2011,35(4):575-580.YANG Dongyu,FU Yanyan,HUI Songxiao,et al.Research and application of high strength and high toughness titanium alloys[J].Chinese Journal of Rare Metals,2011,35(4):575-580.
[3]BOYER R R,ROSENBERG H W.Collected works ofβtitanium alloys[M].Beijing:Beijing Institute of Aeronautical Materials,1988.
[4]BOYER R R,BRIGGS R D.The use ofβtitanium alloys in the aerospace industry[J].Journal of Materials Engineering&Performance,2005,14(6):681-685.
[5]倪沛彤,韩明臣,朱梅生,等.热处理制度对TB2钛合金带材力学性能及显微组织的影响[J].钛工业进展,2013,29(6):19-21.NI Peitong,HAN Mingchen,ZHU Meisheng,et al.Effect of heat treatment on microstructures and mechanical properties of TB2 alloy strip[J].Titanium Industrial Process,2013,29(6):19-21.
[6]于辉,刘帅帅,刘利刚,等.TA17钛合金热力学行为及加工特性研究[J].稀有金属,2017,41(1):1-7.YU Hui,LIU Shuaishuai,LIU Ligang,et al.Hot mechanical behavior and deformability of TA17 titanium alloy[J].Chinese Journal of Rare Metals,2017,41(1):1-7.
[7]曾卫东,周义刚.冷速对TC11合金β加工显微组织和力学性能的影响[J].金属学报,2002,38(12):1273-1276.ZENG Weidong,ZHOU Yigang.Influence of cooling rate on microstructure and mechanical properties of beta processed TC11 alloy[J].Acta Metallurgical Sinica,2002,38(12):1273-1276.
[8]尹仁锟,王庆娟,高颀,等.热处理对新型β钛合金组织与性能的影响[J].稀有金属,2016,40(1):415-420.YIN Renkun,WANG Qingjuan,GAO Qi,et al.Microstructure and mechanical properties of new beta titanium alloy with heat treatment[J].Chinese Journal of Rare Metals,2016,40(1):415-420.
[9]LEI L M,HUANG X,WANG M M,et al.Effect of hot compressive deformation on the marten site transformation of Ti-10V-2Fe-3Al titanium alloy[J].Materials Science and Engineering A,2011,530(1):591-601.
[10]LIU W,ZHANG Z,HUI S X.Study on mar-contain properties of TB10 alloy[J].Rare Metal Material and Engineering,2005,34(10):383-388.
[11]陈志永,才鸿年,王富耻,等.热轧TB2钛合金织构多晶板动态压缩性能的各向异性[J].稀有金属材料与工程,2011,39(12):2101-2106.CHEN Zhiyong,CAI Hongnian,WANG Fuchi,et al.Anisotropy of dynamic compressive properties of textured polycrystal sheet of hot rolled TB2 titanium alloy[J].Rare Metal Materials and Engineering,2011,39(12):2101-2106.
[12]王丁,王琳,代华湘,等.钛合金动态力学性能及绝热剪切敏感性研究[J].兵器材料科学与工程,2016,39(5):19-22.WANG Ding,WANG Lin,DAI Huaxiang,et al.Dynamic properties and adiabatic shear sensitivity of TB2 titanium alloy[J].Ordnance Materials Science and Engineering,2016,39(5):19-22.
[13]陈国定,王涛,程凤军.TB6钛合金材料本构关系的试验研究[J].机械科学与技术,2013,32(2):157-159.CHEN Guoding,WANG Tao,CHENG Fengjun.Experimental study of the constitutive relationship of TB6 titanium alloy[J].Mechanical Science and Technology for Aerospace Engineering,2013,32(2):157-159.
[14]崔军辉,杨合,孙志超.TB6钛合金热变形行为及本构模型研究[J].稀有金属材料与工程,2012,41(7):1166-1170.CUI Junhui,YANG He,SUN Zhichao.Research on hot deformation behavior and constitutive model of titanium alloy TB6[J].Rare Metal Materials and Engineering,2012,41(7):1166-1170.
[15]邱伟,鲁世强,欧阳德来.锻态TB6钛合金热变形行为及组织演变[J].塑性工程学报,2010,17(3):38-43.QIU Wei,LU Shiqiang,OUYANG Delai.Investigation on the hot temperature deformation behavior and microstructure evolution of forged titanium alloy TB6[J].Journal of Plasticity Engineering,2010,17(3):38-43.
[16]王礼立,王永刚.应力波在用SHPB研究材料动态本构特性中的重要作用[J].爆炸与冲击,2005,25(1):18-25.WANG Lili,WANG Yonggang.The important role of stress waves in the study on dynamic constitutive behavior of materials by SHPB[J].Explosion and Shock Waves,2005,25(1):18-25.
