Wear and heat treatment studies on Al7075 alloy hybrid composites

Gangadhar, T.G.; Shankara, D.R.; Adarsh, B.C.

doi:10.1016/j.matpr.2023.01.272

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Along with this oxidation wear and fatigue wear is also possible. Oxidation wear occurs due to the flaking of brittle oxide scales leading to a SWR [ 66 ]. The annealed coated samples showcase refined grain structure along with the enhancement in hardness which results in better wear resistance.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and wear behaviour of AlCoCrFeNi-coated SS316L by atmospheric plasma spray process

Noble,

Radhika,

Natarajan

2024

Science and Technology of Advanced Materials

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The capacity to endure harsh wear in demanding conditions in stainless steel drops under extreme nature and applications. Protecting the surface by providing a coating layer supports the usage in harsh conditions. In this work, SS316L is coated with AlCoCrFeNi high-entropy alloy (HEA) by atmospheric plasma spray process and annealed at 600°C for 2 hours. The AlCoCrFeNi HEA exhibited spherical particles with bcc phase and 20 µm particle size. The coating morphology revealed a uniform coating with a homogeneous distribution of HEA particles over a thickness of 150 µm. The coating post-annealing offered improved microhardness by 12% than the coated sample before annealing. The wear test was executed by varying load, sliding distance, and sliding velocity at normal temperature, 400°C and 600°C and the corresponding worn surface was analysed. The coated samples after annealing showed 57.6%, 87.5%, and 65.4% improved wear resistance at normal temperature than the coated sample before annealing at minimum levels of load, sliding velocity and distance. The wear rate of coated and annealed samples revealed 5.2%, 4.5%, and 4.4% better wear resistance at 400°C than the coated samples before annealing. The worn surface morphology showcased wear mechanisms to be delamination, abrasive wear, and oxide layer formation under all conditions.

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Section: Resultsmentioning

confidence: 99%

Microstructure and wear behaviour of AlCoCrFeNi-coated SS316L by atmospheric plasma spray process

Noble,

Radhika,

Natarajan

2024

Science and Technology of Advanced Materials

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“…An study of the worn surface revealed that abrasive wear operates under lower loads while delamination wear and abrasive wear are combined under greater loads. A rise in sliding velocity indicated that the hybrid composite was experiencing abrasive, delamination, and oxidative wear [27]. The boron carbide and graphite inclusion in aluminum (Al85% + B 4 C 10% + Gr 5%) results in a 3% improvement in tensile strength.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and tribological properties of ultrasonically assisted stir-cast AA7075 metal matrix composites in challenging corrosive environments

K S,

Raj R

et al. 2024

Mater. Res. Express

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Aluminum-based metal matrix composites (AMMCs) find extensive applications in aerospace, automotive, defence and various sectors on account of remarkable mechanical properties, lightweight nature, and excellent dimensional stability. In this research, AA7075 matrix material was reinforced with tungsten carbide ceramic particles with various 0, 5, 10, 15 and 20 weight percentages (wt.%) with the use of Ultrasonic assisted stir casing setup. The stir casted AA7075 MMCs were subjected to XRD, SEM, and density test to analyse the presence of elements, microstructure and density. The tensile, micro hardness, and wear test were performed on AL7075 based MMCs after conducting NaCl based spray test at the condition of spray pressure of 1.2 kg/cm2, spray duration of 120 hours and PH value of 8.2 to determine the micro hardness, Ultimate Tensile Strength and wear resistance. The XRD test confirmed the presence of secondary phases such as Al2Cu, W2C, and MgZn2 with Al and WC phases. The SEM test confirmed the uniform dispersion and no more cluster formation upto 15wt.% WC addition and agglomeration of WC was occurred in the addition of 20wt.% of WC.. The enhancing of wt.% of WC enhanced the Micro hardness, UTS, wear and corrosion resistance up to 15 wt. % addition and decreases by the 20 wt.% WC addition. The higher tensile strength 312 MPa was obtained from AA7075/15wt.%WC composite. The lower wear rate 0.11 mg/m was obtained from AA7075/15wt.%WC at 1000 m sliding distance with 1.2 m/s sliding velocity. The improved mechanical and tribological properties were mainly depended on strengthening mechanisms such as load transfer mechanism and dislocation strengthening mechanism.

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Investigation of Mechanical and Tribological Properties of Al7075-Al2O3-GNPs Hybrid Composites Produced by Powder Metallurgy and Induction Hot Pressing

Işik,

Taşkin,

Şenel

2024

J. of Materi Eng and Perform

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Wear and heat treatment studies on Al7075 alloy hybrid composites

Cited by 4 publications

References 22 publications

Microstructure and wear behaviour of AlCoCrFeNi-coated SS316L by atmospheric plasma spray process

Microstructure and wear behaviour of AlCoCrFeNi-coated SS316L by atmospheric plasma spray process

Enhanced mechanical and tribological properties of ultrasonically assisted stir-cast AA7075 metal matrix composites in challenging corrosive environments

Investigation of Mechanical and Tribological Properties of Al7075-Al2O3-GNPs Hybrid Composites Produced by Powder Metallurgy and Induction Hot Pressing

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