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Characterisation of Short-range Order Using Dislocations by Florence Pettinari-Sturmel; Joël Douin; Armand Coujou; Nicole Clément is a Engineering article available to read on EtoBox.

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## Abstract The mobile dislocation pile-ups observed during in situ straining experiments have been used as probes to describe the short-range order (SRO) present in the γ phase of nickel-base superalloys. An experimental approach, based on the measurement of the dislocation positions, to characterise the SRO has been developed. This paper focuses on the main results we have obtained on this topic. A quantitative analysis allows to get the chemical forces associated with SRO, and also the SRO degree. For the first time, the energies associated with SRO are evaluated along a dislocation pile-up as a function of temperature. More generally, a description of the SRO is proposed: SRO is seen as a heterogeneous distribution at the micrometer scale of nanometric areas. Another characteristic has been evidenced: the reversible character of the SRO creation.

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Author

Florence Pettinari-Sturmel; Joël Douin; Armand Coujou; Nicole Clément

Publisher

Walter de Gruyter GmbH

Published

2006

Field

Engineering (Physical Sciences)