Effect of Ni on the mechanical behavior of a high-Mn austenitic TWIP steel

  • Yuksel Akinay, Fatih Hayat
  • Materials Testing, May 2016, Carl Hanser Verlag
  • DOI: 10.3139/120.110879

Effect of Ni on the mechanical behavior of a high-Mn austenitic TWIP steel

What is it about?

The effect of Ni on the mechanical properties and microstructure of twinning induced plasticity (TWIP) steels were investigated in this study. TWIP 1 (0.6 C, 24 Mn) and TWIP 2 (0.6 C, 24 Mn, 1 Ni) steels were fabricated and annealed at 700, 800 and 900 °C for 150 minutes and then air-cooled. The results revealed that the Ni containing steel (TWIP 2) exhibits a higher yield strength and tensile strength than the steel TWIP 1. Carbide precipitations have been detected in the microstructure of TWIP 1 and TWIP 2 specimens annealed at 700 °C. However, the microstructure of the steel TWIP 1 annealed at 800 and 900 °C was fully austenitic and some grains included twins. It turned out that with the addition of Ni, the formation of twinning decreased in consequence of the annealing at 800 and 900 °C.

Perspectives

Dr Yuksel AKINAY
Karabuk Universitesi

In the literature, several studies are available regarding the TWIP steel production process. However, there are no studies available that report about the influence of the nickel element on the mechanical and microstructure properties of TWIP steel. However, slip bands and twinning were compared and investigated in this study. In this direction, the aim of this work is to examine the influence of Ni element on mechanical properties of TWIP steel. However, the effects of annealing temperature and annealing time on the mechanical properties and microstructural evolutions of TWIP steel were also investigated.

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http://dx.doi.org/10.3139/120.110879

The following have contributed to this page: Dr Yuksel AKINAY