Skip to Main Content
ASM Failure Analysis Case Histories

Handbook of Case Histories in Failure Analysis

Edited by
Khlefa A. Esaklul
Khlefa A. Esaklul
Search for other works by this author on:
ASM International
ISBN electronic:
Publication date:
Book Chapter

Failure of a Boiler Feed Pump Second-Stage Impeller

Joyce M. Hare
Joyce M. Hare
Gelles Laboratories, Inc.
Search for other works by this author on:
Page range:
266 - 272


Failure analysis was performed on a fractured impeller from a boiler feed pump of a fossil fuel power plant. The impeller was a 12% Cr martensitic stainless steel casting. The failure occurred near the outside diameter of the shroud in the vicinity of a section change at the shroud/vane junction. Sections cut from the impeller were examined visually and by SEM fractography. Microstructural, chemical, and surface analyses and surface hardness tests were conducted on the impeller segments. The results indicated that the impeller failed in fatigue with casting defects increasing stress and initiating fracture. In addition, the composition and hardness of the impeller did not meet specifications. Revision of the casting process and institution of quality assurance methods were recommended.

You do not currently have access to this content.
Don't already have an account? Register

Joyce M. Hare, 1992. "Failure of a Boiler Feed Pump Second-Stage Impeller", Handbook of Case Histories in Failure Analysis, Khlefa A. Esaklul

Download citation file:

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal