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Effect of Upsetting and Cogging Technique on Microstructure and Mechanical Properties of β Titanium Alloy

  • Yunlian Qi
  • Liying Zeng
  • Xiaonan Mao
  • Shewei Xin
  • Liu Wei
  • Huamei Sun
Conference paper

Abstract

The effect of upsetting and cogging Technique on Microstructure and mechanical properties of β-CEZ and Ti-38644 titanium alloys is studied in this paper. The results showed that β grain boundaries are not distinct and lath-shaped α phases precipitate in grains, for the β-CEZ and Ti-38644 alloys with single upsetting and cogging under the transus temperature. The grains are relatively coarse and their sizes are non-uniform. While for the β-CEZ and Ti-38644 alloys with multiple upsetting and cogging, the equiaxed microstructure become fine and uniform. β grain boundaries are very clear and small acicular and lath-shape α phase also precipitate in the equiaxed grains, and the microstructure difference is small between along transverse direction and longitudinal one. The multiple upsetting and cogging can significantly improve the reduction of area and the mechanical properties of β-CEZ and Ti-38644 titanium alloys with the refined and uniform grains.

Keywords

β titanium alloy Upsetting and cogging Microstructure Mechanical properties 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Yunlian Qi
    • 1
  • Liying Zeng
    • 1
  • Xiaonan Mao
    • 1
  • Shewei Xin
    • 1
  • Liu Wei
    • 1
  • Huamei Sun
    • 1
  1. 1.Northwest Institute for Nonferrous Metal ResearchXi’anChina

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