Effect of Ta on the Solidification Behavior of Ni₃Al-Base Single-Crystal Superalloys

Abstract:

Two kinds of Ni₃Al-base SC superalloys, including IC31A (3wt.%Ta) and IC31B (6wt.%Ta) were investigated in the present study by using the differential scanning calorimetry (DSC) and isothermal quenching technology. The results showed that the larger amount of blocky γ′ phases existed in IC31B than that in IC31A. In the solidification process, the primary phase in IC31B was γ′ phases while in alloy IC31A the primary phase was γ phases. Besides, the solidification rate of IC31B in the early stage was lower than that in IC31A.

• Periodical: Materials Science Forum (Volume 788)
• Pages: 426-432
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.788.426
• Online since: April 2014
• Authors: Tian Tian Zheng, Shu Suo Li*, Yan Ling Pei, Cheng Ai, Sheng Kai Gong
• Keywords: DSC, Isothermal Solidification, Ni₃Al-base Single Crystal Superalloys, Tantalum

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