INVESTIGATION OF ALLOYS OF MAGNESIUM AND THEIR PROPERTIES. PART II. THERMAL AND ELECTRICAL PROPERTIES OF MAGNESIUM BASE ALLOYS. Period covered March 1956 to January 1957

Technical Report · Wed May 01 04:00:00 EDT 1957

OSTI ID:4349580

Baker, H

The electrical resistivities for cast AZ3lA & B, AZ63A, AZ8lA, AZ9lC, AZ92A, AM100A, EK30A, EK41A, EZ33A. HK31A, rolled HK31A and HM21XA, and cast HZ32A were determined at room temperature and in some cases up to 500 deg F The values at 68 deg F ranged from l7.2 microhm/cm/sup 3/ for AM100A-T4 to 9.2 microhm/cm/sup 3/ for AZ31A & B-F & -T4 and from 7.7 microhm/cm/sup 3/ for cast HK31A-T6 to 5.0 ranged from 11.6 microhm/cm/sup 3/ for EK41A-T6 to 9.1 containing alloys. Room temperature resistivity measurements on cast EM31 and EK31 ranged between 7.8 and 5.5 The temperature coefficients of electrical resistivity were fairly constant, ranging from 0.8 to 1.0 microhm/cm/sup 3/- deg F. Calculations of thermal conductivity from electrical data are reported for AZ31A & B, AZ63A, AZ81A, AZ91C, AZ92A, AM100A, EK30A, EK41A, EZ33A, HK31A, HM21XA, and HZ32A. The temperature coefficients of thermal conductivity were all positive and decreased with increasing temperature. Enthalpy, specific heat, and heat of fusion were measured for AZ31B, HK31A, HM21XA, HM31XA, and ZK60A. The heat of fusion seemed to decrease with increasing alloy content from 82 cal/gm for HM2lXA to 76 cal/gm for ZK60A. At temperatures around 500 deg F the specific heats of the alloys were about the same as that of pure Mg except the specific heat of AZ31B which was somewhat higher. (auth)

• Research Organization: Dow Chemical Co., Midland, Mich.
• NSA Number: NSA-12-001401
• OSTI ID: 4349580
• Report Number(s): WADC-TR-57-194(Pt.II); AD-1310
• Country of Publication: United States
• Language: English

Related Subjects

MINERALOGY, METALLURGY, AND CERAMICS