Comments on Selective evolution of secondary precipitation in a Ni-based single crystal superalloy both in the matrix and at the dislocation nodes
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2016 Elsevier Ltd. In a recent paper, Sisi Xiang & al. [Acta Materialia 116 (2016) 343] studied microstructure evolutions of precipitates during creep of a Ni-based single crystal superalloy, with a special focus on hyperfine particles nucleating in the matrix channels. This paper is misleading, claiming that hyperfine particles nucleate during high temperature creep exposure at 1100C. The aim of the present comments is to reconsider these results based on the available literature on hyperfine particles nucleation mechanisms and subsequent morphological evolutions at high temperature.
author list (cited authors)
Cormier, J., Caccuri, V., le Graverend, J., & Villechaise, P.