Accession Number:

ADA617012

Title:

Design of Experiment Approach to Hydrogen Re-embrittlement Evaluation WP-2152

Descriptive Note:

Final rept. Jan 2011-Aug 2014

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Report Date:

2015-04-01

Pagination or Media Count:

64.0

Abstract:

A 3-phase design-of-experiment approach was used to investigate hydrogen re-embrittlement effects of common aviation maintenance chemicals and coatings. Both material and geometry were examined to uncover the best constraints for a novel method. While traditional testing uses a passfail approach, the developed method employed load monitoring cells over a range of material strength, hydrogen-emitting environment, and applied load. This method allowed prospective solvent replacement chemicals and cadmium replacement coatings to be finely delineated in terms of performance and formed the basis of a tool for predicting time to failure under any combination of parameters. In the aviation community, heavy restriction on using alternative chemicals and coatings could therefore be eased, and applications could be expanded for using highstrength steel.

Subject Categories:

  • Inorganic Chemistry
  • Coatings, Colorants and Finishes
  • Properties of Metals and Alloys
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE