1. Deformation and fracture behavior of new strain-transformable titanium alloys: a multi-scale investigation
- Author
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Frédéric Prima, Chloé Varenne, Anne-Françoise Gourgues-Lorenzon, Jacques Besson, Julie Bourgon, Cédrik Brozek, Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,Scale (ratio) ,Strain (chemistry) ,technology, industry, and agriculture ,030232 urology & nephrology ,Titanium alloy ,equipment and supplies ,Engineering (General). Civil engineering (General) ,[SPI.MAT]Engineering Sciences [physics]/Materials ,03 medical and health sciences ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Fracture (geology) ,TA1-2040 ,Deformation (engineering) ,Composite material ,ComputingMilieux_MISCELLANEOUS - Abstract
Titanium alloys possessing Twinning and Transformation Induced Plasticity effects show promising mechanical properties, particularly high ductility, hardenability, impact and fracture toughness. This work focuses on a strain-transformable, coarse-grained β-Ti-Cr-Sn alloy displaying TWIP effect. To account for the enhanced properties of this alloy, compared to more conventional β-Ti alloys, fracture and deformation features were correlated at different scales. Examinations evidenced a major role of twinning and, more generally, of plasticity-induced phenomena in the ductile fracture process. The resistance of this alloy to plastic deformation (work-hardening), and to crack initiation and propagation is interpreted in view of the progressive, multiscale twinning mechanisms that occur up to the very final stages of fracture.
- Published
- 2020
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