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

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 pass/fail 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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2015
Accession Number
ADA617012

Entities

People

  • Franklin Kellogg
  • Honag Nguyen
  • Scott M. Grendahl
  • Shuying Zhu
  • Stephen Jones

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Aerospace Industry
  • Aircraft Equipment
  • Department Of Defense
  • Embrittlement
  • Experimental Design
  • Ferrium
  • Geometry
  • Heat Treatment
  • Hydrogen Embrittlement
  • Manufacturing
  • Materials
  • Performance Tests
  • Risk Analysis
  • Tensile Strength
  • Test And Evaluation
  • Test Methods
  • Three Dimensional

Readers

  • Analytical Chemistry
  • Metallurgy
  • Systems Analysis and Design