Effect of grit-blasting on the recrystallization behavior of DD6 single-crystal superalloy coated with NiCoCrAlYHf
Source abstract
Abstract
The effect of grit-blasting on the recrystallization configuration of a single-crystal nickel-based DD6 superalloy has been investigated. Both coated (with NiCoCrAlYHf bond coat) and uncoated alloys exhibit a double-layered recrystallized microstructure consisted of the consecutive equiaxed recrystallization (ERX) layer and the inconsecutive cellular recrystallization (CRX) structure. A chemical gradient of γ and γ’ phase promoting elements was observed in the interdiffusion zone, and the Cr profile was used to figure the average diffusion coefficient. With the increase of grit-blasting pressure, the overall recrystallization depth for both coated and uncoated alloys gradually increases at first, and then flattens out; the residual stress varies with the grit-blasting pressure in the same way.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · High Temperature Alloys and Creep · Nuclear Materials and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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