Yield points in aluminium alloy single crystals
β Scribed by R.E Smallman; G.K Williamson; G Ardley
- Publisher
- Elsevier Science
- Year
- 1953
- Weight
- 500 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0001-6160
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β¦ Synopsis
and G. ARDLEYS
Experiments have been made to compare the tensile behaviour of some aluminium alloy single crystals which contained copper, zinc, or hydrogen, with that of superpure aluminium crystals. Sharp yield points were observed in all the alloys when tested at liquid air temperature, but the superpure crystals showed no capacity for producing a yield point. These results are discussed from the standpoint of the dislocation theory of the yield point. LES LIMITES D'ECOULEMENT DANS DES MONOCRISTAUX D'ALLLAGES D'ALUMINIUM Des essais ont et6 faits en vue de comparer le comportement lors de la traction, de monocristaux d'alliages d'aluminium contenant du cuivre et du zinc ou de l'hydrogene, avec des cristaux d'aluminium tres pur. Des limites d'ecoulement bien prononcees furent observees dans tous les alliages essay& B la temoerature de l'air liauide. alors aue les cristaux d'aluminium t&s nur n'ont montre aucune tendance' b la formation d'une limite d'kcoulement. Ces resultats sont dis'cutes en prenant comme base la theorie des dislocations de la limite d'ecoulement. ELASTIZITATSGRENZE IN EINKRISTALLEN VON ALUMINIUMLEGIERUNGEN Experimente wurden unternommen urn das Verhalten unter Zug von Einkristallen von Aluminiumlegierungen, die Kupfer, Zink oder Wasserstoff enthalten, mit Reinstaluminiumeinkristallen zu vergleichen. Alle Legierungen zeigten bei der Temperatur der fltissigen Luft scharfe Elastizitatsgrenzen, wahrend das Reinstaluminium keine Fahigkeit zur Herausbildung einer deutlichen Elastizitatsgrenze zeigte. Diese Ergebnisse werden vom Standpunkt der Versetzungstheorie der Elastizitatsgrenze diskutiert.
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