โ Scribed by L.E. Tanner
No coin nor oath required. For personal study only.
when it is aus~nitiz~ at high temperat~es in vacuum (or even at atmospheric pressure) it is not quite certain that after the high temperature soaking carried out by Ko and Edmondson, hydrogen was indeed retained by the austenite to an extent appreeiably greater than before cathodic impregnation, to enable its effect on austenite stability to be determined.
While, therefore, more experimental data on the effect of hydrogen on the stabilization of austenite would be undoubte~y interesting, it would appear that the deactivation of the strain embryos in austenite, resulting in its stabilization, is unlikely by hydrogen, at least in the amounts present in normally heat-treated steels.
Grateful thanks are due to Dr. B. R. Nijhawan, Director, National Metallurgical 'Laboratory, for discussion and permission to publish this note and to Mr. N. G. Banerjee, Junior Scientific Officer, for the hydrogen analyses.
๐ SIMILAR VOLUMES
than are actually observed. In addition the model requires that reflections of the type (OO..!} should remain sharp and reflections of the type (hk.0) should become broadened.
The temperature dependence of the yield stress in iron\* Erickson and Lo@' have recently suggested that the observed fattening of the yield-stress vs. temperature curve for iron at low temperatures may be due to the occmrence of tying rather than to the effect of s&mq&ere dew&y which is taken into