J. Phys. Colloques
Volume 51, Numéro C1, Janvier 1990Proceeding of the International Congress
Intergranular and Interphase Boundaries in materials
|Page(s)||C1-435 - C1-438|
MECHANISMS OF THE FORMATION OF HIGH ANGLE GRAIN BOUNDARIES DURING THE HOT DEFORMATION OF STAINLESS STEELSA. BELYAKOV, R. ZARIPOVA, R. KAIBYSHEV et G. SALISHCHEV
Institute of Metals Superplasticity Problems, URSS Academy of Sciences, Ufa 450001, U.R.S.S.
The paper deals with the formation of grain boundaries during hot deformation of austenitic, ferritic and austenitic-ferritic steels. It is shown that in all materials under investigation the formation of high angle boundaries occurs after considerable straining. At the earlier stages of plastic flow structural changes are defined by material and strain temperature. At low temperatures in austenitic steel and in the austenitic phase of a two-phase material the formation of fragmented structure occurs. Developed substructure is formed in ferrite in all the temperature-strain rate interval under study, while in austenite only at considerably high temperatures. Mechanisms of structure formation in plastic flow in stainless steels are discussed.