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Browsing by Subject "High entropy alloys"

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2D numerical model for heat transfer on a laser deposited high entropy alloy baseplate using Comsol Multiphysics

Author: Dada, A ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Aramide, O Date: Dec 2021 In an optimization study, cracks were observed in the microstructures of laser-deposited HEAs on a steel baseplate from residual stresses, thus, the optimization of crack-free microstructures was achieved by the optimization of the laser ... Read more
The comparative study of the microstructural and corrosion behaviour of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Aramide, O Date: Jun 2021 Corrosion is a conservational occurrence that has a large economic impact on most metals and its alloys because it destroys and deteriorates most materials by an electrochemical process through the reaction of these materials with the ... Read more
Effect of laser parameters on the properties of high entropy alloys: A preliminary study

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: May 2020 This preliminary study investigates the fabrication of Al-Co-Cr-Fe-Ni-Cu and Al-Ti-Cr-Fe-Co-Ni High Entropy Alloys with the Laser Deposition Technique. The effect of the laser parameters on the microstructure and hardness properties of the ... Read more
The effect of Nb addition on the microstructural, mechanical and electrochemical characteristics of AlCrFeNiCu high entropy alloy

Author: Malatji, N ; Popoola, API ; Lengopeng, T ; Pityana, Sisa L Date: Oct 2020 AlCrFeNiCuNb(subx) high entropy alloys were successfully fabricated using laser metal deposition technique. Laser power of 1600W and scanning speed of 1.2 m/min were used during the processing of the alloys. The microstructural, mechanical ... Read more
Electrical resistivity and oxidation behavior of Cu and Ti doped laser deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Sep 2022 In this study, AlCoCrFeNi–Cu (Cu-based) and AlCoCrFeNi–Ti (Ti-based) high entropy alloys (HEAs) were fabricated using a direct blown powder technique via laser additive manufacturing on an A301 steel baseplate for aerospace applications. The ... Read more
Fabrication and hardness behaviour of high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, A ; Lengopeng, Thabo Date: Feb 2020 Laser additive manufacturing is a direct energy deposition process which manufactures components from 3D model data in progressive layers until a whole part is built as opposed subtractive manufacturing. However, during the procedure, the ... Read more
High entropy alloys for aerospace applications

Author: Dada, M ; Popoola, P ; Adeosun, S ; Mathe, Ntombizodwa R Date: Sep 2019 In the aerospace industry, materials used as modern engine components must be able to withstand extreme operating temperatures, creep, fatigue crack growth and translational movements of parts at high speed. Therefore, the parts produced must ... Read more
High entropy alloys for aerospace applications

Author: Dada, M ; Popoola, P ; Adeosun, S ; Mathe, Ntombizodwa R Date: Sep 2019 In the aerospace industry, materials used as modern engine components must be able to withstand extreme operating temperatures, creep, fatigue crack growth and translational movements of parts at high speed. Therefore, the parts produced must ... Read more
In-situ reactive synthesis and characterization of a high entropy alloy coating by laser metal deposition

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S Date: Mar 2022 In this study, we investigate the influence of in situ reactive synthesis of Ti6Al4V– AlCoCrFeNiCu high entropy alloys by laser metal deposition on the microstructural and mechanical properties of the as-built alloy as opposed to the traditional ... Read more
Influence of Ti and Cu on the corrosion properties of laser-deposited high entropy alloys

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Dlamini, Thembisile P ; Aramide, O Date: Nov 2021 In this study, AlCoCrFeNiCu (Cu-based) and AlCoCrFeNiTi (Ti-based) high entropy alloys were fabricated using laser additive manufacturing. The influence of the alloying elements and the laser processing parameters, the laser power and scanning ... Read more
Investigating the elastic modulus and hardness properties of a high entropy alloy coating using nanoindentation

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Pityana, Sisa L Date: Sep 2021 Using a focused ion beam TTX-NHT3 Nanoindentation tester with a load of 500 mN, we study the micromechanical properties of laser-deposited AlCoCrFeNiCu high entropy alloy coatings. The indentation tests conducted were used to examine the ... Read more
Machine learning-based prediction of phases in high-entropy alloys: A data article

Author: Machaka, Ronald ; Motsi, Glenda T ; Raganya, Mampai L ; Radingoana, Precious M ; Chikosha, Silethelwe Date: Oct 2021 A systematic framework for choosing the most determinant combination of predictor features and solving the multiclass phase classification problem associated with high-entropy alloy (HEA) was recently proposed [1]. The data associated with ... Read more c b n d
Microstructural, mechanical and electrochemical properties of AlCrFeCuNiWx high entropy alloys

Author: Malatji, N ; Lengopeng, T ; Pityana, Sisa L ; Popoola, AP Date: Feb 2021 AlCrFeNiCuWx high entropy alloys were fabricated on 316 L stainless steel substrate using laser metal deposition technique. The microstructural and mechanical characteristics of these alloys were studied by advanced characterization techniques. ... Read more
Optimization of the corrosion property of a high entropy alloy using response surface methodology

Author: Dada, M ; Popoola, P ; Aramide, O ; Mathe, Ntombizodwa R ; Pityana, Sisa L Date: Jun 2020 Laser Additive Manufacturing was used to fabricate AlTiCrFeCoNi high entropy alloy and the corrosion properties of the alloy were investigated in 3.5 wt% NaCl solution. The tests were conducted via potentiodynamic polarization at room temperature ... Read more
Process optimization of high entropy alloys by laser additive manufacturing

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R ; Pityana, Sisa L ; Adeosun, S ; Aramide, O ; Lengopeng, Thabo Date: Aug 2020 Aerospace components and their coatings are required to possess excellent surface properties over a wide temperature range. Stainless steels, titanium, nickel superalloy, and more recently high entropy alloys (HEAs) have been used to improve ... Read more
Recent advances of high entropy alloys for aerospace applications: A review

Author: Dada, M ; Popoola, P ; Mathe, Ntombizodwa R Date: Aug 2021 This study aims to review the recent advancements in high entropy alloys (HEAs) called high entropy materials, including high entropy superalloys which are current potential alternatives to nickel superalloys for gas turbine applications. ... Read more
Recent advances of high entropy alloys: High entropy superalloys

Author: Dada, M ; Popoola, P ; Adeosun, S ; Pityana, Sisa L ; Mathe, Ntombizodwa R ; Aramide, O ; Malatji, N ; Lengopeng, T ; Ayodeji, A Date: Sep 2021 This study reviews the recent technological advancements in manufacturing technique; laser surface modification and material; High Entropy Superalloys. High Entropy Superalloys are current potential alternatives to nickel superalloys for gas ... Read more
Tribological and corrosion properties of laser additive manufactured AlCrFeNiCu high entropy alloy

Author: Malatji, N ; Popoola, API ; Lengopeng, T ; Pityana, Sisa L Date: Feb 2020 High entropy alloys (HEAs) are new class of materials with a high potential to find use in structural applications where high corrosion and wear resistance are required. Their high configurational entropy, sluggish diffusion, cocktail effect ... Read more

Now showing items 1-18 of 18

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