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Effect of post weld heat treatment on microstructure and fracture toughness of friction welded joint

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Abstract

The effect of post weld heat treatment on the microstructure and fracture toughness of friction welded joints of Ti-6.5Al-1Mo-1V-2Zr alloy was studied. The experimental results show that equiaxial grains were formed at the center of the weld metal while highly deformed grains were observed in the thermomechanically affected zone. The fracture toughness of the weld metal was lower than that of the thermomechanically affected zone under as-weld and post weld heat treatment conditions. With increasing temperature of post weld heat treatment, the fracture toughness of weld center and thermomechanically affected zone increased. The fractographic observation revealed that the friction welded joints fractured in a ductile mode.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, China

    Sujun Wu  (吴素君), Bo Han, Dalong Zhao, Yingping Ji & Ling Shao

Authors
  1. Sujun Wu  (吴素君)
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  2. Bo Han
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  3. Dalong Zhao
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  4. Yingping Ji
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  5. Ling Shao
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Corresponding author

Correspondence to Sujun Wu  (吴素君).

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Funded by the Commission of Science, Techonology and Industry for National Defense (No.AXXD1818)

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Wu, S., Han, B., Zhao, D. et al. Effect of post weld heat treatment on microstructure and fracture toughness of friction welded joint. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 31, 1347–1351 (2016). https://doi.org/10.1007/s11595-016-1537-y

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  • DOI: https://doi.org/10.1007/s11595-016-1537-y

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