Thermal Exposure and Environment Effects on Tension, Fracture and Fatigue of 5XXX Alloys Tested in Different Orientations

Abstract

The work involved a systematic study to determine the effects of changes in temper (e.g.H131, H116, H128), thermal exposure conditions (i.e. time, temperature), and environment (e.g. dry air, humid air, solutions) on the environmental cracking susceptibility at different loading rates in both the S-T and L-T orientations. Experiments were conducted using slow strain rate tension (SSRT), fatigue crack growth using dcPD, and experiments conducted on fatigue precracked samples to determine the effects of changes in loading rate on cracking susceptibility. In addition, access to high resolution tomography occurred via a visit to the Harwell Diamond Light Source (DLS), UK where in -situ cracking experiments were conducted as well as tomography experiments on previously tested samples. Regimes of EAC susceptibility were determined and the effects of changes in loading rate and solution on this susceptibility were determined.

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Document Details

Document Type
Technical Report
Publication Date
Dec 27, 2017
Accession Number
AD1050391

Entities

People

  • John J. Lewandowski

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Advanced Materials
  • Aluminum Alloys
  • Contracts
  • Engineered Materials
  • Engineering
  • Environment
  • Grain Boundaries
  • High Resolution
  • Materials
  • Materials Engineering
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Orientation (Direction)
  • Physical Metallurgy
  • Strain Rate
  • Tomography

Readers

  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.
  • Technical Research and Report Writing.