Characterization of fracture toughness and toughening mechanisms in Laves phase Cr2Nb based alloys

Y. L. Xue; S. M. Li; H. Zhong; H. Z. Fu

doi:10.1016/j.msea.2015.04.077

Characterization of fracture toughness and toughening mechanisms in Laves phase Cr₂Nb based alloys

Y. L. Xue, S. M. Li, H. Zhong, H. Z. Fu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

36 Scopus citations

Abstract

The effect of Ti content on the fracture toughness of the Cr₂Nb-20/30/40Ti (in at.%) alloys has been investigated in the arc melting and heat treatment (1473K for 48h) conditions. The results show that the reduction of grain size and the facture toughness of the alloys increased with increasing the Ti content. After the heat treatment, the facture toughness of the Cr₂Nb-20/30Ti alloys increased by almost twice, and the crack bridging was primarily observed as the toughening mechanism, and for the Cr₂Nb-40Ti alloy, the fracture toughness increased by 77% and reached 18.80MPam^1/2, and the toughening mechanism transited to the crack defection. The alleviation of deformation constraint during the heat treatment was elucidated to be effective in improving the fracture toughness of the alloys.

Original language	English
Pages (from-to)	340-347
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	638
DOIs	https://doi.org/10.1016/j.msea.2015.04.077
State	Published - 5 Jun 2015

Keywords

Fracture
Grain refinement
Intermetallics
Mechanical characterization

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10.1016/j.msea.2015.04.077

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title = "Characterization of fracture toughness and toughening mechanisms in Laves phase Cr2Nb based alloys",

abstract = "The effect of Ti content on the fracture toughness of the Cr2Nb-20/30/40Ti (in at.%) alloys has been investigated in the arc melting and heat treatment (1473K for 48h) conditions. The results show that the reduction of grain size and the facture toughness of the alloys increased with increasing the Ti content. After the heat treatment, the facture toughness of the Cr2Nb-20/30Ti alloys increased by almost twice, and the crack bridging was primarily observed as the toughening mechanism, and for the Cr2Nb-40Ti alloy, the fracture toughness increased by 77% and reached 18.80MPam1/2, and the toughening mechanism transited to the crack defection. The alleviation of deformation constraint during the heat treatment was elucidated to be effective in improving the fracture toughness of the alloys.",

keywords = "Fracture, Grain refinement, Intermetallics, Mechanical characterization",

author = "Xue, {Y. L.} and Li, {S. M.} and H. Zhong and Fu, {H. Z.}",

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doi = "10.1016/j.msea.2015.04.077",

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T1 - Characterization of fracture toughness and toughening mechanisms in Laves phase Cr2Nb based alloys

AU - Xue, Y. L.

AU - Li, S. M.

AU - Zhong, H.

AU - Fu, H. Z.

PY - 2015/6/5

Y1 - 2015/6/5

N2 - The effect of Ti content on the fracture toughness of the Cr2Nb-20/30/40Ti (in at.%) alloys has been investigated in the arc melting and heat treatment (1473K for 48h) conditions. The results show that the reduction of grain size and the facture toughness of the alloys increased with increasing the Ti content. After the heat treatment, the facture toughness of the Cr2Nb-20/30Ti alloys increased by almost twice, and the crack bridging was primarily observed as the toughening mechanism, and for the Cr2Nb-40Ti alloy, the fracture toughness increased by 77% and reached 18.80MPam1/2, and the toughening mechanism transited to the crack defection. The alleviation of deformation constraint during the heat treatment was elucidated to be effective in improving the fracture toughness of the alloys.

AB - The effect of Ti content on the fracture toughness of the Cr2Nb-20/30/40Ti (in at.%) alloys has been investigated in the arc melting and heat treatment (1473K for 48h) conditions. The results show that the reduction of grain size and the facture toughness of the alloys increased with increasing the Ti content. After the heat treatment, the facture toughness of the Cr2Nb-20/30Ti alloys increased by almost twice, and the crack bridging was primarily observed as the toughening mechanism, and for the Cr2Nb-40Ti alloy, the fracture toughness increased by 77% and reached 18.80MPam1/2, and the toughening mechanism transited to the crack defection. The alleviation of deformation constraint during the heat treatment was elucidated to be effective in improving the fracture toughness of the alloys.

KW - Fracture

KW - Grain refinement

KW - Intermetallics

KW - Mechanical characterization

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JO - Materials Science and Engineering: A

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ER -

Characterization of fracture toughness and toughening mechanisms in Laves phase Cr₂Nb based alloys

Abstract

Keywords

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