不同含量(TiC+TiB)对TC4合金组织和力学性能的影响
|
摘要
以Ti-6Al-4V(TC4)合金为基体,以TiC和TiB作为增强相,采用熔铸法制备不同体积分数增强相的钛基复合材料(TMCs),研究不同含量TiC、TiB对TC4组织与力学性能的影响。结果表明:随着增强相体积分数的提高,TiC、TiB衍射峰明显增强;α相层片的长度有所变短,层片的宽度也有一定的减小,且排列方向较不规则;TiB、TiC沿晶界分布,同时晶粒有细化的趋势。当增强相体积分数由0vol%增加到4vol%,复合材料的硬度升高,复合材料的抗压强度由1205 MPa增加到1602 MPa,提高了近400 MPa,但极限变形量有所降低,从24.5%降到16.7%,降低了约8%,即强度提高塑性降低。
Taking Ti-6Al-4V (TC4) alloy as matrix, and TiC and TiB as reinforcement, the titanium matrix composites (TMCs) with different volume fractions of reinforcement were prepared by melting-casting. The effects of TiC and TiB contents on the microstructure and mechanical properties of TMCs were studied. The results show that, the TiC and TiB diffraction peaks increase obviously with the increase of the volume fraction of the reinforcement. The length of α phase lamellar becomes shorter. The width of lamellar is also reduced, and the arrangement direction is relatively irregular. The reinforcement of TiB and TiC distribute along grain boundaries and the grain size tends to be refined. When the volume fraction of the reinforcing phase is increased from 0 vol% to 4 vol%, the hardness of the composites increases, and the compressive strength increases from 1205 MPa to 1602 MPa, which increases by nearly 400 MPa. However, the limit deformation decreases from 24.5% to 16.7%, which is decreased by 8%, that is, the strength increases and the plasticity decreases.
Taking Ti-6Al-4V (TC4) alloy as matrix, and TiC and TiB as reinforcement, the titanium matrix composites (TMCs) with different volume fractions of reinforcement were prepared by melting-casting. The effects of TiC and TiB contents on the microstructure and mechanical properties of TMCs were studied. The results show that, the TiC and TiB diffraction peaks increase obviously with the increase of the volume fraction of the reinforcement. The length of α phase lamellar becomes shorter. The width of lamellar is also reduced, and the arrangement direction is relatively irregular. The reinforcement of TiB and TiC distribute along grain boundaries and the grain size tends to be refined. When the volume fraction of the reinforcing phase is increased from 0 vol% to 4 vol%, the hardness of the composites increases, and the compressive strength increases from 1205 MPa to 1602 MPa, which increases by nearly 400 MPa. However, the limit deformation decreases from 24.5% to 16.7%, which is decreased by 8%, that is, the strength increases and the plasticity decreases.
引文
[1]黄陆军,耿林.非连续增强钛基复合材料研究进展[J].航空材料学报,2014,34(4):126-138.
[2]孙亮,董福宇,郑博文,等.热处理对IMI834钛基复合材料组织与性能的影响[J].热加工工艺,2018,47(6):146-150.
[3]郑博文,董福宇,张悦,等.TiC含量对原位钛基复合材料组织与摩擦性能的影响[J].特种铸造及有色合金,2018,38(7):705-708.
[4]曹秀中,韩秀全,赵冰,等.SiC纤维增强钛基复合材料研究现状与展望[J].航空制造技术,2014(22):109-112.
[5]赵永庆,周廉,Vassel A.SiC连续纤维增强钛基复合材料研究[J].稀有金属材料与工程,2003,32(3):161-163.
[6]Li B S,Shang J L,Guo J J,et al.Formation of TiBw reinforcement in in-situ titanium matrix composites[J].Journal of Materials Science,2004,39(3):1131-1133.
[7]Muneshwar P,Singh S K,Pant B,et al.Advanced processing techniques for titanium base alloys and its aluminides for space applications[J].Transactions of the Indian Institute of Metals,2008,61(2/3):77-85.
[8]Vassel A.Interface considerations in high-temperature titanium metal matrix composites[J].Journal of Microscopy,2010,185(2):303-309.
[9]Kennedy A R,Wyatt S M.The effect of processing on the mechanical properties and interfacial strength of aluminium/TiCMMCs[J].Composites Science&Technology,2000,60(2):307-314.
