Fatigue crack growth behaviour in single-colony lamellar structure of Ti–6Al–4V

Yoji Mine; Shunsuke Katashima; Rengen Ding; Paul Bowen; Kazuki Takashima

doi:10.1016/j.scriptamat.2019.02.029

Fatigue crack growth behaviour in single-colony lamellar structure of Ti–6Al–4V

Yoji Mine^*
, Shunsuke Katashima
, Rengen Ding
, Paul Bowen
, Kazuki Takashima

^*Corresponding author for this work

Metallurgy and Materials

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

13 Citations (Scopus)

Abstract

Microstructural fatigue crack growth in Ti–6Al–4V lamellar colonies was examined using small compact-tension specimens, with post-fatigue-test transmission electron microscopy for a mechanistic understanding of the anisotropy. In colonies oriented favourably for prismatic slip in the α phase, the crack grew by alternating shearing on two symmetrically arranged prismatic slip planes (unzipping process). Interlamellar decohesion along the α/β interface significantly increased the crack growth rate, which depended on the lamellar orientation. When the colony was loaded along [0001], deflected crack growth was accompanied by basal slip and < c + a > pyramidal slip gliding, and the crack growth rates slightly exceeded those during unzipping.

Original language	English
Pages (from-to)	107-111
Number of pages	5
Journal	Scripta Materialia
Volume	165
Early online date	23 Feb 2019
DOIs	https://doi.org/10.1016/j.scriptamat.2019.02.029
Publication status	Published - 1 May 2019

Keywords

Deformation structure
Fatigue
Micro-mechanical test
Slip
Titanium alloys

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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title = "Fatigue crack growth behaviour in single-colony lamellar structure of Ti–6Al–4V",

abstract = "Microstructural fatigue crack growth in Ti–6Al–4V lamellar colonies was examined using small compact-tension specimens, with post-fatigue-test transmission electron microscopy for a mechanistic understanding of the anisotropy. In colonies oriented favourably for prismatic slip in the α phase, the crack grew by alternating shearing on two symmetrically arranged prismatic slip planes (unzipping process). Interlamellar decohesion along the α/β interface significantly increased the crack growth rate, which depended on the lamellar orientation. When the colony was loaded along [0001], deflected crack growth was accompanied by basal slip and < c + a > pyramidal slip gliding, and the crack growth rates slightly exceeded those during unzipping.",

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author = "Yoji Mine and Shunsuke Katashima and Rengen Ding and Paul Bowen and Kazuki Takashima",

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doi = "10.1016/j.scriptamat.2019.02.029",

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journal = "Scripta Materialia",

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T1 - Fatigue crack growth behaviour in single-colony lamellar structure of Ti–6Al–4V

AU - Mine, Yoji

AU - Katashima, Shunsuke

AU - Ding, Rengen

AU - Bowen, Paul

AU - Takashima, Kazuki

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Microstructural fatigue crack growth in Ti–6Al–4V lamellar colonies was examined using small compact-tension specimens, with post-fatigue-test transmission electron microscopy for a mechanistic understanding of the anisotropy. In colonies oriented favourably for prismatic slip in the α phase, the crack grew by alternating shearing on two symmetrically arranged prismatic slip planes (unzipping process). Interlamellar decohesion along the α/β interface significantly increased the crack growth rate, which depended on the lamellar orientation. When the colony was loaded along [0001], deflected crack growth was accompanied by basal slip and < c + a > pyramidal slip gliding, and the crack growth rates slightly exceeded those during unzipping.

AB - Microstructural fatigue crack growth in Ti–6Al–4V lamellar colonies was examined using small compact-tension specimens, with post-fatigue-test transmission electron microscopy for a mechanistic understanding of the anisotropy. In colonies oriented favourably for prismatic slip in the α phase, the crack grew by alternating shearing on two symmetrically arranged prismatic slip planes (unzipping process). Interlamellar decohesion along the α/β interface significantly increased the crack growth rate, which depended on the lamellar orientation. When the colony was loaded along [0001], deflected crack growth was accompanied by basal slip and < c + a > pyramidal slip gliding, and the crack growth rates slightly exceeded those during unzipping.

KW - Deformation structure

KW - Fatigue

KW - Micro-mechanical test

KW - Slip

KW - Titanium alloys

UR - https://www.scopus.com/pages/publications/85061770080

U2 - 10.1016/j.scriptamat.2019.02.029

DO - 10.1016/j.scriptamat.2019.02.029

M3 - Article

AN - SCOPUS:85061770080

SN - 1359-6462

VL - 165

SP - 107

EP - 111

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Fatigue crack growth behaviour in single-colony lamellar structure of Ti–6Al–4V

Abstract

Keywords

ASJC Scopus subject areas

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