Autor segons l'article: Younes, A.; de la Flor, S.; Clark, S. J.; Nutter, J.; Birkett, M.; Watson, J. O.; Unthank, M.; Gonzalez, Sergio;
Departament: Enginyeria Mecànica
Autor/s de la URV: De la Flor Lopez, Silvia
Paraules clau: Wear Stress Sliding Martensitic-transformation Bulk metallic-glass Adhesion Abrasion
Resum: 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.
Àrees temàtiques: 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
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: silvia.delaflor@urv.cat
Identificador de l'autor: 0000-0002-6851-1371
Data d'alta del registre: 2024-09-07
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
Enllaç font original: https://asmedigitalcollection.asme.org/tribology/article-abstract/144/2/021706/1119383/Tribological-Behavior-of-Microalloyed-Cu50Zr50?redirectedFrom=fulltext
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Journal Of Tribology-Transactions Of The Asme. 144 (2):
Referència 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
DOI de l'article: 10.1115/1.4052363
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2022
Tipus de publicació: Journal Publications