不同温度下晶面衍射弹性常数的两相模型计算

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Abstract Nickel-based superalloy can be regarded as a two-phase material with matrix phase (Ni phase) and mixed phase (Ni₃Al phase) (ignoring a few other phases). A two phase model for calculating diffraction elastic constant is established by self-consistent way, combined with Eshelby inclusion theory. The elastic stiffness coefficient of two-phase single crystal at high temperature is obtained by quasi harmonic Debye theory and first principle calculation, and the diffraction elastic constants of related crystal surfaces of nickel base superalloy at different temperatures are calculated by substituting the model. The accuracy of the model is verified by the small error between the calculated results and the experimental measurements reported in the literature.

Key words： stress Ni-base superalloy two phase elastic constant temperature

Received: 11 December 2019 Published: 19 June 2020

ZTFLH:	TG115.23
	TB35

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	Articles by authors
	XU Haifeng
	ZHU Changjun
	CHEN Kanghua
	LIU Li

Cite this article:

XU Haifeng,ZHU Changjun,CHEN Kanghua, et al. Two-phase model calculation of diffraction elastic constant of crystal plane at different temperature[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(2): 91-97.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I2/91

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