Behavior of Reverted Austenite in Fe-Ni-Mn-(Ti) Maraging Steels

Kim, Sung-Joon; 김성준

오늘 하루 그만보기

P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

e-Submission

Vol.6, No.1

PubReader Citation

Behavior of Reverted Austenite in Fe-Ni-Mn-(Ti) Maraging Steels

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1993, v.6 no.1, pp.141-147

Kim, Sung-Joon

Kim, S. (1993). Behavior of Reverted Austenite in Fe-Ni-Mn-(Ti) Maraging Steels. , 6(1), 141-147.

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Abstract

The behavior of reverted austenite in Fe-Ni-Mn(Ti) maraging steels has been investigated in the temperature range from $400^{\circ}C$ to $550^{\circ}C$ using TEM equipped with EDX. Four kinds of reverted austenite appeared depending on the aging temperatures and time : Widmanstatten, granular, lath-like and recrystallized austenite. The reverted austenites are enriched in Ni and Mn due to the dissolution of precipitates and redistribution of alloying elements. Widmanstatten austenite appears unformly in the lath martensite having the K-S orientation relationship with the martensite lath, while lath-like martensites showed K-S and N relations depending on the chemistry and heat treating condition. The recrystallized austenite forms at $550^{\circ}C$ after long aging times : some becomes unstable and transforms to lath martensite on cooling.