Investigations of Low Temperature Time Dependent Cracking. Final Report.

Bloom, J. ; Robitz, E. S. ; Young, B. A. ; VanDerSluys, W. A.

Technical Information Center Oak Ridge Tennessee

关键词: Boilers;    Carbon steels;    Cracking(Fracturing);    Metallurgy;    Piping systems;   

RP-ID  :  DE2005833790

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports 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.