Solidification characteristics of Fe-Ni peritectic al oy thin strips under a near-rapid solidification condition

作     者：Chang-jiang Song Yang Yang Yuan-yi Guo Yun-hu Zhang Wei Lu Qi-jie Zhai 

作者机构：State Key Laboratory of Advanced Special Steels Shanghai University Helmholtz-Zentrum Dresden-Rossendorf 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2015年第12卷第3期

页      面：189-195页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by China National Basic Research Development Project(973 Program:No.2010CB630802) China National Natural Science Foundation(No.51074104) Shanghai Science and Technology Development Funds(No.12QA1401200) the Fund of the State Key Laboratory of Solidification Processing at NWPU(No.SKLSP201222) 

主　　题：solidification characteristics Fe-Ni peritectic alloy near-rapid solidification 

摘      要：This paper is an experimental investigation of the structure evolution and the solute distribution of 2 mm thick strips of Fe-(2.6, 4.2, 4.7, 7.9wt.%)Ni peritectic alloy under a near-rapid solidification condition, which were in the regions of δ-ferrite single-phase, hypo-peritectic, hyper-peritectic and γ-austenite single-phase, respectively. The highest area ratio of equiaxed grain zone in the hyper-peritectic of Fe-4.7wt.%Ni alloy strip was observed, while other strips were mainly columnar grains. The lowest micro-segregation was obtained in the Fe-7.9wt.%Ni alloy strip, while micro-segregation in the Fe-4.7wt.%Ni alloy was the highest. As opposed to the microsegregation, the macro-segregation of all the Fe-Ni strips was suppressed due to the rapid solidification rate. Finally, the structure formation mechanism of Fe-Ni alloy strips was analyzed.