Measurement of the Stress and Strain on Specimens in an Electron Microscope

Abstract
A tensile device is developed which enables one to determine the stress-strain relationship of a specimen being extended during electron microscopic observation. The minimum detectable increment of load is about 0.01 g and the minimum detectable elongation is about 0.1%. Yield points of foils of Al and other metals are observable by 500 kV electron microscopy along the stress-strain curves.