Fabrication of artificial defects to study internal fatigue crack propagation in metals
Language
en
Article de revue
This item was published in
Scripta Materialia. 2019, vol. 171, p. 87-91
Elsevier
Abstract
Fatigue specimens designed with controlled internal defects were obtained by diffusion bonding of Ti-6Al-4V sheets containing femtosecond laser drilled notches. Crack initiation from the internal defect occurred systematically. ...Read more >
Fatigue specimens designed with controlled internal defects were obtained by diffusion bonding of Ti-6Al-4V sheets containing femtosecond laser drilled notches. Crack initiation from the internal defect occurred systematically. The cracks were characterised by in situ synchrotron X-ray tomography. Propagation rates are lower than those of surface cracks of comparable sizes in the same material and fall between experimental data obtained for fatigue cracks propagating in air and in vacuum.Read less <
English Abstract
Fatigue specimens designed with controlled internal defects were obtained by diffusion bonding of Ti-6Al-4V sheets containing femtosecond laser drilled notches. Crack initiation from the internal defect occurred systematically. ...Read more >
Fatigue specimens designed with controlled internal defects were obtained by diffusion bonding of Ti-6Al-4V sheets containing femtosecond laser drilled notches. Crack initiation from the internal defect occurred systematically. The cracks were characterised by in situ synchrotron X-ray tomography. Propagation rates are lower than those of surface cracks of comparable sizes in the same material and fall between experimental data obtained for fatigue cracks propagating in air and in vacuum. © 2019 Acta Materialia Inc.Read less <
English Keywords
Titanium alloys
Ternary alloys
Synchrotrons
Synchrotron radiation
Spark plasma sintering
Fatigue of materials
Fatigue crack propagation
Aluminum alloys
Surface cracks
Propagation rate
Fatigue specimen
In-situ synchrotrons
Internal defects
Artificial defects
Fatigue cracks
Tomography
Vanadium alloys
Three-dimensional tomography
Origin
Hal imported