包潘飞,宋晓国.连接温度对高铌TiAl合金扩散接头组织和强度的影响[J].稀有金属材料与工程,2018,47(7):2132~2136.[Bao Panfei,Song Xiaoguo.Effect of Bonding Temperature on Microstructure and Strength of High Nb Containing TiAl Alloy Diffusion Joints[J].Rare Metal Materials and Engineering,2018,47(7):2132~2136.]
连接温度对高铌TiAl合金扩散接头组织和强度的影响
投稿时间:2016-07-04  修订日期:2016-08-25
中文关键词:  高铌TiAl合金  扩散连接  微观组织  力学性能
基金项目:国家科技重大专项资助,国家自然科学基金项目(面上项目,重点项目,重大项目),上海航天科技创新基金
中文摘要:
      摘 要: 在连接工艺参数为1000℃~1200℃/25MPa/90min情况下,对高铌TiAl合金(TAN)进行直接扩散连接。采用SEM、EDS、XRD和EBSD等方法对连接界面微观组织进行分析,并研究了连接温度对接头界面结构和剪切强度的影响。结果表明:当连接温度T<1100℃时,连接界面清晰垂直,继续升高温度,界面消失;扩散连接过程中,连接界面处出现再结晶现象,随着连接温度的升高,再结晶晶粒不断增多并长大,并且再结晶区域出现大量α2相;当连接温度达到1150℃时,接头平均抗剪强度达到最大值为105MPa。
Effect of Bonding Temperature on Microstructure and Strength of High Nb Containing TiAl Alloy Diffusion Joints
英文关键词:High Nb containing TiAl alloy  Diffusion bonding  Microstructure  Mechanical properities
英文摘要:
      Abstract: Direct diffusion bonding of high Nb containing TiAl alloy(TAN) has been conducted at temperatures of 1000℃~1200℃ for 90min under 25MPa in vacuum. The effect of bonding temperature on interfacial microstructure and mechanical properities of joints was studied and the microstructure of joints was detected by using SEM, EDS, XRD and EBSD. The results indicate that the distinct interface can be seen when the temperature is below 1100℃ and the higher temperature promotes interface disappear; recrystallized grains are observed at bonding interface. The number and size of grains increase with the rise of temperature and a lot of α2 phase appears in the area of recrystallization; the highest average shear strength of 105 MPa was achieved when bonded at the temperature of 1150℃ for 90min under 25MPa.
作者单位E-mail
包潘飞 哈尔滨工业大学 先进焊接与连接国家重点实验室 hitbpf@126.com 
宋晓国 哈尔滨工业大学 先进焊接与连接国家重点实验室 songxiaoguohit@sohu.com 
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