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ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
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ASM International
Volume
1
ISBN electronic:
978-1-62708-214-3
Publication date:
1992
Book Chapter

Fracture of Steam Pipes Removed From Service[1]

By
P.K. Liaw
P.K. Liaw
Westinghouse Science and Technology Center
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;
A. Saxena
A. Saxena
Georgia Institute of Technology
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;
J. Schaefer
J. Schaefer
Detroit Edison Company
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Published:
1992
Page range:
437 - 439

Abstract

Creep crack growth and fracture toughness tests were performed using test material machined from a seam welded ASTM A-155-66 class 1 (2.25Cr-1Mo) steel steam pipe that had been in service for 15 years. The fracture morphology was examined using SEM fractography. Dimpled fracture was found to be characteristic of fracture toughness specimens. Creep crack growth generally followed the fusion line region and was characterized as dimpled fracture mixed with cavities. These fracture morphologies were similar to those of an actual steam pipe. It was concluded that creep crack growth behavior was the prime failure mechanism of seam-welded steam pipes.

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P.K. Liaw, A. Saxena, J. Schaefer, 1992. "Fracture of Steam Pipes Removed From Service", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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