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The Effect Of Surface-Active Agents On The Mechanical Properties Metals Part I. The Effect of Surface-Removal on the Plastic Behavior of Aluminum Single Crystals

Report Number: WADD TR 61-58 Part I
Author: Kramer, I. R.
Corporate Author: The Martin Company
Laboratory: Materials Central
Date of Publication: 1961-04
Pages: 36
Contract: AF 33(616)-6220
Project: 7023
Task: 73667
PB Number: PB181112
AD Number: AD0281935

Aluminum single crystals were pulled in an electrolytic cell and the surface of the crystal was removed during the deformation. The extent of Stages I and II (of the deformation process) was increased and their slopes decreased as the rate of metal removed from the surface was increased. Increasing the strain rate caused a decrease in the extent of Stages I and II and increased the slopes. The experimental data indicate that the work-hardening coefficient of Stage I is determined primarily by the conditions which exist on the surface of the crystal. In Stages II and III, both surface effects and internal barriers are important.

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