Remarkable increase in high-cycle fatigue resistance in a titanium alloy with a fully lamellar microstructure

Changsheng Tan; Qiaoyan Sun; Guojun Zhang; Yongqing Zhao

doi:10.1016/j.ijfatigue.2020.105724

Remarkable increase in high-cycle fatigue resistance in a titanium alloy with a fully lamellar microstructure

Changsheng Tan
, Qiaoyan Sun
, Guojun Zhang
, Yongqing Zhao

School of Materials Science and Engineering

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

40 Scopus citations

Abstract

The high-cycle fatigues of a fully lamellar microstructure (FLM) and commercial material (TCM) in a titanium alloy were comparatively investigated. Significant increase in the fatigue property was observed in FLM compared with TCM. The underlying microstructure below the facet was obtained by using electron backscatter diffraction. A severe crack was observed to nucleate at the primary α/β interface due to a high strain concentration of TCM, while slip transmission, kink band and nanotwins were prevalent and beneficial to producing a uniform strain distribution with FLM. Dislocation interactions between the lamellar α caused the facet crack initiation at α colony boundaries.

Original language	English
Article number	105724
Journal	International Journal of Fatigue
Volume	138
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105724
State	Published - Sep 2020

Keywords

Crack initiation
Dislocation evolution
High cycle fatigue
Microstructures
Titanium alloy

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10.1016/j.ijfatigue.2020.105724

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title = "Remarkable increase in high-cycle fatigue resistance in a titanium alloy with a fully lamellar microstructure",

abstract = "The high-cycle fatigues of a fully lamellar microstructure (FLM) and commercial material (TCM) in a titanium alloy were comparatively investigated. Significant increase in the fatigue property was observed in FLM compared with TCM. The underlying microstructure below the facet was obtained by using electron backscatter diffraction. A severe crack was observed to nucleate at the primary α/β interface due to a high strain concentration of TCM, while slip transmission, kink band and nanotwins were prevalent and beneficial to producing a uniform strain distribution with FLM. Dislocation interactions between the lamellar α caused the facet crack initiation at α colony boundaries.",

keywords = "Crack initiation, Dislocation evolution, High cycle fatigue, Microstructures, Titanium alloy",

author = "Changsheng Tan and Qiaoyan Sun and Guojun Zhang and Yongqing Zhao",

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

year = "2020",

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doi = "10.1016/j.ijfatigue.2020.105724",

language = "英语",

volume = "138",

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T1 - Remarkable increase in high-cycle fatigue resistance in a titanium alloy with a fully lamellar microstructure

AU - Tan, Changsheng

AU - Sun, Qiaoyan

AU - Zhang, Guojun

AU - Zhao, Yongqing

PY - 2020/9

Y1 - 2020/9

N2 - The high-cycle fatigues of a fully lamellar microstructure (FLM) and commercial material (TCM) in a titanium alloy were comparatively investigated. Significant increase in the fatigue property was observed in FLM compared with TCM. The underlying microstructure below the facet was obtained by using electron backscatter diffraction. A severe crack was observed to nucleate at the primary α/β interface due to a high strain concentration of TCM, while slip transmission, kink band and nanotwins were prevalent and beneficial to producing a uniform strain distribution with FLM. Dislocation interactions between the lamellar α caused the facet crack initiation at α colony boundaries.

AB - The high-cycle fatigues of a fully lamellar microstructure (FLM) and commercial material (TCM) in a titanium alloy were comparatively investigated. Significant increase in the fatigue property was observed in FLM compared with TCM. The underlying microstructure below the facet was obtained by using electron backscatter diffraction. A severe crack was observed to nucleate at the primary α/β interface due to a high strain concentration of TCM, while slip transmission, kink band and nanotwins were prevalent and beneficial to producing a uniform strain distribution with FLM. Dislocation interactions between the lamellar α caused the facet crack initiation at α colony boundaries.

KW - Crack initiation

KW - Dislocation evolution

KW - High cycle fatigue

KW - Microstructures

KW - Titanium alloy

UR - https://www.scopus.com/pages/publications/85085270998

U2 - 10.1016/j.ijfatigue.2020.105724

DO - 10.1016/j.ijfatigue.2020.105724

M3 - 文章

AN - SCOPUS:85085270998

SN - 0142-1123

VL - 138

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 105724

ER -

Remarkable increase in high-cycle fatigue resistance in a titanium alloy with a fully lamellar microstructure

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Keywords

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