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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
2
ISBN electronic:
978-1-62708-215-0
Publication date:
1993
Book Chapter

Caustic-Induced Stress-Corrosion Cracking of a Flue Gas Expansion Joint

By
Sarah Jane Hahn
Sarah Jane Hahn
Radian Corporation
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Published:
1993
Page range:
153 - 155

Abstract

A type 430Ti stainless steel flue gas expansion joint cracked because of caustic-induced stress-corrosion cracking. Energy-dispersive X-ray spectroscope analysis of the fracture surface deposits revealed the presence of sodium and potassium—caustics in hydroxide form. Primary fracture surfaces were all similar in appearance, and a primary crack origin could not be identified. A secondary crack brought to fracture in the laboratory showed brittle, cleavage features rather than classic, tensile overload features. This suggested that the material was embrittled.

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Sarah Jane Hahn, 1993. "Caustic-Induced Stress-Corrosion Cracking of a Flue Gas Expansion Joint", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

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