0
research-article

Tribological characterization of N 80A and 21-4N valve materials against GGG-40 seat material under dry sliding conditions at temperatures to 500 0C

[+] Author and Article Information
Shahid Saleem Sheikh

Tribology Laboratory, Mechanical Engineering Department, National Institute of Technology Srinagar, Hazratbal, Srinagar, Kashmir - 190006, J&K (India)
shahid@nitsri.net

Mohd Farooq Wani

Tribology Laboratory, Mechanical Engineering Department, National Institute of Technology Srinagar, Hazratbal, Srinagar, Kashmir - 190006, J&K (India)
mfwani@nitsri.net

1Corresponding author.

ASME doi:10.1115/1.4036273 History: Received October 22, 2016; Revised February 27, 2017

Abstract

Friction and wear studies of Nimonic 80A and 21-4N valve materials against GGG-40 under dry sliding conditions, at temperatures ranging from 50 oC to 500 oC, are presented in this paper. Friction coefficient was found to continuously decrease with time for all tests with prominent running-in behavior seen in the 50 oC and 500 oC tests. Higher friction coefficient and wear was observed at 300 oC, as compared to that at 50 oC and 500 oC. Formation of oxide Fe3O4, at 300 oC, was confirmed by Raman spectroscopy, which resulted in a higher friction coefficient and wear. Raman spectroscopy further revealed the presence of a-Fe2O3, hematite, in most cases, with presence of oxides of Ni-Cr and Ni-Fe as well. EDS results on the samples confirmed the same. Wear at 500 oC was found to be the least for both the valve materials with SEM confirming the formation of well developed glaze layers.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In