The evaluation of thermomechanical and heat treatment parameters on the microstructure and tensile properties of Ti-6Al-2Sn-4Zr-2Mo-0.08Si alloy

Articles in Press

Document Type : Original Research Article

Authors

1 Faculty of Material and Manufacturing Technologies., Malek Ashtar University of Technology, Tehran, Iran

2 Faculty of Materials and Manufacturing Technologies,, Malek Ashter University of Technology, Tehran, Iran

3 Faculty of Materials and Manufacturing Technologies, Malek Ashtar University of Technology.Tehran. Iran

10.22034/frj.2024.402919.1179

Abstract

The aim of this research is to study the effect of cooling enviroment after seconadry rolling and the annealing temperature on the microstructure and tensile properties of the near alpha Ti-6242S alloy. The produced ingot homogenized and hot rolled at 1150oC. Then, the transus temperature of alpha to beta of the alloy was determined as 1000±5oC via heat treatment and hot torsion test. Subsequently, the strips were secondary hot rolled at 940oC and cooled at water and air. Then, they were solution annealed for 1 hour at 940 and 970oC and water quenched and aged. Afterwards, the microstructure studeied and the tensile test was performed at 25 and 480oC. Results showed that the specimens with the same cooling enviroment annealead at 970oC as compared with the ones annealead at 940oC, have the microstructure with more globular and lower volume fraction of primary alpha phase and wider seconadry alpha phase results to achievement of higher strength and ducility. Besides, the increase in strength of the specimens cooled in air compared to the ones cooled in water after rooling is related to the higher volume fraction of alpha phase leading to decrease in ductility.

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Articles in Press, Accepted Manuscript
Available Online from 10 March 2024

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History

  • Receive Date: 18 June 2023
  • Revise Date: 08 October 2023
  • Accept Date: 10 March 2024

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