High Nitrogen Austenitic Stainless Steel Precipitation During Isothermal Annealing

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Maria Domankova ; Katarína Bártová ; Ivan Slatkovský ; Peter Pinke (2016)
  • Publisher: Univerzity of Zilina. Faculty of Mechanical Engineering
  • Journal: Materiálové Inžinierstvo (issn: 1335-0803, eissn: 1338-6174)
  • Subject: TA401-492 | Materials of engineering and construction. Mechanics of materials | Stainless Steel | Annealing | Sensitization.
    mesheuropmc: technology, industry, and agriculture

The time-temperature-precipitation in high-nitrogen austenitic stainless steel was investigated using light optical microscopy, transmission electron microscopy, selected area diffraction and energy-dispersive X-ray spectroscopy. The isothermal precipitation kinetics curves and the corresponding precipitation activation energy were obtained. The diffusion activation energy of M2N precipitation is 129 kJ/mol. The results show that critical temperature for M2N precipitation is about 825°C with the corresponding incubation period 2.5 min.
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