Plastic microstrain in silicon-iron

摘要: Abstract Specimens of fine and coarse grain 3 1 4 % silicon-iron were stressed in tension to various stresses below the upper yield point then examined by an etching technique sensitive dislocation sites. Slip was first observed at approximately 30 kg/mm2 independent size. This is approximate value friction stress single crystal for Stein Low.(1) As applied increased above kg/mm2, more individual grains yielded, somewhat macroscopic clusters yielded observed. The behavior this “pre-yield” plastic microstrain markedly dependent upon percentage versus measured 20 μ 170 sizes. These curves are consistent with theory that nucleates concentrations, e.g. precipitates, randomly distributed throughout volume. From these density active nucleation sites derived as a function stress.