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Effect of hot deformation on the mechanical properties of electron beam welded TC11-Ti<sub>2</sub>AlNb alloys
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1.School of Materials Science and Engineering,North MinZu University;2.School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an

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Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    Abstract:

    Nanoindentation and Vikers indentation tests were carried out to characterize the hardness and elastic modulus profiles in the vicinity of welding area for TC11/Ti2AlNb alloys with different conditions. Distribution of nano/micro scales mechanical behavior was analyzed combined with the microstructure. It was shown that the decomposed martensite α" phase was the major contributor to the reduction of hardness in the heat affected zone of TC11 alloy. Phases precipitated in welding zone and heat affected zone of Ti2AlNb alloy resulted in the hardness increased. Forging and heat treatment processes can improve the elastic modulus of the welding area. After welding, the elastic modulus was only ~92GPa in the welding zone, but the value was risen up to ~130GPa after heat treatment. Meanwhile, the yield strength of the welding zone increased after deformation treatment, which was consistent with the results that the hardness and elastic modulus variation in the welding area.

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[Chun Qin, Zekun Yao. Effect of hot deformation on the mechanical properties of electron beam welded TC11-Ti<sub>2</sub>AlNb alloys[J]. Rare Metal Materials and Engineering,2019,48(11):3463~3469.]
DOI:10.12442/j. issn.1002-185X.20180991

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History
  • Received:September 26,2018
  • Revised:October 09,2019
  • Adopted:November 12,2018
  • Online: December 10,2019
  • Published: