| δ/γ transformation in non-equilibrium solidified peritectic Fe-Ni alloy |
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| 作者单位： | CHEN YuZeng（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China） ;
LIU Feng（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China） ;
YANG GenCang（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China） ;
LIU Ning （State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China） ;
ZHOU YaoHe（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China） ; |
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| 摘 要： | 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 (△T) was elucidated. The results indicate that the change of △T can alter not only the overall δ/γ transformation pathways but also the transformation fraction with respect to each transformation mechanism.
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| 关 键 词： | δ/γ transformation undercooling non-equilibrium solidification peritectic reaction Fe-Ni alloy |
| 收稿时间： | 12 February 2007 |
| 修稿时间： | 27 April 2007 |
<Emphasis Type="Italic">δ</Emphasis>/<Emphasis Type="Italic">γ</Emphasis> transformation in non-equilibrium solidified peritectic Fe-Ni alloy |
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| Authors: | Chen YuZeng Liu Feng Yang GenCang Liu Ning Zhou YaoHe |
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| Institution: | (1) State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, 710072, China |
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| Abstract: | 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.
Supported by 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), and the Natural Science Foundation
of Shaanxi Province, China (Grant No. 2004E108) |
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| Keywords: | δ /γ transformation undercooling non-equilibrium solidification peritectic reaction Fe-Ni alloy |
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