Autor según el artículo: Younes, A.; de la Flor, S.; Clark, S. J.; Nutter, J.; Birkett, M.; Watson, J. O.; Unthank, M.; Gonzalez, Sergio;
Departamento: Enginyeria Mecànica
Autor/es de la URV: De la Flor Lopez, Silvia
Palabras clave: Wear Stress Sliding Martensitic-transformation Bulk metallic-glass Adhesion Abrasion
Resumen: Promoting the martensitic transformation through optimum microalloying with Fe and/or Mn was observed to be an effective method to enhance the wear resistance of the Cu50Zr50 at% shape memory alloy (SMA). Among all the potential microelements and concentrations, partial replacement of Cu by up to 1 at% Fe and Mn is of interest since from density functional-based calculations, large minimization of the stacking fault energy (SFE) of the B2 CuZr phase is predicted. For this reason, an effective martensitic transformation is expected. The largest decrease of the SFE from 0.36 J/m(2) to 0.26 J/m(2) is achieved with partial replacement of Cu by 0.5 at% Fe. This results in the highest martensitic transformation upon wear testing, especially at highest load (15 N) for which the mass loss is 0.0123 g compared to 0.0177 g for Cu50Zr50 and a specific wear-rate of 5.9 mm(3)/Nm, compared to 8.5 for mm(3)/Nm for Cu50Zr50. This agrees with the low coefficient of friction of 0.48 +/- 0.05 and low roughness of 0.200 +/- 0.013 mu m of the Fe-containing alloy compared to that for Cu50Zr50, 0.55 and 0.415 +/- 0.026 mu m, respectively. All the worn surfaces show the formation of abrasive grooves, being shallowest for the more wear resistant 0.5 at% Fe alloy. The second more wear resistant alloy contains 0.5 at% Mn. Wear mechanisms of abrasion, adhesion, and delamination have been identified.
Áreas temáticas: Surfaces, coatings and films Surfaces and interfaces Mechanics of materials Mechanical engineering Matemática / probabilidade e estatística Engineering, mechanical Engenharias iii Engenharias ii Ciência da computação
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: silvia.delaflor@urv.cat
Identificador del autor: 0000-0002-6851-1371
Fecha de alta del registro: 2024-09-07
Versión del articulo depositado: info:eu-repo/semantics/acceptedVersion
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Journal Of Tribology-Transactions Of The Asme. 144 (2):
Referencia de l'ítem segons les normes APA: Younes, A.; de la Flor, S.; Clark, S. J.; Nutter, J.; Birkett, M.; Watson, J. O.; Unthank, M.; Gonzalez, Sergio; (2022). Tribological Behavior of Microalloyed Cu50Zr50 Alloy. Journal Of Tribology-Transactions Of The Asme, 144(2), -. DOI: 10.1115/1.4052363
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2022
Tipo de publicación: Journal Publications