| Numéro |
J. Phys. IV France
Volume 115, June 2004
|
|
|---|---|---|
| Page(s) | 243 - 250 | |
| DOI | https://doi.org/10.1051/jp4:2004115029 | |
J. Phys. IV France 115 (2004) 243
DOI: 10.1051/jp4:2004115029
The effect of aluminium on mechanical properties and deformation mechanisms of hadfield steel single crystals
E.G. Zakharova1, I.V. Kireeva1, Y.I. Chumlyakov1, A.A. Shul'mina1, H. Sehitoglu2 and I. Karaman31 Siberian Physical-Technical Institute, 634050 Tomsk, Novosobornaya Sq., 1, Russia
2 University of Illinois, 1206 West Green Street, Urbana, IL 61801, USA
3 Texas A&M University, College Station, TX 77843-3123, USA
Abstract
On single crystals of Hadfield steel
(Fe-13Mn-1.3C, Fe-13Mn-2.7Al-1.3C, wt.%) the systematical
investigations of deformation mechanisms - slip and twinning,
stages of plastic flow, strain hardening coefficient depending
on orientation of tensile axis have been carried out by methods
of optical and electron microscopy, x-ray analysis. Is has been
shown that the combination of low stacking fault energy
(
J/m
2) with high concentration of
carbon atoms in aluminium-free steel results in development of
the mechanical twinning at room temperature in all crystal
orientations. The new type of twinning with formation of
extrinsic stacking fault has been found out in [001] single
crystals. Experimentally it has been established that alloying
with aluminium leads to increase of stacking fault energy of
Hadfield steel and suppresses twinning in all orientations of
crystals at preservation of high values of strain-hardening
coefficients
.
© EDP Sciences 2004