Wear Resistance of High-Entropy Alloys

Mechanical properties and high temperature oxidation resistance of (AlCrTiV)N coatings synthesized by cathodic arc deposition

“…In the last decade a new class of material, High Entropy Alloys (HEA), has seen a drastic increase in interest for many fields [4] from nuclear science [5] to medicine [6] as well as additive manufacturing [7], catalysis [8] and especially machining [9,10]. HEAs are made of multiple principal elements, each participating between 5 and 35 at.% of the composition [11,12].…”

“…High configurational entropy may lead to single-phase solid solutions, usually with a cubic nanocrystalline structure or amorphous. These multi-principal element systems often display distorted lattices with sluggish diffusion [13], cocktail effect [13,14] and interesting mechanical properties such as increased ductility [15][16][17], high hardness [15][16][17][18] and great resistance to wear [10,19] and oxidation [14,19]. Many studies show that the introduction of nitrogen into an HEA film increases its hardness and wear resistance even in extreme conditions to the point that some High Entropy Alloy Nitride (HEAN) coatings are proposed by reviewers as replacements for protective coatings like TiN, TiAlN or CrN in the machining industry [9,20,21].…”

Effects of Ge addition on the structure, mechanical and magnetic properties of (CoCrFeNi)100-xGex high-entropy alloys

“…Different from traditional metallurgical theory, HEAs have high mixed entropy which favors them to form simple solid solution structures, such as FCC, BCC and HCP (hexagonal close-packed) phases, rather than complex intermetallic compounds. Due to solid solution strengthening and the intrinsic structural characters, HEAs may display excellent properties, such as high strength [2][3][4], high thermal stability [5][6][7], extreme damage-tolerance [8], good wear [9,10] and corrosion resistance [11,12], which greatly promotes the application of high entropy alloys as functional and engineering materials.…”

What is the Enthalpy Contribution to the Stabilization of the Co–Cr–Fe–Mn–Ni Faced-centered Cubic Solid Solution?

“…They are multi-component alloys forming a solid solution and in which all components are very concentrated. A large and growing body of literature has shown that these alloys have promising properties, such as good combination of strength and ductility [3,4,5,6,7,8], but also resistance to corrosion [9,10], improved wear resistance [11,12] and significant thermal stability [13].…”