Development of an Al-Mg-Li Alloy

reportActive / Technical Report | Accession Number: ADA034954 | Open PDF

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.

Author(s):
Sanders, Jr, T. H.
Author Organization(s):
ALUMINUM CO OF AMERICA ALCOA CENTER PA PHYSICAL METALLURGY DIV
Descriptive Note:
Final rept.
Pagination:
0154

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
56-76-AH352, NADC-76397-30
Contract/Grant Number(s):
N62269-74-C-0438
Monitor Series:
76397-30, NADC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.1.2_Wireless Transmission; JCA_6_Net Centric; JCA_6.1.1_Wired Transmission; JCA_1_Force Support; JCA_4.5.4_Requirements Definition; JCA_4.5_Operational Contract Support; JCA_6.1_Information Transport; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2_Force Preparation; JCA_3.2.1_Kinetic Means; JCA_1.2.3_Educating; JCA_4.6_Engineering; JCA_1.2.5_Lessons Learned; JCA_1.3_Human Capital Management; JCA_5.2_Understand; JCA_8_Building Partnerships
Modernization Areas:
Fully Networked C3
Communities of Interest:
Weapons Technologies
Descriptor(s):
*ALUMINUM ALLOYS, *CORROSION RESISTANT ALLOYS, *LITHIUM ALLOYS, *MAGNESIUM ALLOYS, CASTING, CHEMICAL COMPOSITION, CHROMIUM, DENSITY, EXTRUSION, FRACTURE(MECHANICS), HARDENING, LITHIUM, MAGNESIUM, MANGANESE, MECHANICAL PROPERTIES, MODULUS OF ELASTICITY, PRECIPITATION, STRENGTH(MECHANICS), TENSILE PROPERTIES, TOUGHNESS, ZIRCONIUM
Field(s)/Group(s):
Properties of Metals and Alloys
Keyword(s):
ALUMINUM ALLOY 35 MG 25LI
Report Date:
1976 Jun 09