Mapping of 475 °C embrittlement in ferritic Fe–Cr–Al alloys

Mapping of 475 °C embrittlement in ferritic Fe–Cr–Al alloys

Embrittlement at 475 °C was mapped in ferritic ternary alloys with a wide composition range of Fe–(10–30)Cr–(0–20)Al (at.%) using a diffusion multiple technique. A large solid solution of Al suppresses the 475 °C embrittlement, while a small solid solution of Al promotes embrittlement. Transmission...

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Bibliographic Details
Published in:Scripta materialia Vol. 63; no. 11; pp. 1104 - 1107
Main Authors: Kobayashi, Satoru, Takasugi, Takayuki
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-11-2010
Subjects:
Aging
Embrittlement
Hardness test
Stainless steels
Aging
Hardness test
Stainless steels
Embrittlement
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Summary:Embrittlement at 475 °C was mapped in ferritic ternary alloys with a wide composition range of Fe–(10–30)Cr–(0–20)Al (at.%) using a diffusion multiple technique. A large solid solution of Al suppresses the 475 °C embrittlement, while a small solid solution of Al promotes embrittlement. Transmission electron microscopy observations on aged samples suggest that suppression of the embrittlement due to Al addition can be attributed to the suppression of phase separation of the ferrite phase into the two phases Fe-rich ferrite and Cr-rich ferrite.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.08.015