Processing of 2090 Aluminum Alloy for Superplasticity

Abstract

The applicability of a thermomechanical process, involving warm rolling to facilitate continuous recrystallization (CRX), to aluminum alloy 2090 was considered. The thermomechanical process has been shown to result in 2-5mm grains and superplasticity at 300C in Al-Mg and Al-Mg-Li alloys. In this study, the warm rolling temperature and the reheating time between consecutive rolling passes were varied. Superplastic ductility of 320 percent was obtained during tension testing at 350C. Microstructural analysis of the structures produced during warm rolling indicates inadequate interaction between precipitating phases and dislocation structures. Thus, improved warm-temperature superplastic ductility may be obtained by initial precipitation treatments followed by warm rolling.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA200425

Entities

People

  • Henry C. Regis

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aircraft Industry
  • Aircrafts
  • Airframes
  • Alloys
  • Aluminum Alloys
  • Chemistry
  • Cold Working
  • Engineering
  • Fighter Aircraft
  • Materials
  • Materials Engineering
  • Mechanical Engineering
  • Mechanical Properties
  • Mechanical Working
  • Modulus Of Elasticity
  • Tensile Strength
  • Tensile Testing

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.