Effect of Alloying Elements on Volume Fraction of γ′ Phase in Power Metallurgy Nickel-Base Superalloy

Abstract:

The effect of alloying elements on the volume fraction of γ′ phase at aging temperature was investigated. The results indicated the volume fraction of γ′ was mainly sensitive to Al, Ti, Nb, Ta, and Cr. Based on analyzing the chemical component and the volume fraction of γ′ phase of 20 kinds of nickel-base superalloys , a linear regression formula between the volume fraction of γ′ phase and alloying element content was established using Matlab software, and the formula was given as: Vγ′=21.06+5.76Al+0.41Co-0.95Cr+0.84Hf+2.15Nb+0.82Ta+3.06Ti, where the correlation coefficient r = 95.5%. This linear equation was more accurate compared with the three public empirical formulas.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 430-437
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.430
• Online since: June 2017
• Authors: Yang Chen*, Gao Feng Tian, Lei Zhou, Yue Wang, Guo Jun Ma, Jie Yang, Jin Wen Zou
• Keywords: Alloy Chemical Component, Nickel-Base Superalloy, Volume Fraction of γ' Phase

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