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首页> 外文期刊>High temperature materials and processes >Microstructural Properties and Four-Point Bend Fatigue Behavior of Ti-6.5Al-2Zr-1Mo-1V Welded Joints by Electron Beam Welding
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Microstructural Properties and Four-Point Bend Fatigue Behavior of Ti-6.5Al-2Zr-1Mo-1V Welded Joints by Electron Beam Welding

机译：电子束焊接Ti-6.5Al-2Zr-1Mo-1V焊接接头的组织性能和四点弯曲疲劳行为

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摘要

With the help of a four-point-bend of fatigue rig, high-cycle fatigue tests were carried out on an Ti-6.5Al-2Zr-1Mo-1V titanium alloy at room temperature, 20 Hz and R = 0.1 in ambient air. The test results indicated that the fatigue strength of base metal, 888 MPa, is about 120% of yield strength. The fatigue strength of joints is 814 MPa. It is about 110% of yield strength of base metal. When the loading stress is higher, the fatigue failure region is located in middle weld zone of weld face, which the cracks are propagated along coarse β phase's grain boundary. When the loading stress is lower, the fatigue failure region is located between the incomplete recrystallization zone and base metal. The crack nucleation resistance gradually increases from the WN to HAZ with the variable of loading stress and β phase (little α' phases)→α + β phase→ α phase.
机译：借助疲劳试验机的四点弯曲，在室温，20 Hz和环境空气中R = 0.1的条件下，对Ti-6.5Al-2Zr-1Mo-1V钛合金进行了高周疲劳测试。测试结果表明，母材的疲劳强度为888 MPa，约为屈服强度的120％。接头的疲劳强度为814 MPa。它约为母材屈服强度的110％。当加载应力较高时，疲劳破坏区域位于焊接面的中间焊接区，裂纹沿粗β相的晶界扩展。当加载应力较低时，疲劳破坏区域位于不完全再结晶区和母材之间。随载荷应力和β相（小的α′相）→α+β相→α相的变化，从WN到HAZ的裂纹成核阻力逐渐增加。

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  • 来源
    《High temperature materials and processes》 |2016年第6期|607-613|共7页
  • 作者

    Peng Liu; T. Zhai; Yuanbin Zhang;

  • 作者单位

    School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, P.R. China;

    Department of Chemical and Materials Engineering, University of Kentucky, 177 Anderson Hall, Lexington, KY 40506, USA;

    School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, P.R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    titanium alloy; electron beam welding; bending fatigue; microstructure;

    机译：钛合金电子束焊接;弯曲疲劳微观结构;

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