Microstructure characterization and fracture toughness of laves phase-based Cr-Nb-Ti alloys

Yun Long Xue; Shuang Ming Li; Hong Zhong; Lai Ping Li; Heng Zhi Fu

doi:10.1007/s40195-015-0227-7

Microstructure characterization and fracture toughness of laves phase-based Cr-Nb-Ti alloys

Yun Long Xue, Shuang Ming Li, Hong Zhong, Lai Ping Li, Heng Zhi Fu

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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 m^1/2, much larger than 1.4 MPa m^1/2 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 m^1/2 in Cr₂Nb-40Ti alloy. The eutectic microstructure and addition of Ti in Cr₂Nb are found to be effective in toughening Laves phase-based alloys.

Original language	English
Pages (from-to)	514-520
Number of pages	7
Journal	Acta Metallurgica Sinica (English Letters)
Volume	28
Issue number	4
DOIs	https://doi.org/10.1007/s40195-015-0227-7
State	Published - 1 Apr 2015

Keywords

Crack propagation
Fracture
Fracture toughness
Laves phase-based alloys
Microstructure characterization

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10.1007/s40195-015-0227-7

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@article{708f980d3b254ef1abf0ba7f6677ff35,

title = "Microstructure characterization and fracture toughness of laves phase-based Cr-Nb-Ti alloys",

abstract = "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.",

keywords = "Crack propagation, Fracture, Fracture toughness, Laves phase-based alloys, Microstructure characterization",

author = "Xue, {Yun Long} and Li, {Shuang Ming} and Hong Zhong and Li, {Lai Ping} and Fu, {Heng Zhi}",

note = "Publisher Copyright: {\textcopyright} The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2015.",

year = "2015",

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doi = "10.1007/s40195-015-0227-7",

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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

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Microstructure characterization and fracture toughness of laves phase-based Cr-Nb-Ti alloys

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