Initial Studies of In-Sem Fracture Using a Tensile Stage.

摘要

Using a uniquely designed base, tensile tests were performed on A-36 and HY-130 steel plate specimens and a defective AX-110 weld deposit under vacuum inside a scanning electron microscope. Although the base is also designed to handle compression and bending tests, this initial investigation was confined to tensile loading. Results to date show that considerable plastic deformation occurs within the grains of the A-36 and HY-130 specimens prior to failure. Stringers of inclusions were found to serve as principal sites for crack initiation and void formation. The tensile stage was found to be successful in monitoring crack growth in specimens. (Author)