Systematic research on the formation of heterogenous microstructure in FeCoNiCrMn high entropy cold spray
Citation:
Pengfei Yu, Ningsong Fan, Shuo Yin, Rocco Lupoi, Systematic research on the formation of heterogenous microstructure in FeCoNiCrMn high entropy cold spray, International Thermal Spray Conference (ITSC), Vienna, 4-6 May 2022, 2022Download Item:
Abstract:
High entropy alloys, as a novel alloy system, demonstrated excellent mechanical performance. However,
despite its excellent mechanical performance, the strength-ductility trade-off effect still limit its performance.
In recent decades, it has been found that heterogenous or gradient microstructure can efficiently solve the
conflict. Cold spray is a promising method to create heterogenous microstructure with high efficiency and
low cost. In this work, equiatomic FeCoNiCrMn HEA was deposited by cold spray and the microstructure
was systematically investigated by transmission electron microscopy (TEM) and transmission Kikuchi
diffraction (TKD). In cold spray, a gradient microstructure was formed and segregated Ni and Mn in starting
particle were also redistributed. Moreover, twinning in ultra-fine nanograins were detected in the region
close to the impact interface. Compared with severe deformation of other low SFE metals, for FeCoNiCrMn
HEA, twinning in nanograins also highly related to the grain size.
Author's Homepage:
http://people.tcd.ie/lupoir
Author: Lupoi, Rocco
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International Thermal Spray Conference (ITSC)Type of material:
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Cold spray, Alloy, High entropy alloysMetadata
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