A modified CALPHAD model for thermal expansion coefficient in Invar Ni-Fe(FCC) alloys

被引：5

作者：

Ding, Qi ^{[1
]}

Shi, Zhan ^{[1
]}

Xu, Mingyue ^{[1
]}

Sun, Nannan ^{[1
]}

Li, Cong ^{[1
]}

Han, Jiajia ^{[1
]}

Lu, Yong ^{[1
]}

Yang, Shuiyuan ^{[1
]}

Wang, Cuiping ^{[1
]}

Liu, Xingjun ^{[1
]}

Xu, Weiwei ^{[2
]}

机构：

[1] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Sch Aerosp Engn, Xiamen 361005, Peoples R China

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2018年 / 152卷

关键词：

Ni-Fe alloys; CALPHAD; Invar alloys; Thermal expansion coefficient; Ferromagnetic-paramagnetic transition; Ni-base superalloys; THERMODYNAMIC PROPERTIES; MOLAR VOLUME; NI;

D O I：

10.1016/j.commatsci.2018.04.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A modified CALPHAD (Calculation of Phase Diagram) model of the coefficients of thermal expansion (CTE) of Invar Ni-Fe FCC (Face Center Cubic) alloys was established, based on previous models of heat capacity. The key to the modification is the addition of the new parameters to describe the complicated phase transition around the Invar alloys composition. The parameters of the CALPHAD model were assessed over the whole composition range and in the temperature range from 200 K to 1200 K according to previous CTE data reported in the literature. Using assessed parameters, the calculated CTE values for the Ni-Fe FCC alloys are in remarkable agreement with the experimental test data, especially around the Invar alloys composition. This work provides an effective CALPHAD model to deal with CTE in Ni-Fe FCC alloys, which will be of benefit for the development of Invar alloys and Ni-Fe-base superalloys.

引用

页码：178 / 182

页数：5

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