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He, Qubo,Pan, Fusheng,Wang, Dongzhe,Liu, Haiding,Guo, Fei,Wang, Zhongwei,Ma, Yanlong Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.1
The microstructure and texture of three 316L foils of 25 ㎛ thickness, which were subjected to different manufacturing process, were systematically characterized using advance analytical techniques. Then, the electrochemical property of the 316L foils in simulated pressurized water reactor (PWR) solution was analyzed using potentiodynamic polarization. The results showed that final rolling strain and annealing temperature had evident effect on grain size, fraction of recrystallization, grain boundary type and texture distribution. It was suggested that large final rolling strain could transfer Brass texture to Copper texture; low annealing temperature could limit the formation of preferable orientations in the rolling process to reduce anisotropy. Potentiodynamic polarization test showed that all samples exhibited good corrosion performance in the simulated primary PWR solution.
Weijiu Huang,Shanshan Yuan,Linjiang Chai,Luyao Jiang,Haiding Liu,Fangjun Wang,Dongzhe Wang,Junjun Wang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.2
A medium-strained (13% cold-drawing) 316L austenitic stainless steel rod was subjected to annealing between 750 and1100 °C. Electron backscatter diffraction and electron channeling contrast imaging techniques were jointly employed toinvestigate the development of microstructures and grain boundary character distribution during the annealing treatments. Results show that annealing at temperatures below 900 °C does not evidently change microstructures of the as-drawn specimen. Full recrystallization is observed after the temperature reaches 1000 °C and the deformation microstructures are replacedby fine and uniform recrystallized grains. A large number of annealing twins (with Σ3 misorientation) are produced by therecrystallization, leading to markedly increased fractions of special boundaries (fSB). The maximum fSB 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 toeasy migration of grain boundaries.