Accession Number:

ADA214061

Title:

Advanced Tribological Coatings for High Specific Strength Alloys

Descriptive Note:

Interim rept. no. 5

Corporate Author:

NATIONAL CENTRE OF TRIBOLOGY RISLEY (UNITED KINGDOM)

Personal Author(s):

Report Date:

1989-09-29

Pagination or Media Count:

122.0

Abstract:

The objective of this contract are to develop and test a surface treatment suitable for the hardening of a titanium alloy precision gear for use in a vacuum environment. Attention has been primarily directed at surface hardening by the interstitial diffusion of the elements nitrogen, oxygen and carbon. Targets of a surface hardness of 500 HV and depth 50 microns, without the need of any post heat treatment operations have been identified. The surface treatments under study have been applied to specimens of IMI 318 Ti6AL4V, cut from plate. The sample numbers and corresponding surface treatments which have been carried out and tested to date are listed in Table 1. SHT indicates that the plates sample was in a solution heat treated condition before surface treatment.HG indicates that the sample was in a hardened and ground condition before surface treatment. Keywords Surface roughness Measurements Metallography Thickness Friction Wear Graphs Photographs.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Properties of Metals and Alloys
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE