Microstructure stability and damage mechanisms in an α/β Ti-6Al-4V-0.55Fe alloy during low cycle dwell-fatigue at room temperature

Shan Shi; Qinghua Deng; Hang Zhang; Liang Feng; Xiangjun Xu; Jie Ding; Hui Chang; Lian Zhou

doi:10.1016/j.ijfatigue.2021.106585

Microstructure stability and damage mechanisms in an α/β Ti-6Al-4V-0.55Fe alloy during low cycle dwell-fatigue at room temperature

Shan Shi, Qinghua Deng, Hang Zhang, Liang Feng, Xiangjun Xu, Jie Ding, Hui Chang, Lian Zhou

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

15 Scopus citations

Abstract

The cyclic behavior and microstructure evolution of Ti-6Al-4V-0.55Fe alloy were investigated with three different total strain amplitudes. A slight softening was occurred with Δε_t/2 = 1.20%, and the alloy mainly suffered α recrystallization. Besides, a gentle softening can be observed with Δε_t/2 = 1.60%, which led to more substructure deformation. Furthermore, a sudden drop of the stress amplitude was occurred with Δε_t/2 = 4.00% which resulted in more plastic deformation. The phase transformation and α recrystallization were observed. Cracks were propagated along the α grain boundaries and the α/β lamellar interfaces due to the concentrated dislocations at the α/β lamellar interfaces.

Original language	English
Article number	106585
Journal	International Journal of Fatigue
Volume	155
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106585
State	Published - Feb 2022
Externally published	Yes

Keywords

Cyclic behavior
Fracture behavior
Phase transformation
Titanium alloy

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10.1016/j.ijfatigue.2021.106585

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title = "Microstructure stability and damage mechanisms in an α/β Ti-6Al-4V-0.55Fe alloy during low cycle dwell-fatigue at room temperature",

abstract = "The cyclic behavior and microstructure evolution of Ti-6Al-4V-0.55Fe alloy were investigated with three different total strain amplitudes. A slight softening was occurred with Δεt/2 = 1.20%, and the alloy mainly suffered α recrystallization. Besides, a gentle softening can be observed with Δεt/2 = 1.60%, which led to more substructure deformation. Furthermore, a sudden drop of the stress amplitude was occurred with Δεt/2 = 4.00% which resulted in more plastic deformation. The phase transformation and α recrystallization were observed. Cracks were propagated along the α grain boundaries and the α/β lamellar interfaces due to the concentrated dislocations at the α/β lamellar interfaces.",

keywords = "Cyclic behavior, Fracture behavior, Phase transformation, Titanium alloy",

author = "Shan Shi and Qinghua Deng and Hang Zhang and Liang Feng and Xiangjun Xu and Jie Ding and Hui Chang and Lian Zhou",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2022",

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doi = "10.1016/j.ijfatigue.2021.106585",

language = "英语",

volume = "155",

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TY - JOUR

T1 - Microstructure stability and damage mechanisms in an α/β Ti-6Al-4V-0.55Fe alloy during low cycle dwell-fatigue at room temperature

AU - Shi, Shan

AU - Deng, Qinghua

AU - Zhang, Hang

AU - Feng, Liang

AU - Xu, Xiangjun

AU - Ding, Jie

AU - Chang, Hui

AU - Zhou, Lian

PY - 2022/2

Y1 - 2022/2

N2 - The cyclic behavior and microstructure evolution of Ti-6Al-4V-0.55Fe alloy were investigated with three different total strain amplitudes. A slight softening was occurred with Δεt/2 = 1.20%, and the alloy mainly suffered α recrystallization. Besides, a gentle softening can be observed with Δεt/2 = 1.60%, which led to more substructure deformation. Furthermore, a sudden drop of the stress amplitude was occurred with Δεt/2 = 4.00% which resulted in more plastic deformation. The phase transformation and α recrystallization were observed. Cracks were propagated along the α grain boundaries and the α/β lamellar interfaces due to the concentrated dislocations at the α/β lamellar interfaces.

AB - The cyclic behavior and microstructure evolution of Ti-6Al-4V-0.55Fe alloy were investigated with three different total strain amplitudes. A slight softening was occurred with Δεt/2 = 1.20%, and the alloy mainly suffered α recrystallization. Besides, a gentle softening can be observed with Δεt/2 = 1.60%, which led to more substructure deformation. Furthermore, a sudden drop of the stress amplitude was occurred with Δεt/2 = 4.00% which resulted in more plastic deformation. The phase transformation and α recrystallization were observed. Cracks were propagated along the α grain boundaries and the α/β lamellar interfaces due to the concentrated dislocations at the α/β lamellar interfaces.

KW - Cyclic behavior

KW - Fracture behavior

KW - Phase transformation

KW - Titanium alloy

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U2 - 10.1016/j.ijfatigue.2021.106585

DO - 10.1016/j.ijfatigue.2021.106585

M3 - 文章

AN - SCOPUS:85116883337

SN - 0142-1123

VL - 155

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 106585

ER -

Microstructure stability and damage mechanisms in an α/β Ti-6Al-4V-0.55Fe alloy during low cycle dwell-fatigue at room temperature

Abstract

Keywords

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