کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1578722 | 1514820 | 2011 | 13 صفحه PDF | دانلود رایگان |

The microstructure and texture evolution of 42% cold-rolled Fe–24Mn–3Al–2Si–1Ni–0.06C TWinning Induced Plasticity (TWIP) steel is investigated during isochronal annealing at temperatures between 600 and 850 °C. In the cold rolled condition, bulk texture returned the distinctive α-fibre for low stacking fault energy materials, with higher intensities for Goss ({1 1 2}〈 0 1 1 〉) compared to Brass ({1 1 1}〈 1 1 2 〉). A comparison between bulk and micro-textures, showed a significant slip contribution to the development of the Brass orientation, along with a possible role for micro-shear banding. Annealing twins contribute to recrystallisation from the early stages of nucleation and participate in generating new orientations thereafter. Unlike texture studies on other austenitic steels, the F ({1 1 1}〈 0 1 1 〉) and Rotated Copper ({1 1 2}〈 0 1 1 〉) orientations were detected in this work. The former is due to a more homogeneous distribution of nucleation sites, while the latter can be ascribed to second order twinning and the preferred-growth 30° 〈1 1 1〉 relation with the Brass rolling component. Based on the microstructural parameters from Electron Back-Scattering Diffraction (EBSD), the modified Hall–Petch (H–P) relation was successfully applied to the 0.2% proof stress.
► Slip and micro-shear banding contribute to the development of Brass orientation.
► Annealing twins evolve since the early nucleation stage.
► F orientation forms upon recrystallisation due to relatively random nucleation.
► Second order twinning and favoured growth relation lead to Rotated Copper component.
► The modified Hall–Petch equation adequately predicts the 0.2% proof stress.
Journal: Materials Science and Engineering: A - Volume 528, Issues 13–14, 25 May 2011, Pages 4537–4549