Tribological behavior of a heat-treated cobalt-based alloy

Y. Bedolla-Gil, M. A.L. Hernandez-Rodriguez

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The present study reviews the tribological behavior of a Co-Cr-Mo alloy regarding to microstructural changes caused by solution and aged heat treatments. The influence of microstructure on wear resistance was assessed in a pin-on-disk configuration. It was found that after a long solution heat treatment of 6 h at 1200 C, most of the carbides were dissolved into the matrix, and coarse grain size was obtained. Solution treatment for 1 h presented fine grains and globular carbides along the matrix. Aging at 850 C resulted in a quantity of phase transformation which was different from austenite face cubic centered to martensite hexagonal close packed (HCP); 35% of HCP was reached during 8 h of treatment and 60% for 15 h. As-cast condition and 6-h solution heat treatment exhibited the greatest wear loss, while 1-h solution treatment and samples containing HCP phase showed a threefold lower wear.

Original languageEnglish
Pages (from-to)541-547
Number of pages7
JournalJournal of Materials Engineering and Performance
Volume22
Issue number2
DOIs
Publication statusPublished - Feb 2013
Externally publishedYes

Bibliographical note

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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