Two-Phase Microstructures of Gamma+Gamma-Prime Formed by Phase-Separations due to Heat-Treatments of Elastically Constrained Ni-Al-Ti Alloys

Abstract:

In the elastically constrained Ni-Al-Ti alloy system, three kinds of phase-separations, i.e. microstructure changes, take place to bring the two-phase state of γ+γ’ depending on the alloy compositions and heat treatments: 1) in Ni-8at%Al-6at%Ti, the phase-separation of γ phase takes place and γ’ particles appear in the γ matrix, 2) in Ni-13at%Al-9at%Ti, the phase-separation of γ’ intermetallic phase takes place and γ particles appear in the γ’ matrix, 3) in Ni-8.5at%Al-5.4at%Ti, the phase-separation of γ’ precipitate phase takes place and γ particles appear in the γ’ precipitate.

• Periodical: Materials Science Forum (Volumes 539-543)
• Pages: 3006-3011
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.539-543.3006
• Online since: March 2007
• Authors: Minoru Doi, Takao Kozakai, Tomokazu Moritani, Shizuo Naito
• Keywords: Coarsening, Elasticity Effect, Gamma-Prime Phase, Nickel-Based Alloy, Phase Separation, Precipitation

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