Accession Number:

ADA034954

Title:

Development of an Al-Mg-Li Alloy

Descriptive Note:

Final rept.

Corporate Author:

ALUMINUM CO OF AMERICA ALCOA CENTER PA PHYSICAL METALLURGY DIV

Personal Author(s):

Report Date:

1976-06-09

Pagination or Media Count:

154.0

Abstract:

A program to optimize composition in the Al-Mg-Li system was conducted in two phases. In Phase I, a series of alloys containing Al-3.5 Mg-2.5 Li with Cr, Mn, or Zr was investigated. The alloy containing 0.3 Mn developed the best combination of strength and notch toughness. Under Phase II, effects of Mg and Li content in the Al-Mg-Li-0.3 Mn alloy system were determined. Nine alloy combinations ranging from 1.4 to 3.1 Li and 2.0 to 4.9 Mg were evaluated. Strength and modulus increased and density decreased with increasing Li. Fracture toughness of these alloys were below minimum acceptable levels for commercial product.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE