Accession Number : AD0822595

Title :   PREPARATION AND INVESTIGATION OF HIGH-STRENGTH WIRES.

Descriptive Note : Summary technical rept. no. 3, 31 May-31 Dec 66,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Pfouts, W. R. ; Moazed, K. L.

Report Date : AUG 1967

Pagination or Media Count : 50

Abstract : An investigation was conducted to determine the effect of oxide scale on the tensile properties of iron wires. Wires were oxidized at 700 and 800 C in a controlled argon-hydrogen-water vapor atmosphere in which both wustite (FeO) and magnetite (Fe3O4) were formed. X-ray analysis showed that the amount of Fe3O4 in the scale decreases with (1) increasing PH2/PH2O and (2) increasing temperature. The amount of Fe3O4 in the scale varied from 0 to 10 percent. During mechanical testing of oxidized wires, the following factors were found to increase the strength levels of the wires: (1) increasing the PH2/PH2O ratio, (2) decreasing the oxidizing time, and (3) decreasing the oxidizing temperature. The yield strength was significantly increased by the oxide coating, but the stress and strain to fracture and the rate of work hardening were slightly decreased by the oxide scale. (Author)

Descriptors :   (*WIRE, TENSILE PROPERTIES), (*OXIDATION, WIRE), IRON, IRON OXIDES, OXYGEN, PHASE DIAGRAMS, TEMPERATURE, WATER VAPOR, FURNACES.

Subject Categories : Physical Chemistry
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE