δ/γtransformation in non-equilibrium solidified peritectic Fe-Ni alloy  

作　　者：CHEN YuZeng LIU Feng YANG GenCang LIU Ning ZHOU YaoHe 

机构地区：[1]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2007年第4期421-431,共11页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China (Grant Nos. 50395103,50501020 and 50431030);the Fundamental Research Project of National Defense of China (Grant No. A2720060295);the New Century Excellent Person Supporting Project (Grant No. NCET-05-870);the Doctorate Foundation of Northwestern Polytechnical University (Grant No. CX200604);the Scientific and Technological Creative Foundation of Youth in Northwestern Polytechnical University,the Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education of China (Grant No. N6CJ0002); the Natural Science Foundation of Shaanxi Province,China (Grant No. 2004E108)

摘　　要：Through phase transformation kinetic analysis and experimental observation,the δ/γtransformation occurring in the non-equilibrium peritectic Fe-4.33at.%Ni alloys was systematically investigated.According to JMA solid-state transformation ki-netic theory,the Time-Temperature-Transformation(TTT)curves of the δ/γtrans-formation in peritectic Fe-Ni alloy were calculated.On this basis,the physical cor-relation between the δ/γtransformation and the initial undercooling of melt(T)was elucidated.The results indicate that the change of T can alter not only the overall δ/γtransformation pathways but also the transformation fraction with re-spect to each transformation mechanism.Through phase transformation kinetic analysis and experimental observation, the δ/γ transformation occurring in the non-equilibrium peritectic Fe-4.33at.%Ni alloys was systematically investigated. According to JMA solid-state transformation kinetic theory, the Time-Temperature-Transformation (TTT) curves of the δ/γ transformation in peritectic Fe-Ni alloy were calculated. On this basis, the physical correlation between the δ/γ transformation and the initial undercooling of melt (ΔT) was elucidated. The results indicate that the change of ΔT can alter not only the overall δ/γ transformation pathways but also the transformation fraction with respect to each transformation mechanism.

关 键 词：δ/γ TRANSFORMATION UNDERCOOLING NON-EQUILIBRIUM solidification PERITECTIC reaction FE-NI alloy 

分 类 号：O414.13[理学—理论物理]