Thermodynamic modeling of Cr-Al-C and Ni-Al-C systems for low-density steels
作者机构：State Key Laboratory of Advanced Special SteelShanghai UniversityShanghai 200444China School of Materials Science and EngineeringShanghai UniversityShanghai 200444China
出 版 物：《Journal of Iron and Steel Research(International)》 (钢铁研究学报（英文版）)
年 卷 期：2020年第27卷第10期
页 面：1190-1199页
核心收录：
学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学]
基 金：Thanks are given to the support from the NationalKey R&D Program of China(Grant No.2017YFB0304402) W.S.Zheng acknowledges the support from the Shanghai Sailing Program(Grant No.19YF1415700) the National Natural Science Foundation of China(Grant No.51901124)
主 题：Cr-Al-C system Ni-Al-C system Thermodynamic model CALPHAD Low-density steel
摘 要：The so-called low-density steels have generated a lot of interests with their high specific strength and ductility due to the addi-tion of the light element *** order to accelerate the low-density steel design,a thermodynamic database has been developedwithin the present author *** Al-containing systems,i.e.,Cr-Al-Cand Ni-Al-C,were modeled and optimirzed with CALPHAD approach based on the reliable binary *** Cr-Al-C,system,the Gibbs energy of Cr2AlC phasewas described by a temperature-dependent polynomial with the aid of the experimental data on the heat capacity,instead of estimating heat capacity from Ncumann-Kopp *** incongruent melting temperature of Cr2AlC is 1762 K with theinvariant reaction of liquid+Cr3C2+Al4C3→*** phase equilibria between Cr2AlC and binary phases were wellreproduced by using the present model *** Ni-Al-C system,the liquid,fec and bec phases have been optimizedto fit the carbon solubility in these three phases.A good agreement between the calculated and experimental data has beenobtained using the present description of Ni-Al-C *** reliable descriptions of the two ternary systems developedin the present work can be implemented into the thermodynamic database for low-density steels.
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