The improved strength and toughness in the quinary Cr2Nb/Cr in-situ composite

Yunlong Xue; Shuangming Li; Yuanting Wu; Hulin Liu; Kewei Li

doi:10.1016/j.jallcom.2020.153957

The improved strength and toughness in the quinary Cr₂Nb/Cr in-situ composite

Yunlong Xue, Shuangming Li, Yuanting Wu, Hulin Liu, Kewei Li

School of Materials Sience and Engineering

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

7 Scopus citations

Abstract

A quinary Cr–12Nb–5Ti–5Mo–5Si (at.%) alloy was prepared by arc melting in this study to improve the strength and toughness of Laves phase Cr₂Nb alloy. The quinary alloy was solidified with full eutectic Cr₂Nb/Cr, in which the Cr₂Nb phase exceeded 55 vol % and existed as matrix. The eutectic was developed with an orientation relationship of {001}Cr₂Nb//{001}Cr, leading to a low lattice mismatch of 15.57% at the eutectic interface. The yield strength and fracture toughness of the quinary alloy reached 1950–1980 MPa and 14.0–14.8 MPa⋅m^1/2, respectively, much higher than most reported Cr₂Nb alloys. The reason for the superior properties is the synergistic effects of solid solution strengthening, alloying toughening, and eutectic strengthening-toughening.

Original language	English
Article number	153957
Journal	Journal of Alloys and Compounds
Volume	825
DOIs	https://doi.org/10.1016/j.jallcom.2020.153957
State	Published - 5 Jun 2020

Keywords

Intermetallics
Liquid-solid reactions
Mechanical properties
Microstructure

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title = "The improved strength and toughness in the quinary Cr2Nb/Cr in-situ composite",

abstract = "A quinary Cr–12Nb–5Ti–5Mo–5Si (at.%) alloy was prepared by arc melting in this study to improve the strength and toughness of Laves phase Cr2Nb alloy. The quinary alloy was solidified with full eutectic Cr2Nb/Cr, in which the Cr2Nb phase exceeded 55 vol % and existed as matrix. The eutectic was developed with an orientation relationship of {001}Cr2Nb//{001}Cr, leading to a low lattice mismatch of 15.57% at the eutectic interface. The yield strength and fracture toughness of the quinary alloy reached 1950–1980 MPa and 14.0–14.8 MPa⋅m1/2, respectively, much higher than most reported Cr2Nb alloys. The reason for the superior properties is the synergistic effects of solid solution strengthening, alloying toughening, and eutectic strengthening-toughening.",

keywords = "Intermetallics, Liquid-solid reactions, Mechanical properties, Microstructure",

author = "Yunlong Xue and Shuangming Li and Yuanting Wu and Hulin Liu and Kewei Li",

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year = "2020",

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doi = "10.1016/j.jallcom.2020.153957",

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T1 - The improved strength and toughness in the quinary Cr2Nb/Cr in-situ composite

AU - Xue, Yunlong

AU - Li, Shuangming

AU - Wu, Yuanting

AU - Liu, Hulin

AU - Li, Kewei

PY - 2020/6/5

Y1 - 2020/6/5

N2 - A quinary Cr–12Nb–5Ti–5Mo–5Si (at.%) alloy was prepared by arc melting in this study to improve the strength and toughness of Laves phase Cr2Nb alloy. The quinary alloy was solidified with full eutectic Cr2Nb/Cr, in which the Cr2Nb phase exceeded 55 vol % and existed as matrix. The eutectic was developed with an orientation relationship of {001}Cr2Nb//{001}Cr, leading to a low lattice mismatch of 15.57% at the eutectic interface. The yield strength and fracture toughness of the quinary alloy reached 1950–1980 MPa and 14.0–14.8 MPa⋅m1/2, respectively, much higher than most reported Cr2Nb alloys. The reason for the superior properties is the synergistic effects of solid solution strengthening, alloying toughening, and eutectic strengthening-toughening.

AB - A quinary Cr–12Nb–5Ti–5Mo–5Si (at.%) alloy was prepared by arc melting in this study to improve the strength and toughness of Laves phase Cr2Nb alloy. The quinary alloy was solidified with full eutectic Cr2Nb/Cr, in which the Cr2Nb phase exceeded 55 vol % and existed as matrix. The eutectic was developed with an orientation relationship of {001}Cr2Nb//{001}Cr, leading to a low lattice mismatch of 15.57% at the eutectic interface. The yield strength and fracture toughness of the quinary alloy reached 1950–1980 MPa and 14.0–14.8 MPa⋅m1/2, respectively, much higher than most reported Cr2Nb alloys. The reason for the superior properties is the synergistic effects of solid solution strengthening, alloying toughening, and eutectic strengthening-toughening.

KW - Intermetallics

KW - Liquid-solid reactions

KW - Mechanical properties

KW - Microstructure

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DO - 10.1016/j.jallcom.2020.153957

M3 - 文章

AN - SCOPUS:85078676162

SN - 0925-8388

VL - 825

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 153957

ER -

The improved strength and toughness in the quinary Cr₂Nb/Cr in-situ composite

Abstract

Keywords

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