Effect of microstructure on torsion properties of Ti–5Al–5Mo–5V–3Cr–1Zr alloy

Chaowen Huang; Yongqing Zhao; Shewei Xin; Wei Zhou; Qian Li; Weidong Zeng

doi:10.1016/j.msea.2016.11.049

Effect of microstructure on torsion properties of Ti–5Al–5Mo–5V–3Cr–1Zr alloy

Chaowen Huang, Yongqing Zhao, Shewei Xin, Wei Zhou, Qian Li, Weidong Zeng

School of Materials Sience and Engineering

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

37 Scopus citations

Abstract

A combination of transmission electron microscopy and scanning electron microscopy was used to study torsion deformation and fracture behaviors of Ti–5Al–5Mo–5V–3Cr–1Zr (Ti–55531) alloy with lamellar microstructure (LM) and bimodal microstructure (BM) at ambient temperature. The results indicate that torsion strength and ductility of BM are significantly lower than those of LM. Shear bands and dislocation tangles are mainly observed in secondary α (α_s) lamellae for both microstructures. Furthermore, straight slip lines only exist in equiaxed primary α (α_p) phase. The coarsening α_s lamellae dominate the deformation of LM, while the deformation of BM is greatly controlled by equiaxed α_p phase. Fractographs of LM and BM show a mixture fracture mechanism of microvoid coalescence and transgranular shear fracture. Besides, BM exhibits intergranular fracture mechanism. Thus, Ti–55531 alloy with BM is easier to be damaged than LM during torsion loading.

Original language	English
Pages (from-to)	202-210
Number of pages	9
Journal	Materials Science and Engineering: A
Volume	682
DOIs	https://doi.org/10.1016/j.msea.2016.11.049
State	Published - 13 Jan 2017

Keywords

Fracture behavior
Microstructure
Ti–55531 titanium alloy
Torsion deformation

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10.1016/j.msea.2016.11.049

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title = "Effect of microstructure on torsion properties of Ti–5Al–5Mo–5V–3Cr–1Zr alloy",

abstract = "A combination of transmission electron microscopy and scanning electron microscopy was used to study torsion deformation and fracture behaviors of Ti–5Al–5Mo–5V–3Cr–1Zr (Ti–55531) alloy with lamellar microstructure (LM) and bimodal microstructure (BM) at ambient temperature. The results indicate that torsion strength and ductility of BM are significantly lower than those of LM. Shear bands and dislocation tangles are mainly observed in secondary α (αs) lamellae for both microstructures. Furthermore, straight slip lines only exist in equiaxed primary α (αp) phase. The coarsening αs lamellae dominate the deformation of LM, while the deformation of BM is greatly controlled by equiaxed αp phase. Fractographs of LM and BM show a mixture fracture mechanism of microvoid coalescence and transgranular shear fracture. Besides, BM exhibits intergranular fracture mechanism. Thus, Ti–55531 alloy with BM is easier to be damaged than LM during torsion loading.",

keywords = "Fracture behavior, Microstructure, Ti–55531 titanium alloy, Torsion deformation",

author = "Chaowen Huang and Yongqing Zhao and Shewei Xin and Wei Zhou and Qian Li and Weidong Zeng",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = jan,

day = "13",

doi = "10.1016/j.msea.2016.11.049",

language = "英语",

volume = "682",

pages = "202--210",

journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Effect of microstructure on torsion properties of Ti–5Al–5Mo–5V–3Cr–1Zr alloy

AU - Huang, Chaowen

AU - Zhao, Yongqing

AU - Xin, Shewei

AU - Zhou, Wei

AU - Li, Qian

AU - Zeng, Weidong

PY - 2017/1/13

Y1 - 2017/1/13

N2 - A combination of transmission electron microscopy and scanning electron microscopy was used to study torsion deformation and fracture behaviors of Ti–5Al–5Mo–5V–3Cr–1Zr (Ti–55531) alloy with lamellar microstructure (LM) and bimodal microstructure (BM) at ambient temperature. The results indicate that torsion strength and ductility of BM are significantly lower than those of LM. Shear bands and dislocation tangles are mainly observed in secondary α (αs) lamellae for both microstructures. Furthermore, straight slip lines only exist in equiaxed primary α (αp) phase. The coarsening αs lamellae dominate the deformation of LM, while the deformation of BM is greatly controlled by equiaxed αp phase. Fractographs of LM and BM show a mixture fracture mechanism of microvoid coalescence and transgranular shear fracture. Besides, BM exhibits intergranular fracture mechanism. Thus, Ti–55531 alloy with BM is easier to be damaged than LM during torsion loading.

AB - A combination of transmission electron microscopy and scanning electron microscopy was used to study torsion deformation and fracture behaviors of Ti–5Al–5Mo–5V–3Cr–1Zr (Ti–55531) alloy with lamellar microstructure (LM) and bimodal microstructure (BM) at ambient temperature. The results indicate that torsion strength and ductility of BM are significantly lower than those of LM. Shear bands and dislocation tangles are mainly observed in secondary α (αs) lamellae for both microstructures. Furthermore, straight slip lines only exist in equiaxed primary α (αp) phase. The coarsening αs lamellae dominate the deformation of LM, while the deformation of BM is greatly controlled by equiaxed αp phase. Fractographs of LM and BM show a mixture fracture mechanism of microvoid coalescence and transgranular shear fracture. Besides, BM exhibits intergranular fracture mechanism. Thus, Ti–55531 alloy with BM is easier to be damaged than LM during torsion loading.

KW - Fracture behavior

KW - Microstructure

KW - Ti–55531 titanium alloy

KW - Torsion deformation

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U2 - 10.1016/j.msea.2016.11.049

DO - 10.1016/j.msea.2016.11.049

M3 - 文章

AN - SCOPUS:84996629691

SN - 0921-5093

VL - 682

SP - 202

EP - 210

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Effect of microstructure on torsion properties of Ti–5Al–5Mo–5V–3Cr–1Zr alloy

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Keywords

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