PINE CONE LIKE FRACTURE SURFACE AND TEMPER EMBRITTLEMENT OF 5. 5%Ni STEELS.

Masato Murakami; Koji Shibata; Kotobu Nagai; Toshio Fujita

doi:10.2355/tetsutohagane1955.69.7_806

PINE CONE LIKE FRACTURE SURFACE AND TEMPER EMBRITTLEMENT OF 5. 5%Ni STEELS.

Masato Murakami, Koji Shibata, Kotobu Nagai, Toshio Fujita

Research output: Contribution to journal › Article › peer-review

Abstract

Pine cone fracture surfaces were observed in Charpy and compact tension specimens of cryogenic Ni steels containing retained austenite. These steels, especially those bearing no molybdenum, were embrittled on slow cooling from final tempering. ″Pine cone″ is a kind of intergranular fracture surface produced by fracture along P segregated alpha prime / gamma interfaces which formed at prior austenitic grain boundaries. Intercritical heat treatment promoted austenite formation and suppressed fracture.

Original language	English
Pages (from-to)	806-814
Number of pages	9
Journal	Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume	69
Issue number	7
DOIs	https://doi.org/10.2355/tetsutohagane1955.69.7_806
Publication status	Published - 1983
Externally published	Yes

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Metals and Alloys
Materials Chemistry

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abstract = "Pine cone fracture surfaces were observed in Charpy and compact tension specimens of cryogenic Ni steels containing retained austenite. These steels, especially those bearing no molybdenum, were embrittled on slow cooling from final tempering. ″Pine cone″ is a kind of intergranular fracture surface produced by fracture along P segregated alpha prime / gamma interfaces which formed at prior austenitic grain boundaries. Intercritical heat treatment promoted austenite formation and suppressed fracture.",

author = "Masato Murakami and Koji Shibata and Kotobu Nagai and Toshio Fujita",

year = "1983",

doi = "10.2355/tetsutohagane1955.69.7_806",

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AU - Murakami, Masato

AU - Shibata, Koji

AU - Nagai, Kotobu

AU - Fujita, Toshio

PY - 1983

Y1 - 1983

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AB - Pine cone fracture surfaces were observed in Charpy and compact tension specimens of cryogenic Ni steels containing retained austenite. These steels, especially those bearing no molybdenum, were embrittled on slow cooling from final tempering. ″Pine cone″ is a kind of intergranular fracture surface produced by fracture along P segregated alpha prime / gamma interfaces which formed at prior austenitic grain boundaries. Intercritical heat treatment promoted austenite formation and suppressed fracture.

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