Accession Number:
AD0756903
Title:
Thermal Stress Behavior of Polycrystalline Graphite. Part III. Special Purpose Tests.
Descriptive Note:
Technical rept. Dec 71 - Nov 72,
Corporate Author:
TRW SYSTEMS GROUP REDONDO BEACH CALIF
Personal Author(s):
Report Date:
1972-12-01
Pagination or Media Count:
89.0
Abstract:
The results obtained in the final phase of a program to evaluate the thermal stress behavior of ATJ-S and AXF-5Q graphite are described. Among the questions examined were 1 the reasons for an observed discrepancy between the measured and calculated strains in the uniaxial thermal stress tests on ATJ-S graphite 2 the susceptibility of ATJ-S to stress reversal fracture 3 the influence of prestressing on thermal stress test results and 4 the influence of biaxial softening on the calculated thermal stress and strain values. An elevated temperature torsion test facility with a capacity for rapid heat-up to test temperature is described and results obtained in tests on 5 ATJ-S specimens are presented. The development of a 200 KW thermal stress testing facility which uses electron beam teachniques for outside diameter heating is also described. Author Modified Abstract
Descriptors:
Subject Categories:
- Ceramics, Refractories and Glass
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