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International Journal of Machine Systems and Manufacturing Technology Original Research

Effect of Solution Heat Treatment and Aging on the tensile Properties of Ti-6Al-4V Alloy Component Manufactured by Wire Arc Additive Manufacturing

  1. Aniket Mitra Department of Mechanical Engineering, Asansol Engineering College, Asansol
  2. Dippayan Bouri Department of Mechanical Engineering, Asansol Engineering College, Asansol
  3. Harshadip Das Department of Mechanical Engineering, Asansol Engineering College, Asansol
  4. Sagar Kumar Mandal Department of Mechanical Engineering, Asansol Engineering College, Asansol
  5. Savan Kumar Department of Mechanical Engineering, Asansol Engineering College, Asansol
  6. Santu Majumder Department of Mechanical Engineering, Asansol Engineering College, Asansol
  7. Rittika Ghosh Department of Mechanical Engineering, Asansol Engineering College, Asansol
  8. Suraj Yadav Department of Mechanical Engineering, Asansol Engineering College, Asansol
  9. Kaushal Kishore Department of Mechanical Engineering, Asansol Engineering College, Asansol
  10. Srijan Paul Department of Mechanical Engineering, Asansol Engineering College, Asansol
  11. Sarnendu Paul Department of Mechanical Engineering, Asansol Engineering College, Asansol

Abstract

Wire Arc Additive Manufacturing (WAAM) is a cost-effective technique for fabricating components from the Ti-6Al-4V alloy, known for its high strength and utility in demanding applications. To maximize its strength, the alloy undergoes Solution Treating and Aging heat treatment, comprising three key steps: (i) Solution Treating: The alloy is heated to 950°C (just below the β transus) and held for 1 hour, increasing the β phase proportion. This step sets the foundation for further strengthening in subsequent stages. (ii) Quenching: Rapid cooling in water preserves the β-favored phase from solution treatment. Without rapid cooling, the material would revert to a higher α phase content upon slow cooling. However, this quenching process can introduce residual stresses and unstable structures, like martensite. (iii) Aging: The alloy is held at 530°C for 8 hours, decomposing residual martensite and unstable β phase into stable α and β phases. This controlled transformation enhances the alloy's mechanical strength, by up to 3.13%.

Keywords

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