Mechanical properties evaluation of some commercial beryllium materials
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
- Resource Relation:
- Conference: Beryllium subwog meeting, Denver, CO, USA, 19 Apr 1982
- Country of Publication:
- United States
- Language:
- English
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