Structure and mechanical properties of austenitic steel with low-temperature deformation under linear and plane-stress conditions

Effect of Drawing Strain on Development of Martensitic Transformation and Mechanical Properties in AISI 304L Stainless Steel Wire

“…In Figure b, the variation of principle stress ratios, which claimed to be effective on the martensitic transformation is presented . This ratio shows the maximum amount just at the midpoint of wire radius, which was not in accordance with mentioned other indexes.…”

“…This ratio shows the maximum amount just at the midpoint of wire radius, which was not in accordance with mentioned other indexes. In some reports mentioned that the Lode parameter can be used as DIM formation index . Variation of this index is shown in the Figure c.…”

“…These results show that loading condition varies in the radial direction, and this loading variation can influence on the martensitic transformation. Various indexes were suggested for evaluating the effects of loading condition . Shear strain has the major role in transformation from austenite to martensite .…”

“…Shear plastic strain varied and showed maximum shear strain at 0.13 mm bellow the wire surface. Another suggested index for distinguishing formation condition of DIM is the maximum to minimum strain ratio, which showed maximum amount at 0.13 mm bellow the wire surface, as illustrated in Figure c . The variation of micro hardness along the radius of two drawn wires to strain of 0.56 and 1.13 were examined for studying the compatibility of mentioned indexes with reality (Figure d).…”

“…Applied stress can mobilize different variant of martensitic transformation systems by shearing. Hydrostatic pressure plays retarding effect on the martensitic transformation, and it can be used as another DIM formation index . In Figure a, the variation of hydrostatic pressure along the radius direction mention in the Figure a is shown.…”