Thermomechanical Treatments on High Strength Al-Zn-Mg(-Cu) Alloys

Abstract

An investigation was carried out to determine the metallurgical properties of Al-Zn-Mg and Al-Zn-Mg-Cu alloy products processed according to newly developed Final Thermomechanical Treatments (FTMT) of T-AHA type. The results show that these cycles can be utilized to produce wrought products of high purity Al-Zn-Mg(-Cu) alloys characterized by equivalent toughness and ductility and much higher strength than conventionally processed commercial purity materials. Based on transmission electron microscopy studies, it was found that such improved behavior of FTMT material is attributable to the superposition of hardening effects, from aging precipitation and from dislocations. Preliminary stress-corrosion and fatigue tests indicate that these properties are not substantially influenced by T-AHA thermomechanical process. Further work is needed in this area, in order to better understand the directions to follow for developing better alloys.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADA491180

Entities

People

  • E. Di Russo
  • F. Gatto
  • M. Conserva

Organizations

  • Frankford Arsenal

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Aluminum Alloys
  • Corrosion Resistance
  • Electron Microscopy
  • Engineered Materials
  • Hardening
  • Materials
  • Materials Engineering
  • Materials Laboratories
  • Materials Science
  • Mechanics
  • Military Research
  • Standards
  • Stress Corrosion
  • Tensile Properties
  • Tensile Strength
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.

Technology Areas

  • Microelectronics