Accession Number : AD0476712

Title :   EFFECTS OF THERMO-MECHANICAL VARIABLES ON THE TEXTURE AND BEND DUCTILITY OF HIGH PURITY BERYLLIUM SHEET.

Descriptive Note : Summary rept. 15 May 63-31 Dec 64,

Corporate Author : FRANKLIN INST RESEARCH LABS PHILADELPHIA PA

Personal Author(s) : Hoover, D. B. ; Damiano, V. V. ; Herman, M.

Report Date : DEC 1965

Pagination or Media Count : 108

Abstract : This investigation was concerned with the problem of limited bend ductility as experienced in the case where wide sheets of beryllium metal are subjected to bending stresses only to fail at surprisingly low values of plastic strain. The experimental approach to this problem was to combine the interaction effects of increased purity and low order deformation techniques in an exploratory effort to improve the bend ductility of beryllium sheet. The ultimate objective of this program is to provide beryllium sheet with compromise properties such that bend ductility is improved without an observed loss in either strength or uniaxial ductility. A high purity powder (SR grade Pechiney) was used to produce dense billets of beryllium via concentional powder metallurgy techniques. Low order deformation processes of compression rolling, hot upset and hot forging were imparted to the beryllium billets to fabricate the resultant sheet material with a random texture. The report describes in detail all salient features for powder processing, sheet fabrication, method of testing and the analytical techniques or findings. In addition, results are presented, discussed, and certain conclusions are offered. (Author)

Descriptors :   (*BERYLLIUM, DUCTILITY), BENDING, SHEETS, STRESSES, POWDER METALLURGY, MATERIAL FORMING, TEST METHODS, MECHANICAL PROPERTIES, ROLLING(METALLURGY), FORGING, HOT WORKING, MICROSTRUCTURE, POWDER METALS, HEAT TREATMENT, RADIOGRAPHY.

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE