Advanced Tribological Coatings for High Specific Strength Alloys

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.'H&G' indicates that the sample was in a hardened and ground condition before surface treatment. Keywords: Surface roughness; Measurements; Metallography; Thickness; Friction; Wear; Graphs; Photographs.

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Document Details

Document Type
Technical Report
Publication Date
Sep 29, 1989
Accession Number
ADA214061

Entities

People

  • M. K. Vine

Tags

DTIC Thesaurus Topics

  • Alloys
  • Coatings
  • Friction
  • Hardening
  • Hardness
  • Heat Treatment
  • High Temperature
  • Materials
  • Measurement
  • Microhardness
  • Micrometers
  • Roughness
  • Surface Finishing
  • Surface Roughness
  • Thermosetting Plastics
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Business Analytics
  • Materials Science (Mechanical Engineering).
  • Surface Coatings Technology.