Abstract
Martensitically formed duplex fcc + hcp Co-based entropic alloys have been investigated both experimentally and theoretically. Theoretical predictions are in good agreement with experimental observations. A fair correlation is found between calculated driving forces for a partitionless fcc→hcp transformation and experimentally obtained phase fractions.
Highlights
IntroductionCobalt-base alloys are used for corrosion and wear resistance and high temperature strength [12,13]
Background and motivationFor economical and ethical reasons [1,2] as well as due to health issues [3e5] the possibility to substitute Cobalt with other elements has attracted a lot of attention in a wide range of different applications such as batteries, catalysts, superalloys and cemented carbides [6e11].Cobalt-base alloys are used for corrosion and wear resistance and high temperature strength [12,13]
Fcc and hcp were detected and this was further validated by X-ray diffraction (XRD), see Fig. 3
Summary
Cobalt-base alloys are used for corrosion and wear resistance and high temperature strength [12,13]. It is an important alloying element in, for example, Ni-base superalloys [14,15] and high-speed steels [16,17] and as the major component of the binder phase in cemented carbides [18,19]. Cobalt-base alloys and cobalt as an important alloying element in structural high temperature applications are favored for many reasons, for example, its fcc structure, the possibility to promote a duplex fcc þ hcp structure and its low stacking fault energy [20e25]. By tailoring the relative fractions of fcc and hcp, and the stacking fault energy, through alloy design it is possible to vary ductility, hardness and creep properties in a wide range [27,28]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
