Thermo-mechanical factors influencing annealing twin development in nickel during recrystallization
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The effects of prior stored energy level, annealing temperature, heating velocity, and initial grain size on annealing twin development during static recrystallization of commercially pure nickel (99.999 %) are investigated. The twin content (measured as the twin boundary density or as the number of twins per grain) at the end of recrystallization is shown to be primarily influenced by the prior stored energy level and by the initial grain size, but the effects of heating rate and the annealing temperature are negligible. Taken together, the results are consistent with a new proposition that roughness of the recrystallization front promotes the formation of annealing twins during recrystallization.
KeywordsTwin Boundary Boundary Migration Annealing Twin Twin Density Grain Boundary Engineering
This work was funded by the French National Research Agency (ANR project called FORMATING: ANR-11-NS09-001-01) and the Materials World Network of the US National Science Foundation under grant number DMR-1107986.