Accession Number : AD0285290

Title :   MATERIAL - HK31A MAGNESIUM ALLOY - MECHANICAL PROPERTIES OF

Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s) : NORDQUIST,F.C.

Report Date : 22 FEB 1956

Pagination or Media Count : 1

Abstract : Specimens of Mg alloy were tested to determine the mechanical properties at 450, 650, 750, and 900 F after being held at these temperatures for two minutes, and the effect on the mechanical properties at 450 F after a two-minute exposure to 550, 750, and 900 F. The mechanical properties investigated were Ftu, Fty, Fcy, e, Et, and Ec. A standard high temperature tensile specimen was used for the tensile tests and a newly designed compression specimen was used for the compression tests. The testing showed that the material in the -T6 condition had better mechanical properties at test temperatures over 450 F than did the -H24 condition. The -T6 condition maintains a relatively high modulus of elasticity of 4.5 x 10 to the 6th power at 750 F, while the H24 condition is down to 1.7 x 10 to the 6th power. The ultimate strength at 450 F after a 900 F exposure for two minutes is the same for both the -T6 and H24 conditions. The recovery strength tests conducted at 450 F showed that the -H24 condition consistently had a higher yield strength than that of the -T6 material after short time exposures to various temperatures between 450 and 900 F. (Author)

Descriptors :   *MAGNESIUM ALLOYS, ALLOYS, ELASTIC PROPERTIES, HEAT TREATMENT, STRESSES, TEMPERATURE, TENSILE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE