Some observations are presented of the plastic flow of zinc at very small stresses, just beyond the elastic limit

Tyndall, E. P. T.

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Plasticity of Zinc Single Crystals

University of Northern Iowa

Proceedings of the Iowa Academy of Science Volume 49 Annual Issue Article 73 1942 Plasticity of Zinc Single Crystals E. P. T. Tyndall Copyright ©1942 Iowa Academy of Science, Inc. Follow this and additional works at: https://scholarworks.uni.edu/pias Recommended Citation Tyndall, E. P. T. (1942) "Plasticity of Zinc Single Crystals," Proceedings of the Iowa Academy of Science, 49(1), 382-382. Available at: https://scholarworks.uni.edu/pias/vol49/iss1/73 This Research is brought to you for free and open access by the Iowa Academy of Science at UNI ScholarWorks. It has been accepted for inclusion in Proceedings of the Iowa Academy of Science by an authorized editor of UNI ScholarWorks. For more information, please contact scholarworks@uni.edu. :382 IOWA AC\DE}1Y OF SCIENCE [Yul. 4!J ANODE EFFECT IN A COMMERCIAL RADIO TUBE A. OwENs The anode effect has been studied on the grid and found to he in agreement with results previously published. Attention was then shifted to the plate where the anode effect was studied at larger current densities. It is to be noted that the building up of the effect can more easily be observed on the plate and the decav more easily observed on the grid. SOME EFFECTS ASSOCIATED WITH NEGATIVE CORONA ONSET L. E. PINNEY Using concentric cylinder electrodes, observations were made on negative corona in hydrogen, argon, and nitrogen at pressures be-tween 1 and 10 cm. of mercury. Positive ions produced by X-rays passing through argon in the corona chamber produced no measurable secondary effects at potentials below onset. Currents maintained by photo emission from the cathode became unstable at a potential near but definitely below onset. IowA STATE CoLLEcrn, AMES, IowA THERMAL EXPANSION OF SINGLE CRYSTALS OF ZINC \VIJ,LIAM P. STAKER The thermal expansions of sixteen zinc single crystals have been measured in the temperature range 20°-100° C. The expan-sion coefficient is constant and obeys the Voigt symmetry relation. PLASTICITY OF ZINC SINGLE ORYST ALS E. P. T. TYNDALL Some observations are presented of the plastic flow of zinc at very small stresses, just beyond the elastic limit. 1Tyndall: Plasticity of Zinc Single CrystalsPublished by UNI ScholarWorks, 1942

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Plasticity of Zinc Single Crystals

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University of Northern Iowa