Development of Grain Boundary Character Distribution in Medium-Strained 316L Stainless Steel During Annealing

作者：Huang, Weijiu^*; Yuan, Shanshan; Chai, Linjiang^*; Jiang, Luyao; Liu, Haiding; Wang, Fangjun; Wang, Dongzhe; Wang, Junjun

来源：Metals and Materials International, 2019, 25(2): 364-371.

DOI：10.1007/s12540-018-0203-7

• 316L stainless steel
• Microstructure
• Grain boundary character distribution
• Annealing twin
• Electron backscatter diffraction
• Hardness

A medium-strained (13% cold-drawing) 316L austenitic stainless steel rod was subjected to annealing between 750 and 1100 degrees C. Electron backscatter diffraction and electron channeling contrast imaging techniques were jointly employed to investigate the development of microstructures and grain boundary character distribution during the annealing treatments. Results show that annealing at temperatures below 900 degrees C does not evidently change microstructures of the as-drawn specimen. Full recrystallization is observed after the temperature reaches 1000 degrees C and the deformation microstructures are replaced by fine and uniform recrystallized grains. A large number of annealing twins (with sigma 3 misorientation) are produced by the recrystallization, leading to markedly increased fractions of special boundaries (f(SB)). The maximum f(SB) is found to be 67.3% in the present study. In addition, for the recrystallized grains, rapid growth is noticed at relatively high temperatures due to easy migration of grain boundaries.

• 出版日期2019-3
• 单位重庆理工大学