An investigation on the effects of Co, Ti and Si on microstructure, hardness and wear properties of AlCuNiFe based entropy alloys

Unnikrishnan, T.G.; Paul, Cherian; Arul, Sanjivi

doi:10.1016/j.matpr.2017.01.011

Cited by 10 publications

(3 citation statements)

References 24 publications

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“…Moreover, increasing the Al ratio reduced the coefficient of friction (COF) and resulted in a shift from delamination wear to oxidative wear. Unnikrishnan et al [13] investigated the effect of Co, Ti, and Si addition on the wear characteristics of AlCuNiFe alloys. Among these alloys, the highest hardness was obtained upon the addition of Si and Ti.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

2019

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In this study, CoCrFeNiTi 0.5 Al x high-entropy alloys were produced by induction melting and their dry sliding wear behavior was examined at different temperatures. In addition to face-centered cubic (FCC) phases, low amounts of a tetragonal phase were detected in the microstructures of alloys without Al and microscratches were formed by wear particles on the worn surfaces of the alloy specimens. Two body-centered cubic (BCC) phases were detected in the alloy with 0.5Al and a fatigue-related extrusion wear mechanism was detected on the worn surface. The alloy specimen with a high Al content exhibited the best wear characteristics. No wear tracks were formed in single-phase BCC intermetallic alloys at room temperature and they exhibited a higher wear strength at high temperatures when compared to other samples.

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Section: Introductionmentioning

confidence: 99%

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

2019

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“…( 11 ) can be estimated to be 2625 MPa for AlCuSiZnFe HEA, which is close to that of Inconel 718, 625 42 . Such a high hardness value can be attributed to the finer grains and solid-solution hardening because of the duplex Cu–Zn and Fe–Si-rich microstructure 43 , 44 .…”

Section: Resultsmentioning

confidence: 99%

Vacuum brazing of Al2O3 and 3D printed Ti6Al4V lap-joints using high entropy driven AlZnCuFeSi filler

Sharma

Ahn

2021

Sci Rep

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In this work, we studied the brazing characteristics of Al2O3 and 3D printed Ti–6Al–4V alloys using a novel equiatomic AlZnCuFeSi high entropy alloy filler (HEAF). The HEAF was prepared by mechanical alloying of the constituent powder and spark plasma sintering (SPS) approach. The filler microstructure, wettability and melting point were investigated. The mechanical and joint strength properties were also evaluated. The results showed that the developed AlZnCuFeSi HEAF consists of a dual phase (Cu–Zn, face-centered cubic (FCC)) and Al–Fe–Si rich (base centered cubic, BCC) phases. The phase structure of the (Cu–Al + Ti–Fe–Si)/solid solution promises a robust joint between Al2O3 and Ti–6Al–4V. In addition, the joint interfacial reaction was found to be modulated by the brazing temperature and time because of the altered activity of Ti and Zn. The optimum shear strength reached 84 MPa when the joint was brazed at 1050 °C for 60 s. The results can be promising for the integration of completely different materials using the entropy driven fillers developed in this study.

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“…[2] Many other studies mainly focused on the influence of additional elements on tribological and mechanical properties. Adding Al, [53][54][55][56] Cu, [20,57] Ti, [58] Nb, [59][60][61] TiB 2 , [62] graphene nanoplatelets, [63] micrographite and nanographene particles, [64] Co, [65,66] nitriding, [67] Pb and Bi, [68,69] Mo, [70,71] V, [72] Si, [56] Fe, [16] Zr, [33] and Ag [73] led to an improved tribological and mechanical performance at low and high temperature, while addition of Si [74] beyond a critical value led to an increased wear rate due to the reduction of compressive strength and fracture toughness. The wear resistance of Al0.25CoCrFeNiSi0.6 HEA with respect to the presence of Si was investigated by Olga et al [75] The microstructure of HEA was composed of two phases, high-entropy solid-solution matrix-holding FCC crystal structure and low-entropy Cr 3 Si intermetallic compound with BCC structure as the strengthening particle.…”

Section: Introductionmentioning

confidence: 99%

A Study on Outstanding High‐Temperature Wear Resistance of High‐Entropy Alloys

2023

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Wear property is a main reason for failure, especially for those parts which are mechanically moving and interacting with each other in industrial utilization. High‐entropy alloys (HEAs) are considered promising candidates to possess outstanding tribological factors of performance at high temperatures compared with conventional engineering alloys, which have drawn much attention from academic and industrial points of view. This study is performed to survey the influence of microstructure, grain size, precipitation, reinforcement, and elements addition on the wear resistance of HEAs over a wide temperature range. In this respect, the worn microstructure, wear rate, friction coefficient, hardness, wear track, and subsurface are precisely checked. This review also explores the high‐temperature wear resistance of thermally sprayed and additively manufactured HEAs associated with emphasizing the dominant wear mechanisms through in a wide range of temperatures.

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An investigation on the effects of Co, Ti and Si on microstructure, hardness and wear properties of AlCuNiFe based entropy alloys

Cited by 10 publications

References 24 publications

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Analysis of the high-temperature dry sliding behavior of CoCrFeNiTi0.5Alx high-entropy alloys

Vacuum brazing of Al2O3 and 3D printed Ti6Al4V lap-joints using high entropy driven AlZnCuFeSi filler

A Study on Outstanding High‐Temperature Wear Resistance of High‐Entropy Alloys

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