Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Kotkowiak, Mateusz; Piasecki, Adam; Kotkowiak, Michał; Kulka, Michał

doi:10.1007/s12666-018-1391-z

Cited by 6 publications

(2 citation statements)

References 32 publications

(30 reference statements)

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“…The hardness values in sample SM2 increase initially w.r.to base matrix Al6061 and then decrease, as shown in Figure 12. This phenomenon occurs because the Ni and Cr particles improve the crystallization of the composite material, enhancing its strength and hardness 41) .…”

Section: Hardnessmentioning

confidence: 99%

Optimizing Al6061-Based Hybrid Metal Matrix Composites: Unveiling Microstructural Transformations and Enhancing Mechanical Properties Through Ni and Cr Reinforcements

Kumar,

Kedar Narayan Bairwa

2023

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This study investigates the development of Al6061-based Hybrid Metal Matrix Composites (HMMCs) reinforced with nickel (Ni) and chromium (Cr) to enhance their mechanical properties. Employing the stir casting method, the research aimed to achieve a homogeneous distribution of Ni and Cr particles, varying from 1 to 3 wt.%, in the Al6061 matrix. Additional elements like graphite (up to 3 wt.%) and magnesium (1 wt.%) were incorporated to improve selflubrication and wettability. The fabrication process involved precise temperature control at 750°C and automatic stirring to ensure even dispersion of the reinforcing particles. The composites were then molded, solidified, and prepared for mechanical testing. SEM-EDS analysis was utilized to analyze the elements' distribution and the composites' microstructural integrity. Mechanical tests, including tensile, flexural, and hardness tests, followed ASTM standards. Significant findings revealed that the specimen with two wt.% Ni and two wt.% Cr (designated as SM2) demonstrated the most balanced improvement in mechanical properties: a tensile strength of 236.08 MPa, a flexural strength of 417.70 MPa, and a hardness of 127.00 HRB. However, an increase in Ni and Cr content beyond 4 wt.% led to non-homogeneous dispersion, manifesting as cracks, voids, and agglomeration, negatively impacting ductility and elongation properties. The study's unique contribution lies in its detailed examination of the effects of varying Ni and Cr concentrations on the mechanical properties of Al6061-based composites, providing valuable insights for material optimization in highperformance applications. This research underscores the delicate balance required in composite material design, particularly in enhancing specific mechanical properties without compromising overall material integrity. It provides crucial insights into the role of Ni and Cr reinforcements in Al6061 composites, highlighting their potential for engineering applications that demand high strength, flexibility, and hardness.

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Section: Hardnessmentioning

confidence: 99%

Optimizing Al6061-Based Hybrid Metal Matrix Composites: Unveiling Microstructural Transformations and Enhancing Mechanical Properties Through Ni and Cr Reinforcements

Kumar,

Kedar Narayan Bairwa

2023

Evergreen

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“…If copper is added to nickel, alloys will be characterized by high corrosion resistance in alkaline solutions, salts, and seawater. Moreover, Cobalt increases corrosion resistance at high temperatures [ 7 , 8 ]. One of the most frequently used nickel-based ceramics composites are Ni-Cr composite materials with varying additions of chromium or its compounds [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Wear Properties of Pure Nickel Modified by Ni-Cr Composite and CaF2 Solid Lubricant Addition

Kotkowiak

Piasecki

2022

Materials

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Nickel composites doped by chromium and calcium fluoride were produced by powder metallurgy. The friction coefficient of the samples containing 20% of the CaF2 was lower at elevated temperatures (600 °C) than the friction coefficient for the Ni-50%NiCr(80/20) composite (0.14 vs. 0.20). Sample surfaces were analyzed by the scanning electron microscope (SEM). EDS analysis proved tribofilm formation on the surface of the sample with CaF2 addition. A laser confocal microscope (LCM) was used to investigate the surface condition of the counter-sample after wear tests. The presence of the tribofilm reduced the wear of the frictional pair, and because of that the wear tracks were smooth. Tribofilm limited the abrasive wear and ploughing. Therefore, the tribofilm protected the sample and counter-sample from wear.

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Morphology and microstructure of Yb2O3 layer formed over aluminide coating produced by pack cementation of Haynes® 263 alloy

Morgiel,

Dudziak,

Rząd

et al. 2024

Archiv.Civ.Mech.Eng

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Heat-Resisting Aluminized Coatings Modified by Chromium Addition Produced on Nickel-Based Alloys

Cited by 6 publications

References 32 publications

Optimizing Al6061-Based Hybrid Metal Matrix Composites: Unveiling Microstructural Transformations and Enhancing Mechanical Properties Through Ni and Cr Reinforcements

Optimizing Al6061-Based Hybrid Metal Matrix Composites: Unveiling Microstructural Transformations and Enhancing Mechanical Properties Through Ni and Cr Reinforcements

Characterization of Wear Properties of Pure Nickel Modified by Ni-Cr Composite and CaF2 Solid Lubricant Addition

Morphology and microstructure of Yb2O3 layer formed over aluminide coating produced by pack cementation of Haynes® 263 alloy

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