[2]杨冬雨,付艳艳,惠松骁,等.高强高韧钛合金研究与应用进展[J].稀有金属,2011,35(4):575-580.YANG Dongyu,FU Yanyan,HUI Songxiao,et al.Research and application of high strength and high toughness titanium alloys[J].Chinese Journal of Rare Metals,2011,35(4):575-580.
[3]BOYER R R,ROSENBERG H W.Collected works ofβtitanium alloys[M].Beijing:Beijing Institute of Aeronautical Materials,1988.
[4]BOYER R R,BRIGGS R D.The use ofβtitanium alloys in the aerospace industry[J].Journal of Materials Engineering&Performance,2005,14(6):681-685.
[5]倪沛彤,韩明臣,朱梅生,等.热处理制度对TB2钛合金带材力学性能及显微组织的影响[J].钛工业进展,2013,29(6):19-21.NI Peitong,HAN Mingchen,ZHU Meisheng,et al.Effect of heat treatment on microstructures and mechanical properties of TB2 alloy strip[J].Titanium Industrial Process,2013,29(6):19-21.
[6]于辉,刘帅帅,刘利刚,等.TA17钛合金热力学行为及加工特性研究[J].稀有金属,2017,41(1):1-7.YU Hui,LIU Shuaishuai,LIU Ligang,et al.Hot mechanical behavior and deformability of TA17 titanium alloy[J].Chinese Journal of Rare Metals,2017,41(1):1-7.
[7]曾卫东,周义刚.冷速对TC11合金β加工显微组织和力学性能的影响[J].金属学报,2002,38(12):1273-1276.ZENG Weidong,ZHOU Yigang.Influence of cooling rate on microstructure and mechanical properties of beta processed TC11 alloy[J].Acta Metallurgical Sinica,2002,38(12):1273-1276.
[8]尹仁锟,王庆娟,高颀,等.热处理对新型β钛合金组织与性能的影响[J].稀有金属,2016,40(1):415-420.YIN Renkun,WANG Qingjuan,GAO Qi,et al.Microstructure and mechanical properties of new beta titanium alloy with heat treatment[J].Chinese Journal of Rare Metals,2016,40(1):415-420.
[9]LEI L M,HUANG X,WANG M M,et al.Effect of hot compressive deformation on the marten site transformation of Ti-10V-2Fe-3Al titanium alloy[J].Materials Science and Engineering A,2011,530(1):591-601.
[10]LIU W,ZHANG Z,HUI S X.Study on mar-contain properties of TB10 alloy[J].Rare Metal Material and Engineering,2005,34(10):383-388.
[11]陈志永,才鸿年,王富耻,等.热轧TB2钛合金织构多晶板动态压缩性能的各向异性[J].稀有金属材料与工程,2011,39(12):2101-2106.CHEN Zhiyong,CAI Hongnian,WANG Fuchi,et al.Anisotropy of dynamic compressive properties of textured polycrystal sheet of hot rolled TB2 titanium alloy[J].Rare Metal Materials and Engineering,2011,39(12):2101-2106.
[12]王丁,王琳,代华湘,等.钛合金动态力学性能及绝热剪切敏感性研究[J].兵器材料科学与工程,2016,39(5):19-22.WANG Ding,WANG Lin,DAI Huaxiang,et al.Dynamic properties and adiabatic shear sensitivity of TB2 titanium alloy[J].Ordnance Materials Science and Engineering,2016,39(5):19-22.
[13]陈国定,王涛,程凤军.TB6钛合金材料本构关系的试验研究[J].机械科学与技术,2013,32(2):157-159.CHEN Guoding,WANG Tao,CHENG Fengjun.Experimental study of the constitutive relationship of TB6 titanium alloy[J].Mechanical Science and Technology for Aerospace Engineering,2013,32(2):157-159.
[14]崔军辉,杨合,孙志超.TB6钛合金热变形行为及本构模型研究[J].稀有金属材料与工程,2012,41(7):1166-1170.CUI Junhui,YANG He,SUN Zhichao.Research on hot deformation behavior and constitutive model of titanium alloy TB6[J].Rare Metal Materials and Engineering,2012,41(7):1166-1170.
[15]邱伟,鲁世强,欧阳德来.锻态TB6钛合金热变形行为及组织演变[J].塑性工程学报,2010,17(3):38-43.QIU Wei,LU Shiqiang,OUYANG Delai.Investigation on the hot temperature deformation behavior and microstructure evolution of forged titanium alloy TB6[J].Journal of Plasticity Engineering,2010,17(3):38-43.
[16]王礼立,王永刚.应力波在用SHPB研究材料动态本构特性中的重要作用[J].爆炸与冲击,2005,25(1):18-25.WANG Lili,WANG Yonggang.The important role of stress waves in the study on dynamic constitutive behavior of materials by SHPB[J].Explosion and Shock Waves,2005,25(1):18-25.