The Weldability of an Al-Li-Cu Alloy

Richard Martukanitz, C. A. Natalie, J. O. Knoefel

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The development of low-density aluminum-lithium alloys for aerospace applications provides industry with an attractive alternative to fiber-reinforced composites for reducing weight while maintaining the fabrication cost advantages of aluminum. In this study, gas metal arc (GMA), gas tungsten arc (GTA), and electron beam (EB) welding processes were used to evaluate the potential fusion weld-ability of alloy 2090 (Al-2.2 Li-2.7 Cu-0.12 Zr). The results indicate that, with proper filler alloy selection, 2090 may be easily welded with a low sensitivity to weld solidification cracking. The weld porosity of 2090, the source of which is hydrogen enriched surface oxides, may be eliminated by chemically or mechanically milling the surface prior to welding. The dominant modification in the heat-affected zone of 2090 weldments is dissolution of strengthening phases. This degradation is reduced by the use of high energy density heat sources, such as an electron beam, or post-weld thermal treatments.

Original languageEnglish (US)
Pages (from-to)38-42
Number of pages5
JournalJOM
Volume39
Issue number11
DOIs
StatePublished - Nov 1 1987

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Fingerprint Dive into the research topics of 'The Weldability of an Al-Li-Cu Alloy'. Together they form a unique fingerprint.

Cite this