Accession Number:

AD0600925

Title:

RESEARCH AND DEVELOPMENT ON HIGH-PRESSURE HIGH-TEMPERATURE METALLURGY.

Descriptive Note:

Rept. for Dec 62-Dec 63

Corporate Author:

MANLABS INC CAMBRIDGE MASS

Report Date:

1964-04-01

Pagination or Media Count:

100.0

Abstract:

Techniques were developed for preparing, treating and testing sub-size tensile and Charpy impact specimens suitable for use in high-pressure equipment. The mechanical properties of a wide variety of materials including plain carbon steels, aluminum, stainless steel, and beryllium which were pressure-cycled at room temperature were measured and compared to properties obtained on the same materials which had not been pressure-cycled. A study was made of the effects of pressure on the mechanical properties of several steels including 4320, 4340 and H-11 austenitized normally, and then tempered at pressure and temperatures in the range of 200 C to 500 C. Attempts to austenitize test specimens at pressure invariably resulted in severe microcracking which precluded measurements of tensile and fracture toughness properties. A series of high-purity ironcarbon alloys ranging from 0.12C to 1.33Cwere austenitized and isothermally transformed both at one atmosphere and at 42 kilobars at selected transformation temperatures. The mechanical properties of specimens subjected to these treatments were measured. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE