Analysis of elevated temperature cyclic deformation of austenitic stainless steels

Conference · Sat Jan 01 00:00:00 EST 1977

OSTI ID:7212280

Rohde, R W; Swearengen, J C

The stress relaxation behavior of 304 and 316 stainless steels during cyclic deformation at 538 and 650/sup 0/C with various hold times and strain amplitudes has been analyzed in terms of a power-law equation of state which includes internal stress and drag stress as structure variables. At 650/sup 0/C the internal sress in 304 appears to be zero and microstructural recovery plays an important role in the kinetics of stress relaxation. For deformation at 538/sup 0/C, the internal stress in 304 is nonzero and microstructural recovery appears minimal. In 316 tested at 650/sup 0/C the internal stress is zero and again recovery is important. However, the kinetics of recovery differ from those measured in 304. These observations are explained physically in terms of strain and temperature-induced recovery of the structural variables, and provide insights into the procedures for calculating accumulated ''creep'' damage in reactor components.

• Research Organization: Sandia Labs., Albuquerque, N.Mex. (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 7212280
• Report Number(s): SAND-76-5888C; CONF-770807-17; TRN: 77-019123
• Resource Relation: Conference: 4. international conference on structural mechanics in reactor technology, San Francisco, California, United States of America (USA), 15 Aug 1977
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304
STRESS RELAXATION
STAINLESS STEEL-316
AUSTENITE
CREEP
DEFORMATION
HIGH TEMPERATURE
REACTOR MATERIALS
ALLOYS
CARBON ADDITIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
ELASTICITY
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MOLYBDENUM ALLOYS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
TENSILE PROPERTIES
THERMOELASTICITY
360103* - Metals & Alloys- Mechanical Properties