From measurements of Luder's band-front velocities it is concluded that hydrogen does not affect the activation energy for separating a dislocation and its atmosphere and thereby the delay-time for yielding. Suppression of the upper yield point by hydrogen seems rather to be caused by local stresses
The dynamic yielding of mild steel
โ Scribed by J.D Campbell
- Publisher
- Elsevier Science
- Year
- 1953
- Weight
- 494 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0001-6160
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โฆ Synopsis
Results of dynamic and impact tests on mild steel are reviewed, and a criterion for dynamic yield is proposed, based on Cottrell and Bilby's theory of yielding. The criterion is applied to some of the published experimental data and a comparison is made with theory. The need for further experimental work is emphasized. L'ECOULEMENT DYNAMIQUE DANS L'ACIER DOUX Une revue est faite des resultats d'essais dynamiques et au choc effect&s sur l'acier doux, et un criterium, base sur la theorie d'ecoulement de Cottrell et Bilby, est propose pour l'ecoulement dynamique. Ce criterium est applique a certaines des don&es experimentales publiees; une comparaison est faite avec la theorie. La necessite de continuer les travaux experimentaux est soulignee. DYNAMISCHES FLIESSEN IN WEICHEM STAHL Die Ergebnisse von dynamischen Versuchen und von Schlagversuchen werden kritisch zusammengestellt, und ein Kriterion fiir dynamisches Fliessen wird vorgeschlagen, dem die Theorie des Fliessens von Cottrell und Bilby zu Grunde liegt. Dieses Kriterion wird auf einige experimentelle Daten in der Literatur angewandt, und die Ergebnisse werden mit der Theorie verglichen: Es wird betont, dass weiteres experimentelles Material dringend benijtigt wird.
๐ SIMILAR VOLUMES
T, is the temperature at which the surface tension is measured. The density p must also be corrected, using the bulk coeilicient of expansion. Using a factor o = 9 and without making any temperature corrections, relatively good predictions are made for the surface tension of many metals. Table 1