Interim structural-design standard for solar-energy applications (evaluation of ANL tests)

Technical Report · Mon Feb 01 04:00:00 EST 1982

OSTI ID:5228653

Rao, M S.M.

The evaluation of tests on Type 316H stainless steel and Incoloy 800 by Argonne National Laboratory (ANL) is reported. The background and task description of the program are reviewed and the details of analyses are described. The results of evaluation of ANL tests are discussed. The creep ratcheting strain of the zero-hold-time tests was predicted by using the book and actual hardened material properties as measured from the tests. The mean stress shift for uniaxial strain cycling with hold-times in one direction was studied. An elastic-plastic-creep analysis was conducted for each hold-time test to determine the stress range and the extent of creep ratcheting by using the book and actual hardened material properties. The creep-fatigue life of each ANL test was determined analytically by using the ASME Code. All the results were compared to the experimental data of the ANL tests. Accurate determination of the creep law in the primary creep regime is important for the consideration of creep ratcheting. In the cases of a biaxial stress field, the analysis using material properties as determined by tests on uniaxial specimen do not necessarily yield a conservative estimate of creep ratcheting strain. The mean stress shift observed in the analysis was small. This was less than 10% of the stress range for all cases. An estimate of creep-fatigue damage at failure of all tests approximately follows the bilinear interaction curve for Type 316H Stainless Steel and the linear interaction curve for Incoloy 800. The factor of safety over the fatigue damage as determined by ASME Code was between 4 and 20 for Type 316H stainless steel and between 8 and 50 for Incoloy 800.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Foster Wheeler Development Corp., Livingston, NJ (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5228653
• Report Number(s): SAND-80-8193; ON: DE82008768
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140700 -- Solar Thermal Power Systems
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
DEFORMATION
FATIGUE
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
RATCHETING
STAINLESS STEEL-316
STAINLESS STEELS
STEELS
STRAINS
STRESSES
TESTING