To obtain fine grained Cu based shape memory alloys after thermomechanical processing, Ti is added to β-Cu–Zn–Al or β-Cu–Al–Ni as a particle forming element. This work consists of a study of the mechanism that controls the grain growth limiting effect during the final annealing treatment. A critical evaluation of the grain growth models in particle containing materials and comparison with the experimental results lead to the conclusion that the grain growth inhibition is mainly attributable to the effect of the second phase particles but also to the influence of Ti atoms in solid solution.
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