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      Microstructure and mechanical properties of Ti-5Al-2.5Fe alloy produced by powder forging

      Jia, Mingtu; Blanchard, Clément; Bolzoni, Leandro
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      978-3-0357-1163-9_39.pdf
      Accepted version, 730.9Kb
      DOI
       10.4028/www.scientific.net/KEM.770.39
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      Jia, M., Blanchard, C., & Bolzoni, L. (2018). Microstructure and mechanical properties of Ti-5Al-2.5Fe alloy produced by powder forging. Key Engineering Materials, 770, 39–44. https://doi.org/10.4028/www.scientific.net/KEM.770.39
      Permanent Research Commons link: https://hdl.handle.net/10289/11900
      Abstract
      Blended elemental powder metallurgy is a cost effective approach to produce near net shape titanium alloy parts; however, the residual pores remaining in sintered parts are detrimental to the mechanical properties. In this study, elemental powders (Ti, Al and Fe) were used to produce the Ti-5Al-2Fe alloy by a powder forging process, involving cold compaction, vacuum sintering, forging and heat treatment. The residual pores of the sintered parts were removed completely by forging at the temperature of 1250ºC. The effect of solution and aging and mill annealing heat treatments on the mechanical properties of the forged Ti-5Al-2Fe parts were studied. It is found that the ductility of the forged Ti-5Al-2Fe parts is improved significantly by both solution and aging treatment and mill annealing, without decreasing their ultimate tensile strength, which sits around 1000 MPa. The enhancement of the mechanical behaviour is justified via understanding the evolution of the residual porosity and of the microstructural features of the materials.
      Date
      2018
      Type
      Journal Article
      Publisher
      Trans Tech Publications
      Rights
      This is an author’s accepted version of an article published in the journal: Key Engineering Materials. © 2018 Trans Tech Publications, Switzerland.
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      • Science and Engineering Papers [3069]
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