FORMATION OF A FINE-GRAINED STRUCTURE
OF IRON-NICKEL ALLOYS BY REVERSIBLE
MARTENSITE TRANSFORMATION

V. E. Danil'chenko

UDC 669.15

We have investigated the influence of multiple  
--  transformations proceeding by 
the shear mechanism on the structural-phase state of austenite in 
iron-nickel alloys N28T2Yu2 and N32. It has been shown that it is 
possible to form, by cyclic --  transformations, a fine-grained structure of austenite due 
to the fragmentation of the initial structure that develops under 
the conditions of progressing disorientation of the crystal lattice 
of the -phase. In the process of thermocycling, 
the reversed austenite was continuously strengthened under the condition 
of the development of disorientation of its lattice.

G. V. Kurdyumov Institute of Physics of Metals, National Academy of Sciences 
of Ukraine, 36 acad. Vernadskii Ave., Kiev, 03680, Ukraine; email: danila@imp.kiev.ua. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 3, pp. 602-606, 
May-June, 2008. Original article submitted September 29, 2006.