DEFORMATION SUBSTRUCTURE AND SUSCEPTIBILITY TO INTERGRANULAR STRESS CORROSION CRACKING IN AN ALUMINUM ALLOY

DISLOCATION ARRANGEMENTS IN A DEFORMED ALUMINUM ZINC- MAGNESIUM-COPPER ALLOY AGED TO VARIOUS STATES OF SUSCEPTIBILITY TO STRESS CORROSION CRACKING HAVE BEEN EXAMINED BY TRANSMISSION ELECTRON MICROSCOPY. MATERIAL IN A HIGHLY SUSCEPTIBLE CONDITION DEFORMS IN A CHARACTERISTIC MANNER. SLIP IS CONCENTRATED IN WELL DEFINED BANDS AND DISLOCATIONS SHOW A MARKED TENDENCY TO REMAIN ON THEIR ORIGINAL SLIP PLANES. IN MATERIAL EXHIBITING A LOW SUSCEPTIBILITY, RESTRICTED SLIP DOES NOT OCCUR AND DISLOCATIONS FORM UNIFORMLY DISTRIBUTED TANGLES. THESE RESULTS ARE INTERPRETED IN TERMS OF EXISTING MODELS FOR INTERGRANULAR STRESS CORROSION CRACKING. IT IS CONCLUDED THAT WHEN THIS ALLOY IS AGED TO CONTAIN G.P. ZONES OR COHERENT PRECIPITATES IT IS SUSCEPTIBLE TO STRESS CORROSION CRACKING, WHEREAS WHEN AGED TO CONTAIN NON-COHERENT PRECIPITATES THE ALLOY WILL BE HIGHLY RESISTANT. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00109312
• Supplemental Notes:
  • Vol 23, No 6, PP 173-179
• Authors:
  • Holl, H A
• Publication Date: 1967-6

Media Info

• Serial:
  • CORROSION
  • Publisher: NACE International
  • ISSN: 0010-9312

Subject/Index Terms

• TRT Terms: Aluminum alloys; Corrosion; Deformation; Dislocations; Electron microscopes; Fracture mechanics; Precipitation (Chemistry); Slip (Fluid mechanics); Stress corrosion; Substructures; Zinc alloys
• Uncontrolled Terms: Slips
• Old TRIS Terms: Bands; Intergranular corrosion; Precipitates
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216249
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 10 2004 5:49PM