Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy

Zhihong Wu; Hongchao Kou; Luyao Tang; Wei Chen; Xiaoning Han; Ying Deng; Bin Tang; Jinshan Li

doi:10.1016/j.engfracmech.2020.107129

Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy

Zhihong Wu
, Hongchao Kou
, Luyao Tang
, Wei Chen
, Xiaoning Han
, Ying Deng
, Bin Tang
, Jinshan Li

School of Materials Sience and Engineering

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

25 Scopus citations

Abstract

In this work, the samples of Ti-6Al-4V alloy are fatigued at room temperature (RT) and 400 ℃ to reveal the effect of microstructure on high-cycle fatigue behaviors. Results show that the RT fatigue strength monotonically increases with increasing primary α (α_p) percentage, while a moderate α_p percentage shows slightly higher fatigue strength value at 400 ℃. Ti-6Al-4V with 45–60% α_p exhibit relatively long fatigue life and small scatter in fatigue data. The crack-initiation sites of RT failed specimens show isolated or contiguous α_p facets. Fatigue steps associated with the multiple crack-initiation are observed in 400 ℃ failed specimens.

Original language	English
Article number	107129
Journal	Engineering Fracture Mechanics
Volume	235
DOIs	https://doi.org/10.1016/j.engfracmech.2020.107129
State	Published - Aug 2020

Keywords

Fractography
High cycle fatigue
Microstructure
S-N curves
Titanium alloys

Access to Document

10.1016/j.engfracmech.2020.107129

Cite this

@article{a8f2d3cb19984d65970632b487d72985,

title = "Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy",

abstract = "In this work, the samples of Ti-6Al-4V alloy are fatigued at room temperature (RT) and 400 ℃ to reveal the effect of microstructure on high-cycle fatigue behaviors. Results show that the RT fatigue strength monotonically increases with increasing primary α (αp) percentage, while a moderate αp percentage shows slightly higher fatigue strength value at 400 ℃. Ti-6Al-4V with 45–60\% αp exhibit relatively long fatigue life and small scatter in fatigue data. The crack-initiation sites of RT failed specimens show isolated or contiguous αp facets. Fatigue steps associated with the multiple crack-initiation are observed in 400 ℃ failed specimens.",

keywords = "Fractography, High cycle fatigue, Microstructure, S-N curves, Titanium alloys",

author = "Zhihong Wu and Hongchao Kou and Luyao Tang and Wei Chen and Xiaoning Han and Ying Deng and Bin Tang and Jinshan Li",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = aug,

doi = "10.1016/j.engfracmech.2020.107129",

language = "英语",

volume = "235",

journal = "Engineering Fracture Mechanics",

issn = "0013-7944",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy

AU - Wu, Zhihong

AU - Kou, Hongchao

AU - Tang, Luyao

AU - Chen, Wei

AU - Han, Xiaoning

AU - Deng, Ying

AU - Tang, Bin

AU - Li, Jinshan

PY - 2020/8

Y1 - 2020/8

N2 - In this work, the samples of Ti-6Al-4V alloy are fatigued at room temperature (RT) and 400 ℃ to reveal the effect of microstructure on high-cycle fatigue behaviors. Results show that the RT fatigue strength monotonically increases with increasing primary α (αp) percentage, while a moderate αp percentage shows slightly higher fatigue strength value at 400 ℃. Ti-6Al-4V with 45–60% αp exhibit relatively long fatigue life and small scatter in fatigue data. The crack-initiation sites of RT failed specimens show isolated or contiguous αp facets. Fatigue steps associated with the multiple crack-initiation are observed in 400 ℃ failed specimens.

AB - In this work, the samples of Ti-6Al-4V alloy are fatigued at room temperature (RT) and 400 ℃ to reveal the effect of microstructure on high-cycle fatigue behaviors. Results show that the RT fatigue strength monotonically increases with increasing primary α (αp) percentage, while a moderate αp percentage shows slightly higher fatigue strength value at 400 ℃. Ti-6Al-4V with 45–60% αp exhibit relatively long fatigue life and small scatter in fatigue data. The crack-initiation sites of RT failed specimens show isolated or contiguous αp facets. Fatigue steps associated with the multiple crack-initiation are observed in 400 ℃ failed specimens.

KW - Fractography

KW - High cycle fatigue

KW - Microstructure

KW - S-N curves

KW - Titanium alloys

UR - https://www.scopus.com/pages/publications/85086436529

U2 - 10.1016/j.engfracmech.2020.107129

DO - 10.1016/j.engfracmech.2020.107129

M3 - 文章

AN - SCOPUS:85086436529

SN - 0013-7944

VL - 235

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 107129

ER -

Microstructural effects on the high-cycle fatigue and fracture behaviors of Ti-6Al-4V alloy

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this