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Effect of hot rolling and heat treatment on microstructure and tensile properties of high strength beta titanium alloy sheets

机译：热轧和热处理对高强度β钛合金薄板组织和拉伸性能的影响

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摘要

Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe is a high-strength β titanium alloy that shows excellent tensile properties. This paper presents the effect of hot rolling and heat treatment on the microstructure and tensile properties of this alloy. Microstructure observation shows that the α+β rolled alloy leads to smaller β grain size than the β rolled alloy in all heat treatment conditions. Solution treatment of the alloy in the α+β field can also lead to smaller β grain than solution in the β field. Tensile results indicated that the strength of the alloy was improved greatly by aging heat treatment, which was attributed to the secondary α phase. The 790 ℃ rolled alloy can obtain an ultimate strength of 1744 MPa by solution at 800 ℃ plus aging at 440 ℃. The strength decreases and ductility increases with the increase of aging temperature. Moreover, the ductility of the alloy is significantly determined by the rolling and solution procedure. Rolling and solution treated at the α+β field results in better ductility than rolling and solution at the β field. Therefore, to obtain the high ductility, the α+β rolling and α+β solution should be chosen as long as possible before aging heat treatment.
机译：Ti-3.5Al-5Mo-6V-3Cr-2Sn-0.5Fe是高强度的β钛合金，具有出色的拉伸性能。本文介绍了热轧和热处理对该合金的组织和拉伸性能的影响。显微组织观察表明，在所有热处理条件下，α+β轧制合金导致的β晶粒尺寸均小于β轧制合金。合金在α+β场中的固溶处理也可能导致比在β场中的固溶更小的β晶粒。拉伸结果表明，时效热处理大大提高了合金的强度，这归因于二次α相。该790℃合金在800℃固溶时的极限强度为1744 MPa，在440℃时效时效。随着时效温度的升高，强度降低，延展性提高。而且，合金的延展性由轧制和固溶程序显着确定。在α+β场进行的轧制和固溶处理比在β场进行的轧制和固溶处理具有更好的延展性。因此，为了获得高延展性，应在时效热处理之前尽可能长地选择α+β轧制和α+β溶液。

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  • 来源
    《Materials Science and Engineering》 |2015年第17期|67-74|共8页
  • 作者

    Z.X. Du; S.L. Xiao; Y.P. Shen; J.S. Liu; J. Liu; L.J. Xu; F.T. Kong; Y.Y. Chen;

  • 作者单位

    School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohehot 010051, PR China;

    National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, PR China;

    School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710000, PR China;

    School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohehot 010051, PR China;

    School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohehot 010051, PR China;

    National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, PR China;

    National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, PR China;

    National Key Laboratory of Science and Technology on Precision Heat Processing of Metals, Harbin Institute of Technology, Harbin 150001, PR China;

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

    Hot rolling; Heat treatment; Microstructure; Tensile properties; High-strength β titanium alloy;

    机译：热轧;热处理;微观结构拉伸性能;高强度β钛合金;

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