Wear and surface residual stress evolution on twin-disc tests of rail/wheel steels

• Autor(a) principal: Batista, António Castanhola
• Data de Publicação: 2014
• Outros Autores: Peixoto, Daniel F.C., Nobre, João P., Coelho, Luís Manuel de Jesus, Ramos, Diogo Mesquita, Ferreira, Luis A.A., Castro, Paulo M.S.T. de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.8/1276
• topic: Residual stresses; Rolling contact fatigue; Steel; Railway; Twin disc machine; X-ray diffraction

Twin disc tribological tests were performed in wheel and rail materials, with specimens taken from a Spanish AVE train wheel and a UIC60 rail, in a program intended to characterize their contact fatigue behavior. The X-ray diffraction technique was used to characterize the residual stress distribution at the initial and damaged stages, as well as in intermediate stages, since existing residual stresses in the surface layers of the railways steels and its evolution during contact loading can have a major influence on crack initiation and propagation.