Identification of Relationships between Heat Treatment and Fatigue Crack Growth of αβ Titanium Alloys
- Resource Type
- Authors
- Patrick Villechaise; Céline Larignon; Simon Perusin; Gilbert Hénaff; Vincent Renon
- Source
- Metals, Vol 9, Iss 5, p 512 (2019)
Metals
Volume 9
Issue 5
- Subject
- lcsh:TN1-997
titanium alloy
Materials science
microstructure
Alloy
02 engineering and technology
engineering.material
Crack closure
0203 mechanical engineering
mental disorders
crack closure
Shielding effect
General Materials Science
Lamellar structure
Composite material
lcsh:Mining engineering. Metallurgy
heat treatment
Metals and Alloys
Titanium alloy
Paris' law
021001 nanoscience & nanotechnology
Microstructure
020303 mechanical engineering & transports
engineering
Fracture (geology)
crack growth
0210 nano-technology
- Language
- ISSN
- 2075-4701
This study deals with the influence of microstructure on the fatigue crack growth resistance of &alpha
&beta
titanium alloys: Ti-6Al-4V ELI (Extra Low Interstitial) that may compete with the conventional Ti-6Al-4V alloy in the manufacture of high performance aircraft. Six different microstructures have been considered: the as-received bimodal microstructures and five distinct fully lamellar microstructures. The characteristic parameters of these microstructures were determined and crack growth tests were performed with crack closure measurements in order to evaluate the shielding effect induced by closure. A comparison of crack growth rates, fracture surfaces, and crack path was carried out for the different microstructures. The results outline a transition between two propagation regimes from a microstructure-sensitive to microstructure-insensitive propagation.