J. Phys. IV France
Volume 05, Numéro C8, Décembre 1995
International Conference on Martensitic Transformations – ICOMAT 95
Page(s) C8-329 - C8-332
International Conference on Martensitic Transformations

J. Phys. IV France 05 (1995) C8-329-C8-332

DOI: 10.1051/jp4:1995847

Microstructure of Duplex Lamellar Phases in an Fe-37.3wt. %Ni-3.58wt. %Al-3.3wt. %Ti-0.2wt. % C Alloy

J.H. Kim and W.K. Choo

Korea Advanced Institute of Science and Technology, Dept. of Materials Science and Engineering, 373-1 Kusong-dong, Yusong-gu, Taejon, Korea

A mode of grain boundary precipitation in Fe-37.3wt%Ni-3.58wt.%Ti-02wt.%C alloy aged at 823K has been investigated by transmission electron microscopy. Fine γ' particles of L12-type ordering firstly precipitated within the γ matrix during ageing treatment at 823K. The aged matrix phases (γ and γ') were later encroached on by the grain boundary lamellar phases. Quite uniquely, these duplex fine lamellae are composed of alternately aligned ferrite and γ' platelets. These two phase constituents in the lamellae are separated by the interrace arallel to both {110}γ, and {111}γ' planes.

© EDP Sciences 1995