[10]Wanjara P,Wanjara P,Drew R A L,et al.Evidence for stable stoichiometric Ti2C at the interface in TiC particulate reinforced Ti alloy composites[J].Acta Materialia,2000,48(7):1443-1450.
[11]于兰兰,毛小南,张鹏省.TiC和TiB混杂增强钛基复合材料研究新进展[J].钛工业发展,2008,25(4):20-23.
[12]张茂胜.TiC+TiB增强高温钛合金基复合材料的组织和性能研究[D].哈尔滨:哈尔滨工业大学,2011.
[13]Filip R,Kubiak K,Ziaja W,et al.The effect of microstructure on the mechanical properties of two-phase titanium alloys[J].Journal of Materials Processing Technology,2003,133(1/2):84-89.
[14]Haibin C,Jianzhong F,Tao Z,et al.Microstructural characterization of TiB in-situ synthesized titanium matrix composites[J].Chinese Journal of Rare Metals,2006,30(6):808-812.
[15]Lu W J,Zhang D,Zhang X N,et al.Microstructure and tensile properties of in situ(TiB+TiC)/Ti6242(TiB∶TiC=1∶1)composites prepared by common casting technique[J].Materials Science&Engineering A,2001,311(1/2):142-150.
[16]吕维洁,杨志峰,张荻.原位合成钛基复合材料增强体TiC的微结构特征[J].中国有色金属学报,2002,12(3):511-515.
[2]孙亮,董福宇,郑博文,等.热处理对IMI834钛基复合材料组织与性能的影响[J].热加工工艺,2018,47(6):146-150.
[3]郑博文,董福宇,张悦,等.TiC含量对原位钛基复合材料组织与摩擦性能的影响[J].特种铸造及有色合金,2018,38(7):705-708.
[4]曹秀中,韩秀全,赵冰,等.SiC纤维增强钛基复合材料研究现状与展望[J].航空制造技术,2014(22):109-112.
[5]赵永庆,周廉,Vassel A.SiC连续纤维增强钛基复合材料研究[J].稀有金属材料与工程,2003,32(3):161-163.
[6]Li B S,Shang J L,Guo J J,et al.Formation of TiBw reinforcement in in-situ titanium matrix composites[J].Journal of Materials Science,2004,39(3):1131-1133.
[7]Muneshwar P,Singh S K,Pant B,et al.Advanced processing techniques for titanium base alloys and its aluminides for space applications[J].Transactions of the Indian Institute of Metals,2008,61(2/3):77-85.
[8]Vassel A.Interface considerations in high-temperature titanium metal matrix composites[J].Journal of Microscopy,2010,185(2):303-309.
[9]Kennedy A R,Wyatt S M.The effect of processing on the mechanical properties and interfacial strength of aluminium/TiCMMCs[J].Composites Science&Technology,2000,60(2):307-314.
[10]Wanjara P,Wanjara P,Drew R A L,et al.Evidence for stable stoichiometric Ti2C at the interface in TiC particulate reinforced Ti alloy composites[J].Acta Materialia,2000,48(7):1443-1450.
[11]于兰兰,毛小南,张鹏省.TiC和TiB混杂增强钛基复合材料研究新进展[J].钛工业发展,2008,25(4):20-23.
[12]张茂胜.TiC+TiB增强高温钛合金基复合材料的组织和性能研究[D].哈尔滨:哈尔滨工业大学,2011.
[13]Filip R,Kubiak K,Ziaja W,et al.The effect of microstructure on the mechanical properties of two-phase titanium alloys[J].Journal of Materials Processing Technology,2003,133(1/2):84-89.
[14]Haibin C,Jianzhong F,Tao Z,et al.Microstructural characterization of TiB in-situ synthesized titanium matrix composites[J].Chinese Journal of Rare Metals,2006,30(6):808-812.
[15]Lu W J,Zhang D,Zhang X N,et al.Microstructure and tensile properties of in situ(TiB+TiC)/Ti6242(TiB∶TiC=1∶1)composites prepared by common casting technique[J].Materials Science&Engineering A,2001,311(1/2):142-150.
[16]吕维洁,杨志峰,张荻.原位合成钛基复合材料增强体TiC的微结构特征[J].中国有色金属学报,2002,12(3):511-515.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |