TY - JOUR
T1 - Deformation-induced martensitic transformation in Co-28Cr-6Mo alloy produced by laser powder bed fusion
T2 - Comparison surface vs. bulk
AU - Antunes, Luiz H. M.
AU - Hoyos, John Jairo
AU - Andrade, Tathiane Caminha
AU - Sarvezuk, Paulo Willian C.
AU - Wu, L.
AU - Ávila, Julian A.
AU - Oliveira, João Pedro
AU - Schell, Norbert
AU - Jardini, A. L.
AU - Žilková, Jaroslava
AU - da Silva Farina, Paula F.
AU - Abreu, Hamilton Ferreira Gomes
AU - Béreš, Miloslav
N1 - info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00667%2F2020/PT#
Funding Information:
The authors are grateful to Professor D. Dye from Imperial College London for his helpful discussions. The authors would like to acknowledge the experimental support of F.E. Montoro, Dr. C. Ospina, Dr. O.R. Bagnato, and Dr. A.L. Gobbi (projects SEM-26162, TEM-26161, LMF 20869) at the Brazilian Nanotechnology National Laboratory (LNNano). The assistance of J.L. Lisboa from Unicamp/Campinas with mechanical tests and Dr. J.R. de Barros Neto from Federal University of Piau?/Teresina with EBSD data analysis is also acknowledged. Microstructural characterization of the specimens was performed at LNNano and the Central Anal?tica UFC/CT-INFRA-FINEP/Pro-Equipamentos-CAPES/CNPq-SisNano-MCTI 2019(Grant 442577/ 2019-2)-INCT-FUNCAP. This study used the resources of the Brazilian Synchrotron Light Laboratory (LNLS) (project 20170162), an open national facility operated by the Brazilian Center for Research in Energy and Materials for the Brazilian Ministry for Science, Technology, Innovations, and Communications. The research leading to this result has been supported by the project CALIPSOplus, Germany, under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020, European Union (proposal I-20160912).
Funding Information:
This work was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior , Brazil, Finance Code 001 , and Fundação para a Ciência e a Tecnologia (FCT - MCTES), Portugal, via the project UIDB/00667/2020 (UNIDEMI). The research leading to this result has been supported by the project CALIPSOplus , Germany, under the Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020 , European Union (proposal I-20160912 ).
Publisher Copyright:
© 2021 Elsevier B.V.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/10
Y1 - 2021/10
N2 - 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 material, such as mechanical twinning and/or martensitic transformation. In the present work, we report the structural transition on the surface and bulk of a laser powder bed fusion additively manufactured Co-28Cr-6Mo alloy in response to an externally imposed load. This study was possible using in-situ synchrotron X-ray diffraction at two different energy levels. Our results revealed that from tensile deformation to fracture, the phase transformation kinetics and magnitude were marginally higher on the surface. During transformation, {200}FCC peak broadening was observed in the bulk and this was attributed to stacking fault accumulation.
AB - 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 material, such as mechanical twinning and/or martensitic transformation. In the present work, we report the structural transition on the surface and bulk of a laser powder bed fusion additively manufactured Co-28Cr-6Mo alloy in response to an externally imposed load. This study was possible using in-situ synchrotron X-ray diffraction at two different energy levels. Our results revealed that from tensile deformation to fracture, the phase transformation kinetics and magnitude were marginally higher on the surface. During transformation, {200}FCC peak broadening was observed in the bulk and this was attributed to stacking fault accumulation.
KW - CoCrMo alloy
KW - in-situ synchrotron X-ray diffraction
KW - Martensitic phase transformation
KW - Peak broadening
KW - Variant selection
UR - http://www.scopus.com/inward/record.url?scp=85107783187&partnerID=8YFLogxK
U2 - 10.1016/j.addma.2021.102100
DO - 10.1016/j.addma.2021.102100
M3 - Article
AN - SCOPUS:85107783187
SN - 2214-8604
VL - 46
JO - Additive Manufacturing
JF - Additive Manufacturing
M1 - 102100
ER -