✍ Scribed by A.W Sleeswyk; J.N Helle
No coin nor oath required. For personal study only.
A description is given of zigxag configurations of twin b8nds in a-iron, obtained after 8 few per cent strain in tension or compression at the temperature of liquid 0,. It is shown thet these configurations can be adequately explained by considerations on the geometrical and mechanical compatibility of the twelve possible {21 l} (111) twin systems. The mechanical criteria for the formation of the zigzags are found to be different in tension 8nd in compression. LES CONFIGURATIONS ZIGZAG DES MACLES DANS LE FER a Les auteurs donnent une description des configurations zigrag des bandes de nmcles dtlns le fer a ap& quelques pour-cent de deformation en tension ou en compression 818 temperature de l'oxygene liquide. 11s montrent que des configurations peuvent btre expliqu6es de f8$on adequate par des considerations de competibilite geometrique et mecanique des douse systemes {2 11) ( 111) demaol8ge possibles. 11s trouvent que les criteres meaaniques de formation des zigzag sont differents en tension et en compression. ZICKZACK-ANORDNUNGEN VON ZWILLINGEN IN a-EISEN Zicksack-Anordnungen von Zwillingsbiindern in a-Eisen die neoh einigen Prozent Zug-oder Kompressionsverformung bei der Temperatur des fliissigen 0, auftreten, werden besohrieben. Es wird gezeigt, dsg diese Anordmmgen durch Betrechtungen der geometrischen und mechanischen Kompatibihtet der zwiilf meglichen (211) (11 I)-Zwillingssysteme gut erkl&rt werden konnen. Die mechanischen Kriterien fur die Bildung der Zickzllck-Anordmmgen sind fiir Zug-und Kompressionsverformung verschieden.
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