The proceedings of the JSME annual meeting
Online ISSN : 2433-1325
2003.1
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Thermal Fatigue Behavior of Boiler Tube Steel
Shingo AOIRyuichiro EBARATakashi NISHIMURAHiroyuki TOKUNAGA
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CONFERENCE PROCEEDINGS FREE ACCESS

Pages 155-156

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Abstract
Thermal fatigue crack initiation and propagation tests for boiler steel SB410 were conducted up to 100 cycles at 573,673,773 and 873K by use of a laboratory made thermal fatigue testing apparatus. The higher the heating temperature, the lower the number of cycles for crack initiation was. The higher the heating temperature, the faster the crack propagation rate was. The thermal fatigue crack was observed by optical microscopy. Plural cracks were observed at 873K, and the crack tip was branched. While, the crack length at 573K was very short. The higher the heating temperature, the longer the crack was.
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© 2003 The Japan Society of Mechanical Engineers
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