Reversible, high temperature softening of plasma-nitrided hot-working steel studied using in situ micro-pillar compression

Best, James P.; Wehrs, Juri; Maeder, Xavier; Zechner, Johannes; Wheeler, Jeffrey M.; Schär, Tobias; Morstein, Marcus; Michler, Johann

Materials Science and Engineering A 680 (2017)

The high temperature mechanical behaviour of plasma-nitrided tool steel is investigated at variable temperatures using in situ micro-pillar compression. It is observed that the strengthening brought about by nitriding is steadily, but reversibly, reduced when increasing the testing temperature, until it is completely negated at 500 °C.