Glycol Quenching Evaluation Program. Metallurgical Integrity of Fire Damaged 7075 Aluminum Alloy Parts.

Abstract

Three crash-damaged 7075 Aluminum Alloy extrusions were re-heat treated, using a 26% polyalkylene glycol and water solution as a quenching medium. This was done to determine the process suitability for controlling the cooling rate and reducing the incidence of high stress areas. This process change tended to equalize surface conditions, minimize the chances of stress corrosion cracking and decreased the amount of distortion. Two of the three parts that were heat treated as a part of this program were returned to NARF-North Island and were certified, after examination, to be in RFI condition. The third of the three parts has been sectioned and tested for tensile strength, exfoliation corrosion and fatigue life. These tests have shown no adverse effects on 7075 Aluminum Alloy from the reheat treatment or the synthetic quenchant.

Document Details

Document Type
Technical Report
Publication Date
May 17, 1974
Accession Number
ADA013270

Entities

People

  • L. W. Allen
  • R. H. Pugh

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Corrosion
  • Fatigue Life
  • Quenching
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Surface Properties
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Petroleum Engineering
  • Powder metallurgy of Titanium alloys.