Abstract
High entropy alloys (HEAs) have established an unprecedented stronghold in the domain of metallurgy in a relatively short span of time. The incoming era of engineering materials is expected to consist chiefly of these alloys, and therefore the research in this domain is ongoing extensively. Therefore, HEAs have been comprehensively discussed in the present work, covering from the fundamentals of entropy stabilization to the effect of microstructural modification on specific properties such as wear, creep and fatigue strength. The evolution of HEAs has been elucidated, along with the applications, characterization techniques for their identification and scrutiny. The methods for fabrication of HEAs such as arc melting, magnetron sputtering, laser cladding etc. are included inclusively. Importantly, the role of friction stir processing (FSP) in the advancement of HEAs has been elaborated. FSP induces further heterogeneity in the HEAs, which help to overcome the strength-ductility trade-off. The intricate effect of FSP on micro-structural modification and the consequent effect on mechanical properties has been studied through the light of literature available on such investigations.
Highlights
The conventional strengthening mechanisms such as grain boundary, solid solution, heat treatment and cold work etc. induce a proportional sacrifice on ductility which is undesirable
The results showed formation of two phases; one bodycentered cubic (BCC) solid solution phase and other the Laves phase of (CoCr)Nb type
Grain refinement, progressive recrystallization, hardness improvement, ductility reduction, and material strengthening are some of the advantages that can be associated with the friction stir processing (FSP) of High entropy alloys (HEAs) [78]
Summary
- On the real-time atomistic deformation of nano twinned CrCoFeNi high entropy alloy Shaohua Yan, Qing H Qin and Zheng Zhong. - Plastic deformation and strengthening mechanism of FCC/HCP nano-laminated dual-phase CoCrFeMnNi high entropy alloy Cheng Huang, Yin Yao, Xianghe Peng et al. - A novel dual phase high entropy casting alloy with high damping capacity Cheng Xu, Ningning Geng, Qingchun Xiang et al. This content was downloaded from IP address 154.13.228.172 on 01/03/2022 at 14:47
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