TY - JOUR
T1 - Microstructure characterization and fracture toughness of laves phase-based Cr-Nb-Ti alloys
AU - Xue, Yun Long
AU - Li, Shuang Ming
AU - Zhong, Hong
AU - Li, Lai Ping
AU - Fu, Heng Zhi
N1 - Publisher Copyright:
© The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2015.
PY - 2015/4/1
Y1 - 2015/4/1
N2 - Three Laves phase-based alloys with nominal compositions of Cr2Nb-xTi (x = 20, 30, 40, in at%) have been prepared through vacuum non-consumable arc melting. The results show that the microstructures of Cr2Nb-(20, 30) Ti alloys are composed of the primary Laves phase C15-Cr2(Nb,Ti) and bcc solid solution phase, while the microstructure of Cr2Nb-40Ti alloy is developed with the eutectic phases C15-Cr2(Nb,Ti)/bcc solid solution. The measured fracture toughness of ternary Laves phase C15-Cr2(Nb,Ti) is about 3.0 MPa m1/2, much larger than 1.4 MPa m1/2 for binary Laves phase Cr2Nb. Meanwhile, the fracture toughness of Cr2Nb-xTi (x = 20, 30, 40) alloys increases with increasing Ti content and reaches 10.6 MPa m1/2 in Cr2Nb-40Ti alloy. The eutectic microstructure and addition of Ti in Cr2Nb are found to be effective in toughening Laves phase-based alloys.
AB - Three Laves phase-based alloys with nominal compositions of Cr2Nb-xTi (x = 20, 30, 40, in at%) have been prepared through vacuum non-consumable arc melting. The results show that the microstructures of Cr2Nb-(20, 30) Ti alloys are composed of the primary Laves phase C15-Cr2(Nb,Ti) and bcc solid solution phase, while the microstructure of Cr2Nb-40Ti alloy is developed with the eutectic phases C15-Cr2(Nb,Ti)/bcc solid solution. The measured fracture toughness of ternary Laves phase C15-Cr2(Nb,Ti) is about 3.0 MPa m1/2, much larger than 1.4 MPa m1/2 for binary Laves phase Cr2Nb. Meanwhile, the fracture toughness of Cr2Nb-xTi (x = 20, 30, 40) alloys increases with increasing Ti content and reaches 10.6 MPa m1/2 in Cr2Nb-40Ti alloy. The eutectic microstructure and addition of Ti in Cr2Nb are found to be effective in toughening Laves phase-based alloys.
KW - Crack propagation
KW - Fracture
KW - Fracture toughness
KW - Laves phase-based alloys
KW - Microstructure characterization
UR - https://www.scopus.com/pages/publications/84924980278
U2 - 10.1007/s40195-015-0227-7
DO - 10.1007/s40195-015-0227-7
M3 - 文章
AN - SCOPUS:84924980278
SN - 1006-7191
VL - 28
SP - 514
EP - 520
JO - Acta Metallurgica Sinica (English Letters)
JF - Acta Metallurgica Sinica (English Letters)
IS - 4
ER -