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Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy
Wang, Changshuai; Su, Haijun; Guo, YongAn; Guo, Jianting; Zhou, Lanzhang; Wang, CS; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2017-09-01
发表期刊SPRINGER
ISSN0947-8396
卷号123期号:9页码:-
摘要Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy, considered as boiler and turbine materials in 700 degrees C advanced ultra-supercritical coal-fired power plants, have been investigated by differential thermal analysis and directional solidification quenching technique. Results reveal that P decreases the solidus temperature, but only has negligible influence on liquidus temperature. After P was added, the solidification sequence has no apparent change, but the width of the mushy zone increases and dendritic structures become coarser. Moreover, P increases the amount and changes the morphology of MC carbide. Energy-dispersive spectroscopy analysis reveals that P has obvious influence on the segregation behavior of the constitute elements with equilibrium partition coefficients (k(i)) far away from unity, whereas has negligible effect on the constituent elements with k(i) close to unity and has more influence on the final stage of solidification than at early stage. The distribution profiles reveal that P atoms pile up ahead of the solid/liquid (S/L) interface and strongly segregate to the interdendritic liquid region. The influence of P on solidification characteristics and segregation behavior of Ni-Fe-Cr-based alloy could be attributed to the accumulation of P ahead of the S/L interface during solidification.; Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy, considered as boiler and turbine materials in 700 degrees C advanced ultra-supercritical coal-fired power plants, have been investigated by differential thermal analysis and directional solidification quenching technique. Results reveal that P decreases the solidus temperature, but only has negligible influence on liquidus temperature. After P was added, the solidification sequence has no apparent change, but the width of the mushy zone increases and dendritic structures become coarser. Moreover, P increases the amount and changes the morphology of MC carbide. Energy-dispersive spectroscopy analysis reveals that P has obvious influence on the segregation behavior of the constitute elements with equilibrium partition coefficients (k(i)) far away from unity, whereas has negligible effect on the constituent elements with k(i) close to unity and has more influence on the final stage of solidification than at early stage. The distribution profiles reveal that P atoms pile up ahead of the solid/liquid (S/L) interface and strongly segregate to the interdendritic liquid region. The influence of P on solidification characteristics and segregation behavior of Ni-Fe-Cr-based alloy could be attributed to the accumulation of P ahead of the S/L interface during solidification.
部门归属[wang, changshuai ; guo, yongan ; guo, jianting ; zhou, lanzhang] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [su, haijun] northwestern polytech univ, state key lab solidificat proc, xian 710072, peoples r china
学科领域Materials Science, Multidisciplinary ; Physics, Applied
资助者National Energy Administration Program of China [NY20150102]; National Key Research and Development Program of China [2017YFB0305204]; National Natural Science Foundation of China [51301171]; Fund of the State Key Laboratory of Solidification Processing in NWPU [SKLSP201512]; Science and Technology Program of Sichuan Province [2016JZ0036]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79126
专题中国科学院金属研究所
通讯作者Wang, CS; Zhou, LZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wang, Changshuai,Su, Haijun,Guo, YongAn,et al. Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy[J]. SPRINGER,2017,123(9):-.
APA Wang, Changshuai.,Su, Haijun.,Guo, YongAn.,Guo, Jianting.,Zhou, Lanzhang.,...&Zhou, LZ .(2017).Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy.SPRINGER,123(9),-.
MLA Wang, Changshuai,et al."Solidification characteristics and segregation behavior of a P-containing Ni-Fe-Cr-based alloy".SPRINGER 123.9(2017):-.
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