Investigations of Low Temperature Time Dependent Cracking

Van der Sluys, W A ; Robitz, E S ; Young, B A ; Bloom, J

McDermott Technology, Inc., Alliance, Ohio (United States)

关键词: Boilers;    Carbon Steels;    Testing;    Forecasting;    36 Materials Science;   

DOI  :  10.2172/833790
RP-ID  :  DOE/ER/14809-1 Final Report
RP-ID  :  FG02-97ER14809
RP-ID  :  833790

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this project was to investigate metallurgical and mechanical phenomena associated with time dependent cracking of cold bent carbon steel piping at temperatures between 327 C and 360 C. Boiler piping failures have demonstrated that understanding the fundamental metallurgical and mechanical parameters controlling these failures is insufficient to eliminate it from the field. The results of the project consisted of the development of a testing methodology to reproduce low temperature time dependent cracking in laboratory specimens. This methodology was used to evaluate the cracking resistance of candidate heats in order to identify the factors that enhance cracking sensitivity. The resultant data was integrated into current available life prediction tools.