Abstract
AbstractThis paper briefly describes the apparatus and experimental procedure for the modified miniature specimen test (MMST). The primary focus is on the thought and methodology of converting data. The accuracy and reliability of test results are emphasized. The fundamental relations for converting experimental data are established via analysis of elastic-plastic bulge deformation behavior of a middle-thick circular plate loaded at the center for which the circumference is fixed and points at the boundary can move in a radial direction. The formulas for calculating materials strength and ductility have been derived from the relation. Three types of unirradiated materials whose strengths are different and one kind of 316 SS irradiated by protons were tested with MMST. The test results along with the standard deviations are presented. The comparison of these data with that for uniaxial tension tests is also given. The evaluation of material equivalent fracture strain was also performed with the MMST.
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