Adjustment of Hardness of (CrFeMn)x(NiyAl)1−x, (y = 1,3 and x = 0.6,0.72,0.80) High Entropy Alloys by Deliberate Control of Intermetallic Phase Formation: Microstructural Evolution, Hardness and Dry-Sliding Wear Response

C. Mathiou; D. Ganara; E. Georgatis; A. Poulia; K. Lentzaris; A. E. Karantzalis

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자료유형: 학술저널

저자정보: C. Mathiou (University of Ioannina) D. Ganara (University of Ioannina) E. Georgatis (University of Ioannina) A. Poulia (University of Ioannina) K. Lentzaris (University of Ioannina) A. E. Karantzalis (University of Ioannina)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.1

발행연도: 2021.1

수록면: 175 - 192 (18page)

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In this work, the softening of the hard, NiAl containing, Cr–Fe–Mn–Al–Ni high entropy alloy system by the introductionof Ni3Al,an intrinsically ductile intermetallic compound, is reported. The alloys were prepared by vacuum arc melting andtheir phase formation prediction models were verified in terms of the actual presented microstructural features. X-ray analysisrevealed the presence of NiAl and Ni3Alintermetallic compounds in each HEA system group. The microstructure of allsix examined alloys in their as-cast condition consisted of two phases (NiAl-rich B2 and FeCr-rich A2) featuring variouseutectic morphologies, while spinodal decomposition was evident in every case. The NiAl–Cr pseudo-binary phase diagramwas used for the explanation of the solidification sequence in each alloy. In terms of mechanical properties, HRC hardnessmeasurements showed that higher amounts of Ni3Alcan lower the alloys’ hardness up to half its initial value. Finally, dryslidingwear testing revealed an oxidation-delamination mode of material removal in both HEAs group, while the Ni3Alcontaining alloys also exhibited parts of abrasive wear mode.

#High entropy alloys · Intermetallic alloys and compounds · Solidification · Microstructure · X-ray techniques · Sliding wear

참고문헌 (49)

참고문헌 신청

J.-W. Yeh / 2004 / Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes / Advanced Engineering Materials 6(5):299~303

Cheng Zhang / 2019 / Multifunctional Non-Equiatomic High Entropy Alloys with Superelastic, High Damping, and Excellent Cryogenic Properties / Advanced Engineering Materials 21(1):1800941

C. Zhang / 2018 / Design of non-equiatomic high entropy alloys with heterogeneous lamella structure towards strength-ductility synergy / Scr. Mat 154:78~82

T. Nagase / 2018 / Microstructure of equiatomic and non-equiatomic Ti–Nb–Ta–Zr–Mo high-entropy alloys for metallic biomaterials / J. Alloys Compd 753:412~421

S. Gorsse / 2018 / From high-entropy alloys to complex concentrated alloys / C. R. Phys 19:721~736

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