Contributions of internal hydrogen and room-temperature creep to the abnormal fatigue cracking of Ti6246 at high Kmax

F. Mignot; V. Doquet; C. Sarrazin-Baudoux

doi:10.1016/j.msea.2004.04.006

Contributions of internal hydrogen and room-temperature creep to the abnormal fatigue cracking of Ti6246 at high K_max

F. Mignot, V. Doquet, C. Sarrazin-Baudoux

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

Abstract

This study aims at explaining the absence of a threshold for crack propagation in an α/β titanium alloy during cyclic tests performed with constant K_max and increasing K_min, if K_max is higher than 60-70% of K_Ic. Tensile, creep as well as fatigue crack growth tests are performed on specimens with various hydrogen content. SIMS analyses of hydrogen content around the tip of a crack developed in the abnormal regime are made. Solute hydrogen is shown to segregate at the crack tip and to enhance room-temperature creep, strain localisation and decohesion along α/β interfaces.

Original language	English
Pages (from-to)	308-319
Number of pages	12
Journal	Materials Science and Engineering: A
Volume	380
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2004.04.006
Publication status	Published - 25 Aug 2004
Externally published	Yes

Keywords

Cracking
Creep
Fatigue threshold
Hydrogen
Titanium

Access to Document

10.1016/j.msea.2004.04.006

Cite this

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title = "Contributions of internal hydrogen and room-temperature creep to the abnormal fatigue cracking of Ti6246 at high Kmax",

abstract = "This study aims at explaining the absence of a threshold for crack propagation in an α/β titanium alloy during cyclic tests performed with constant Kmax and increasing Kmin, if Kmax is higher than 60-70\% of KIc. Tensile, creep as well as fatigue crack growth tests are performed on specimens with various hydrogen content. SIMS analyses of hydrogen content around the tip of a crack developed in the abnormal regime are made. Solute hydrogen is shown to segregate at the crack tip and to enhance room-temperature creep, strain localisation and decohesion along α/β interfaces.",

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author = "F. Mignot and V. Doquet and C. Sarrazin-Baudoux",

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T1 - Contributions of internal hydrogen and room-temperature creep to the abnormal fatigue cracking of Ti6246 at high Kmax

AU - Mignot, F.

AU - Doquet, V.

AU - Sarrazin-Baudoux, C.

PY - 2004/8/25

Y1 - 2004/8/25

N2 - This study aims at explaining the absence of a threshold for crack propagation in an α/β titanium alloy during cyclic tests performed with constant Kmax and increasing Kmin, if Kmax is higher than 60-70% of KIc. Tensile, creep as well as fatigue crack growth tests are performed on specimens with various hydrogen content. SIMS analyses of hydrogen content around the tip of a crack developed in the abnormal regime are made. Solute hydrogen is shown to segregate at the crack tip and to enhance room-temperature creep, strain localisation and decohesion along α/β interfaces.

AB - This study aims at explaining the absence of a threshold for crack propagation in an α/β titanium alloy during cyclic tests performed with constant Kmax and increasing Kmin, if Kmax is higher than 60-70% of KIc. Tensile, creep as well as fatigue crack growth tests are performed on specimens with various hydrogen content. SIMS analyses of hydrogen content around the tip of a crack developed in the abnormal regime are made. Solute hydrogen is shown to segregate at the crack tip and to enhance room-temperature creep, strain localisation and decohesion along α/β interfaces.

KW - Cracking

KW - Creep

KW - Fatigue threshold

KW - Hydrogen

KW - Titanium

U2 - 10.1016/j.msea.2004.04.006

DO - 10.1016/j.msea.2004.04.006

M3 - Article

AN - SCOPUS:3242715695

SN - 0921-5093

VL - 380

SP - 308

EP - 319

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 1-2