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Effect of thermal exposure on the room temperature tensile properties of Grade 2 titanium

机译:热暴露对2级钛室温拉伸性能的影响

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摘要

During exposure to the atmosphere at elevated temperature an α stabilised region develops on the surface of titanium alloys, the thickness of which is dependent on the temperature and cumulative time of exposure. In this research, samples of ASTM Grade 2 titanium were treated at a range of temperatures and times to investigate the effects of surface oxygen contamination on tensile properties. The stabilised a region that developed during the heat treatment was brittle and cracked easily after small amounts of strain, however these cracks were mostly arrested at the boundary between the transformed region and the bulk metal. The tensile strength of the heat-treated samples was compared to predicted values that assumed the transformed α-region did not contribute to the load bearing area. The comparison is reasonable when predicting the strength of samples treated at temperatures below the bulk α-β transition temperature but has limitations when applied to higher temperatures.
机译:在高温下暴露于大气期间,钛合金表面会形成一个α稳定区,其厚度取决于温度和暴露的累积时间。在这项研究中,在一定温度和时间范围内对ASTM 2级钛样品进行了处理,以研究表面氧污染对拉伸性能的影响。热处理过程中形成的稳定区域易碎,经过少量应变后很容易开裂,但是这些裂纹大多停留在转变区域和块状金属之间的边界处。将热处理后样品的抗拉强度与假设变形的α区域对承载面积无贡献的预测值进行比较。当预测在低于整体α-β转变温度的温度下处理的样品的强度时,该比较是合理的,但在应用于较高温度时会受到限制。

著录项

  • 来源
    《Materials Science and Engineering》 |2011年第11期|p.3925-3929|共5页
  • 作者单位

    CAST Cooperative Research Centre, School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia;

    CAST Cooperative Research Centre, School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia;

    CAST Cooperative Research Centre, School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia,Defence Materials Technology Centre, The University of Queensland, Brisbane, Queensland, Australia;

    CAST Cooperative Research Centre, School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, Australia,Defence Materials Technology Centre, The University of Queensland, Brisbane, Queensland, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    titanium alloys; mechanical characterisation; thermomechanical processing;

    机译:钛合金机械特性热机械加工;

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