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微量Hf对变形TiAl合金组织和力学性能的影响 被引量：1

Effects of minor Hafnium addition on microstructures and mechanical properties of forgingγ-TiAl
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摘要 对比观察含Hf和不含Hf的TiAl合金的变形组织和热处理组织，发现在1310℃／1h／AC热处理后均获得近全层片组织，平均晶粒尺寸为50～70μm，γ相的体积分数为12％左右；退火温度升高至1320℃，则均获得了全层片组织，平均层片团尺寸为200～300μm．在同为近全层片组织下进行力学性能试验发现：添加合金元素Hf，使TiAl合金800℃高温拉伸强度提高60MPa和800℃，150MPa应力持久寿命由84h提高到128h． Forging and subsequent heat treatment microstructures of y - TiM were investigated to assess the effect of minor hafnium. It was found that near full lamellar microstructures with cluster size in 50 - 70μm were obtained by annealing at 1 310 ℃, and the volume fraction ofy phase was 12% . Full lamellar microstructures cluster size is 200 300 μm when the annealing temperature increased to 1 320℃. The mechanical properties were tested in the material with near full lamellar. The results showed that ultimate tensile strength increased by 60 MPa at 800 ℃ , and the life of stress endurance encreased from 84 h to 128 h at endurance 150 MPa condition due to the hafnium addition in the studied TiAl alloy.
作者 昌霞 韩鹏彪 司家勇 张继
机构地区 北京钢铁研究总院
出处 《材料与冶金学报》 CAS 2009年第1期60-63,共4页 Journal of Materials and Metallurgy
基金 国家高技术研究发展计划(863计划)
关键词 微量Hf 近层片组织 高温性能 钛铝合金 minor Hf near full lamellar high temperature properties TiAl alloy
分类号 TG146.2 [金属学及工艺—金属材料] TG115.5 [金属学及工艺—物理冶金]
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参考文献11

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共引文献5

同被引文献15

  • 1张宁,林均品,王艳丽,陈国良.合金元素Y对高铌TiAl高温合金长期抗氧化性的影响[J].航空材料学报,2006,26(6):42-45. 被引量：11
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材料与冶金学报
2009年 第1期

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