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Deformation-induced martensitic transformation in Co-28Cr-6Mo alloy produced by...
Antunes, Luiz Henrique Martinez; Quintero, John Jairo Hoyos; Andrade, Tathiane Caminha; Sarvezuk, Paulo Willian Carvalho; Wu, Leonardo; Ávila, J.A.The wear resistance of the biomedical low-carbon Co-28Cr-6Mo (wt.-%) alloy is primarily determined by the onset and magnitude of the face-centered cubic to hexagonal close-packed deformation-induced martensitic phase transformation. In metal-on-metal joint bearings, local plastic deformation occurs on the surface and in the subsurface regions. This can cause deformation-assisted structural changes in the materi...
Kinetics of reverted austenite in 18 wt.% Ni Grade 300 Maraging steel: an in-si...
Santos, Luis Paulo Mourão dos; Béreš, Miloslav; Castro, Mirela Oliveira de; Sarvezuk, Paulo Willian Carvalho; Wu, LeonardoIn this study, we investigated the transformation kinetics of martensite fi reverted austenite in 18 wt.% grade 300 Ni maraging steel. The kinetics was evaluated based on the in situ synchrotron x-ray diffraction data collected during isothermal heat treatment at 570C. The onset of transformation martensite fi reverted austenite was detected after 5 min of aging. The austenite fraction increased as a function o...
Kinetics of Reverted Austenite in 18 wt.% Ni Grade 300 Maraging Steel: An In-Si...
Santos, Luis Paulo Mourão dos; Béreš, Miloslav; Castro, Mirela Oliveira de; Sarvezuk, Paulo Willian Carvalho; Wu, LeonardoIn this study, we investigated the transformation kinetics of martensite → reverted austenite in 18 wt.% grade 300 Ni maraging steel. The kinetics was evaluated based on the in situ synchrotron x-ray diffraction data collected during isothermal heat treatment at 570°C. The onset of transformation martensite → reverted austenite was detected after ~ 5 min of aging. The austenite fraction increased as a function ...
Mechanical and phase transformation behaviour of biomedical Co-Cr-Mo alloy fabr...
Béreš, Miloslav; Silva, C.C.; Sarvezuk, Paulo Willian Carvalho; Wu, Leonardo; Antunes, Luiz Henrique Martinez; Jardini, André LuizBiomedical cobalt-chromium-molybdenum (Co-Cr-Mo) alloys have been used in the cast or wrought form as prosthetic implant materials for more than five decades. Recently, additive manufacturing techniques are employed to produce parts directly from metal precursor powder with a composition suitable for biomedical applications. In the work present, we examine both mechanical behaviour and γ→ε phase transformation ...
Estudo do sistema quase unidimensional AxA'1-xNb2O6 (A e A'=Ni, Fe e Co) : prep...
Sarvezuk, Paulo Willian CarvalhoCette étude expérimentale est consacrée à la structure cristalline et aux propriétés magnétiques des phases orthorhombiques ANb2O6 (A = métaux magnétiques) qui ont retenues notre attention en tant que système Ising modèle quasi 1D. Ce comportement magnétique original de basse dimension résulte à la fois de la force des interactions magnétiques le long des chaînes d'atomes magnétiques quasi-unidimensionnelles, e...