Accession Number : ADD014018

Title :   Magnesium-Calcium-Nickel/Copper Alloys and Articles.

Descriptive Note : Patent, Filed 1 Oct 87, patented 13 Sep 88,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Hehmann, Franz J ; Krishnamurthy, Setumadhavan ; Robertson, Erica ; Savage, Steven J ; Froes, Francis H

Report Date : 13 Sep 1988

Pagination or Media Count : 3

Abstract : This invention relates to magnesium base alloys. In one aspect this invention relates to novel magnesium base alloys. Magnesium alloys are best known for their light weight and high strength-to-weight ratio. Accordingly, they are used generally in application where weight is a critical factor and where high mechanical integrity is required. A novel magnesium alloy consisting essentially of about 6 to 14 weight percent calcium, about 4 to 8 weight percent of copper or nickel, balance magnesium. There is also provided a process for producing a magnesium alloy article having improved properties which comprises the steps of providing a rapidly solidified product having the composition defined above and having a maximum average thickness of about 200 microns in at least one dimension, introducing the rapidly solidified product into a mold, and consolidating the rapidly solidified product to obtain a desired densification of rapidly solidified product. Consolidation may be carried out by hot isostatic pressing (HIP'ing) the rapidly solidified product at a pressure of about 100 to 300 MPa and a temperature of about 150 to 350 C. for a time sufficient to obtain the desired densification. Alternatively, consolidation may be accomplished by extrusion using the same temperature range, and an extrusion ratio of about 10:1 to 30:1. Keywords: Patents. (KT)

Descriptors :   *CALCIUM, *COPPER, *MAGNESIUM ALLOYS, *PATENTS, *NICKEL, *METALLURGY, BALANCE, DENSITY, EXTRUSION, HIGH RELIABILITY, HOT PRESSING, ISOSTATIC PRESSING, LIGHTWEIGHT, MAGNESIUM, MECHANICAL PROPERTIES, NICKEL, RANGE(EXTREMES), RATIOS, SOLIDIFICATION, STRENGTH WEIGHT RATIO, TEMPERATURE, THICKNESS

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE