Precipitate Behavior and Microstructure Evolution of γ’ Phase in Ni-Al Alloys with the Internal Elastic Strain

Abstract:

The microstructure evolution and precipitation behaviors of ordered γ (Ni₃Al) phase in Ni-Al alloys were studied using the phase field dynamic model. Under the interactions of internal elastic strain, the γ phase morphology changes from the separated cuboidal to connected rectangle shape with the decrease of the aging temperature or the increase of the Al concentration. It also shows that the ordering of precipitates is finished instantly when they precipitate from the matrix phase. The γ phase volume fraction and the phase transformation velocity are affected by the aging temperature and composition of the Ni-Al alloys.

• Periodical: Materials Science Forum (Volume 749)
• Pages: 491-497
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.749.491
• Online since: March 2013
• Authors: Xiao Ling Cheng, Yong Sheng Li, Lei Zhang, Hao Zhu
• Keywords: Elastic Strain, Microstructure Evolution, Ni-Al Alloy, Phase Field, Precipitation

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