Alternative TitleSolidification Characteristics and Segregation Behavior of a Ni-Fe-Cr Based Alloy
王常帅1; 苏海军2; 郭永安1; 郭建亭1; 周兰章1
Source Publication稀有金属材料与工程
Other AbstractThe solidification characteristics and segregation behavior of a Ni-Fe-Cr based alloy with planar interface and dendritic growth, which was obtained through quenching experiments during directional solidification, were investigated. Results show that the major precipitates are γ, γ′ and MC. The phase transition route is determined as follows: L→L+γ→L+γ+MC→γ+γ′+MC. The solution distribution coefficients of Ti, Nb and Mo are less than unity. The solution distribution coefficients of Fe is greater than unity, and Al and Cr are close to 1. The solute boundary layer forms ahead of the liquid/solid interface when the steady-state growth begins. The solute is carried away mainly by diffusion in the solute boundary layer, but carried away mainly by flow out of the solute boundary layer. The solut e distribution in solid phase with dendritic growth is similar to that with planar interface growth. However, the solute concentration in the quenche d liquid in the interdendritic area is obviously higher than that ahead of the liquid/solid interface. The solidification segre gation of the mushy zone is more serious than that of the solid region. It indicates that the back-diffusion in solid phase and the precipitation of MC carbide would reduce the solidification segregation during the dendritic growth.
KeywordNi-Fe-Cr基合金 凝固组织 凝固路径 溶质分配系数 枝晶偏析
Indexed ByCSCD
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Document Type期刊论文
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GB/T 7714
王常帅,苏海军,郭永安,等. 一种Ni-Fe-Cr基合金的凝固特征和偏析行为[J]. 稀有金属材料与工程,2018,47.0(012):3816-3823.
APA 王常帅,苏海军,郭永安,郭建亭,&周兰章.(2018).一种Ni-Fe-Cr基合金的凝固特征和偏析行为.稀有金属材料与工程,47.0(012),3816-3823.
MLA 王常帅,et al."一种Ni-Fe-Cr基合金的凝固特征和偏析行为".稀有金属材料与工程 47.0.012(2018):3816-3823.
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