Low-cycle fatigue results for spot-welded AISI 316 stainless steel strip at elevated temperatures

Conference · Wed Jan 01 04:00:00 EST 1975

OSTI ID:4012095

Flagella, P N; Hundal, R

Results are reported for load-controlled, low-cycle fatigue experiments conducted on spot-welded AISI 316 stainless steel strip (0.25 mm thick) at room temperature, 538, 621, and 704$sup 0$C in air. A detailed study evaluating the effects of hold time in tension at 621$sup 0$C was also performed. Three distinct frequency regions, related to cycle dependent (fatigue) and time dependent (creep) failures, were identified. The high frequency region (1 to 200 cycles/ min) cycles to failure was essentially independent of frequency and hold time. The intermediate frequency region involved fatigue-enhanced creep and is described by a power law expression. The low frequency region is described by the creep-rupture life. Metallographic observations identify different fracture modes consistent with cycle dependent and time dependent regions. (auth)

• Research Organization: Westinghouse Electric Corp., Madison, PA
• NSA Number: NSA-33-026752
• OSTI ID: 4012095
• Country of Publication: United States
• Language: English

Related Subjects

*STAINLESS STEEL-316-- FATIGUE
360103* --Materials--Metals & Alloys--Mechanical Properties
CONTROL
CREEP
FRACTURES
HIGH TEMPERATURE
HZ RANGE
LMFBR TYPE REACTORS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
N77500 --Reactors--Power Reactors
Breeding
REACTOR COMPONENTS
SPOT WELDS
STRESSES
WELDED JOINTS