Abstract
The sheet formability of AISI Types 301, 304, and 305 stainless steels, ranked in order of increasing stability to strain‐induced martensite formation, was evaluated as a function of temperature between 15 and 60 °C. Forming limits spanning deep drawing, plane strain, and biaxial stretching strain states were determined by circle grid analysis of sheet specimens subjected to punch‐stretch testing at a constant punch displacement rate. Amounts of strain‐induced martensite were measured as a function of strain by magnetic measurement. Formability varied widely depending on test temperature and austenite stability, a result of temperature‐ and strain‐dependent formation of martensite that in some conditions was beneficial and in some conditions was detrimental to formability. These results are presented and discussed in detail.
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