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Proceedings Paper

Method for NDE of thermal embrittlement of duplex stainless steels
Author(s): Toru Goto; Takesi Naito; Shintaro Kumano
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Paper Abstract

To verify and maintain the integrity of duplex stainless steels currently in service, we conducted a study in order to develop a method to nondestructively estimate their Charpy-impact energy at room temperature. Hardness of the ferrite phase was found to be a reliable indicator of the process of embrittlement during long-term heating for duplex stainless steels, but further information on the ferrite phase and the austenite phase is required for the estimation of Charpy-impact energy. An equation involving the hardness values of the ferrite and austenite phases,the ferrite content, and the average spacing of ferrite phase islands was found to be applicable in the nondestructive estimation of Charpy-impact energy at room temperature.

Paper Details

Date Published: 14 November 1996
PDF: 8 pages
Proc. SPIE 2947, Nondestructive Evaluation of Utilities and Pipelines, (14 November 1996); doi: 10.1117/12.259166
Show Author Affiliations
Toru Goto, Mitsubishi Heavy Industries, Ltd. (Japan)
Takesi Naito, Mitsubishi Heavy Industries, Ltd. (Japan)
Shintaro Kumano, Mitsubishi Heavy Industries, Ltd. (Japan)

Published in SPIE Proceedings Vol. 2947:
Nondestructive Evaluation of Utilities and Pipelines
Martin Prager; Richard M. Tilley, Editor(s)

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