Investigation of In-service Creep Failures of Aircraft Ti-6Al-4V Bolts

Iordanis Spyroglou; Kyriakos Kourousis; Angelos Koutsomichalis

doi:10.1051/matecconf/201818804008

Investigation of In-service Creep Failures of Aircraft Ti-6Al-4V Bolts

Iordanis Spyroglou
, Kyriakos Kourousis
, Angelos Koutsomichalis

Electronics Depot Centre-RandT Centre
Hellenic Air Force Academy

Research output: Contribution to journal › Conference article › peer-review

Abstract

Three Ti-6Al-4V bolts from mid-life jet aircraft failed during service operation. Each of the failed bolts were installed on a landing gear component. Metallurgical failure analysis indicated that the fracture mechanism is low temperature creep, possibly resulting from a sustained tension load over a long time. Visual inspection revealed ductile fracture morphology with no macroscopic deformation or corrosion. For all bolts fracture occurred close to the root at the first pitches of the thread. Scanning Electron Microscope (SEM) analysis revealed dimple morphologies with micro-void coalescence. Energy Dispersive X-Ray (EDX) analysis did not reveal any material deficiency that would have precipitated failure.

Original language	English
Article number	04008
Journal	MATEC Web of Conferences
Volume	188
DOIs	https://doi.org/10.1051/matecconf/201818804008
Publication status	Published - 7 Aug 2018
Event	5th International Conference of Engineering Against Failure, ICEAF-V 2018 - Chios, Greece Duration: 20 Jun 2018 → 22 Jun 2018

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10.1051/matecconf/201818804008

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title = "Investigation of In-service Creep Failures of Aircraft Ti-6Al-4V Bolts",

abstract = "Three Ti-6Al-4V bolts from mid-life jet aircraft failed during service operation. Each of the failed bolts were installed on a landing gear component. Metallurgical failure analysis indicated that the fracture mechanism is low temperature creep, possibly resulting from a sustained tension load over a long time. Visual inspection revealed ductile fracture morphology with no macroscopic deformation or corrosion. For all bolts fracture occurred close to the root at the first pitches of the thread. Scanning Electron Microscope (SEM) analysis revealed dimple morphologies with micro-void coalescence. Energy Dispersive X-Ray (EDX) analysis did not reveal any material deficiency that would have precipitated failure.",

author = "Iordanis Spyroglou and Kyriakos Kourousis and Angelos Koutsomichalis",

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T1 - Investigation of In-service Creep Failures of Aircraft Ti-6Al-4V Bolts

AU - Spyroglou, Iordanis

AU - Kourousis, Kyriakos

AU - Koutsomichalis, Angelos

N1 - Publisher Copyright: © The Authors, published by EDP Sciences, 2018.

PY - 2018/8/7

Y1 - 2018/8/7

N2 - Three Ti-6Al-4V bolts from mid-life jet aircraft failed during service operation. Each of the failed bolts were installed on a landing gear component. Metallurgical failure analysis indicated that the fracture mechanism is low temperature creep, possibly resulting from a sustained tension load over a long time. Visual inspection revealed ductile fracture morphology with no macroscopic deformation or corrosion. For all bolts fracture occurred close to the root at the first pitches of the thread. Scanning Electron Microscope (SEM) analysis revealed dimple morphologies with micro-void coalescence. Energy Dispersive X-Ray (EDX) analysis did not reveal any material deficiency that would have precipitated failure.

AB - Three Ti-6Al-4V bolts from mid-life jet aircraft failed during service operation. Each of the failed bolts were installed on a landing gear component. Metallurgical failure analysis indicated that the fracture mechanism is low temperature creep, possibly resulting from a sustained tension load over a long time. Visual inspection revealed ductile fracture morphology with no macroscopic deformation or corrosion. For all bolts fracture occurred close to the root at the first pitches of the thread. Scanning Electron Microscope (SEM) analysis revealed dimple morphologies with micro-void coalescence. Energy Dispersive X-Ray (EDX) analysis did not reveal any material deficiency that would have precipitated failure.

UR - https://www.scopus.com/pages/publications/85053210413

U2 - 10.1051/matecconf/201818804008

DO - 10.1051/matecconf/201818804008

M3 - Conference article

AN - SCOPUS:85053210413

SN - 2261-236X

VL - 188

JO - MATEC Web of Conferences

JF - MATEC Web of Conferences

M1 - 04008

T2 - 5th International Conference of Engineering Against Failure, ICEAF-V 2018

Y2 - 20 June 2018 through 22 June 2018

ER -

Investigation of In-service Creep Failures of Aircraft Ti-6Al-4V Bolts

Abstract

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