Hydraulic-Type Tensile Device for Transmission Electron Microscopy

A tensile device which is driven by hydrostatic pressure was newly developed for “in-microscope” experiment of crystal deformation. This device can be set on a conventional goniometer stage of electron microscope and is capable of measuring both the stress and strain applied to the specimen under electron microscope observation. The exceedingly smooth action of this device in stretching the specimen permits of continuous record of the electron microscope images of moving dislocations with the aid of an image intensifier and video tape recorder. The load-elongation curve can be recorded simultaneously. Suspension of strain at any instant and preservation of a constant strain rate as well as the change of strain rate can be made in the course of the tensile test with a new drive system adopted to this device.