Mechanical properties evaluation of some commercial beryllium materials

Conference · Wed Jun 30 04:00:00 EDT 1982

OSTI ID:5042267

Goldberg, A; Hanafee, J E; Scott, R G

The integrity of a beryllium component that had developed questionable etching patterns on chemical milling is evaluated. The tensile properties of the beryllium material, which was vacuum hot-pressed (VHP), and the same material after an additional hot isostatic pressing (VHP/HIP) were compared to the properties obtained on two acceptable beryllium materials. Tensile testing was performed under strain-rate control conditions at approx. 1 x 10/sup -4/ and 2 x 10/sup -2//s at -22/sup 0/, 22/sup 0/, and 55/sup 0/C. The tensile properties of the four materials fell within specifications and no obvious differences in their ductilities were observed. However, differences in strength values were obtained. In addition, yield drops were observed for the reference materials, while the VHP and VHP/HIP materials showed only a small inflection in strain-hardening following initial yielding. Both the yield drop and inflection in strain-hardening became more pronounced with an increase in temperature.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5042267
• Report Number(s): UCRL-87392; CONF-820459-3; ON: DE82020851
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALKALINE EARTH METALS
BERYLLIUM
ELEMENTS
MECHANICAL PROPERTIES
METALS
TENSILE PROPERTIES
YIELD STRENGTH