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Martensite and deformation twinning in austenitic steels

1999; Elsevier BV; Volume: 273-275; Linguagem: Inglês

10.1016/s0921-5093(99)00322-6

1873-4936

Violeta Tsakiris, D. V. Edmonds,

Metal Alloys Wear and Properties

The structural changes that occur in highly-alloyed austenitic steels during plastic deformation have been studied as a function of temperature and plastic strain. Stress-assisted and strain-induced martensites can occur, but also, deformation twinning can be identified by transmission electron microscopy. In the high-Mn austenite of Hadfield steel deformation is controlled by slip and twinning over a wide temperature range. In high-Ni and more complex alloyed austenites (such as in TRIP steels) deformation involving martensite formation, both stress-assisted and strain-induced, but near room temperature and above the influence of mechanical twinning, is also apparent.