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Microstructure and mechanical properties of PM Ti–Mo alloys
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State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

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    Abstract:

    : Ti-(8~20)Mo alloys from elemental powders were fabricated by powder metallurgy technique. The effects of sintering temperature and Mo content on the microstructure and mechanical properties were studied. The results show that the Ti-Mo alloys with high-density and uniform microstructure can be produce atsintering temperature range of 1400~1500. The lowest densification sinteringStemperatureSgradually increase with the rise of Mo content. Ti-(8~16)Mo alloys shows typical widmanstatten structure, whereas the Ti-20Mo alloy consists of single β grains. TheIn the range of 8%~16%,increasing Mo content can result in the decrease of β grains, and corespondingly the α lamellars become less and thinner.The as-PMed Ti-(8~20)Mo alloys obtained show good mechanical performence, and possess lower elastic modulus of 59~68 GPa.In comparison, the Ti-14Mo alloy sintered at 1450exhibits the superior mechanical properties with hardness of 35.7HRC, compressive strength of 2227 MPa, compression rate of 29.1%, and elastic modulus of 62.2 GPa.

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[Lin Yingwu, Lu Xin, Sun Bo, Liu Chengcheng, Qu Xuanhui. Microstructure and mechanical properties of PM Ti–Mo alloys[J]. Rare Metal Materials and Engineering,2017,46(5):1387~1392.]
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History
  • Received:January 21,2015
  • Revised:July 30,2015
  • Adopted:September 07,2015
  • Online: September 27,2017
  • Published: