TY - JOUR
T1 - Influence of substituting Mo for W on solidification characteristics of Re-containing Ni based single crystal superalloy
AU - Ai, Cheng
AU - Liu, Lin
AU - Zhang, Jun
AU - Guo, Min
AU - Li, Zhuoran
AU - Huang, Taiwen
AU - Zhou, Jian
AU - Li, Shusuo
AU - Gong, Shengkai
AU - Liu, Gang
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/7/25
Y1 - 2018/7/25
N2 - The influence of substituting Mo for W on solidification characteristics of Re-containing single crystal superalloy was investigated via experimental analysis and thermodynamic calculation. W-rich single crystal superalloy (Alloy W) and Mo-rich single crystal superalloy (Alloy Mo) both had typical dendritic microstructure, while interdendritic precipitations of Alloy W and Alloy Mo were γ′ phase+γ/γ′ eutectic phases and γ′ phase+NiMo phase, respectively. Meanwhile, W significantly segregated to dendritic region in Alloy W, while Mo segregated to interdendritic region in Alloy Mo. Moreover, substituting Mo for W obviously decreased the microsegregation degree of Re and Al elements. The influence of substituting Mo for W on microsegregation behavior of alloying elements (e.g. Re) effectively decreased the tendency of forming freckle during solidification. Furthermore, substituting Mo for W decreased liquidus temperature and solidus temperature of single crystal superalloy.
AB - The influence of substituting Mo for W on solidification characteristics of Re-containing single crystal superalloy was investigated via experimental analysis and thermodynamic calculation. W-rich single crystal superalloy (Alloy W) and Mo-rich single crystal superalloy (Alloy Mo) both had typical dendritic microstructure, while interdendritic precipitations of Alloy W and Alloy Mo were γ′ phase+γ/γ′ eutectic phases and γ′ phase+NiMo phase, respectively. Meanwhile, W significantly segregated to dendritic region in Alloy W, while Mo segregated to interdendritic region in Alloy Mo. Moreover, substituting Mo for W obviously decreased the microsegregation degree of Re and Al elements. The influence of substituting Mo for W on microsegregation behavior of alloying elements (e.g. Re) effectively decreased the tendency of forming freckle during solidification. Furthermore, substituting Mo for W decreased liquidus temperature and solidus temperature of single crystal superalloy.
KW - Microsegregation behavior
KW - Microstructure
KW - Ni based single crystal superalloy
KW - Solidification characteristic temperatures
KW - Substituting Mo for W
UR - https://www.scopus.com/pages/publications/85046726417
U2 - 10.1016/j.jallcom.2018.04.301
DO - 10.1016/j.jallcom.2018.04.301
M3 - 文章
AN - SCOPUS:85046726417
SN - 0925-8388
VL - 754
SP - 85
EP - 92
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -