Evaluation of wear resistance of a novel carbide-free bainitic steel

Franceschi, Mattia; Soffritti, Chiara; Fortini, Annalisa; Pezzato, Luca; Garagnani, Gian Luca; Dabalà, Manuele

doi:10.1016/j.triboint.2022.108071

Cited by 14 publications

(6 citation statements)

References 46 publications

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“…These are silicon-based steels (>1.5 wt.%) characterized by ultimate tensile strength values above 2000 MPa and elongation up to 20% [19,20]. These findings have thus served as inspiration for numerous studies that have led to the development of novel steel compositions with tailored properties, which have found applications in various industrial sectors thanks to the remarkable weight reduction of the structures [21][22][23][24][25][26][27][28]. For example, currently, tunnel boring machines, high-power generators, components for wind turbines [29], and diesel injector systems [29] are manufactured with nanostructured steels.…”

Section: Introductionmentioning

confidence: 94%

Laser Powder Bed Fusion Fabrication of a Novel Carbide-Free Bainitic Steel: The Possibilities and a Comparative Study with the Conventional Alloy

Franceschi,

Yazdanpanah,

Leone

et al. 2024

Metals

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A newly developed medium-carbon carbide-free bainitic steel was fabricated for the first time utilizing the laser powder bed fusion (L-PBF) technique. Process parameters were optimized, and a high density of 99.8% was achieved. The impact of austempering heat treatment on the bainite morphology and transformation kinetics was investigated by high-resolution microstructural analysis (SEM, TEM, and EDS) and dilatometric analysis, and results were compared with conventionally produced counterparts. Faster kinetics and finer microstructures in the L-PBF specimens were found as a consequence of the as-built microstructure, characterized by fine grains and high dislocation density. However, a bimodal distribution of bainitic ferrite plate thickness (average value 60 nm and 200 nm, respectively) was found at prior melt pool boundaries resulting from carbon depletion at such sites.

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Section: Introductionmentioning

confidence: 94%

Laser Powder Bed Fusion Fabrication of a Novel Carbide-Free Bainitic Steel: The Possibilities and a Comparative Study with the Conventional Alloy

Franceschi,

Yazdanpanah,

Leone

et al. 2024

Metals

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“…The increasing need for enhanced reliability and efficiency in components, coupled with the imperative to reduce frictional losses and achieve higher power density, has raised the tribological requirements on contact surfaces. Surface engineering techniques, as well as coatings and lubricant approaches, have been widely studied and adopted to decrease friction and wear [2][3][4]. Surface texturing is a surface engineering technique to reduce friction, as highlighted by several studies [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Machining Process on the Wear Properties of Self-Mated Structural Steel in Dry Sliding Conditions

Garagnani,

Baroni,

Fortini

et al. 2024

Metals

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This work investigates the tribological behavior of a machined S355JR structural steel in dry sliding conditions for the development of an innovative seismic dissipation system. Flat-ended pins and disks were made of the same structural steel to simulate the conformal contact of different device parts. Pins were machined by turning, while disks were milled and turned to obtain a nominal average surface Ra roughness ranging from 0.8 µm to 6.3 µm. The influence of the surface roughness on the coefficient of friction (COF), specific wear rate (SWR), and time to steady-state (TSS) was investigated. Tribological tests were conducted reciprocating motion in dry sliding conditions to simulate the operating conditions of the device, with 1 Hz and 2 Hz reciprocating frequencies and an applied normal load of 50 N. The Rsk and Rku roughness parameters helped to better understand the tribological response of milled and turned disks, having an influence on the TSS and SWR.

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“…such microstructure is obtained after austempering treatments. it consists of an austenitizing stage followed by rapid quenching and isothermal holding in a hot bath at a temperature between the bainite start (B s ) and martensite start (M s ) temperatures for a predetermined interval of time [5][6][7]. According to the literature [8], carbide-free bainitic steels are promising materials also for applications in which high wear resistance is required.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Microstructure and Mechanical Properties of High-Carbon and High-Manganese Cast Steel Subjected to Bainitic Reaction

Garbień,

Kokosza,

Maj

et al. 2023

Archives of Metallurgy and Materials

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EffEct of HEat trEatmEnt on microstructurE and mEcHanical ProPErtiEs of HigH-carbon and HigH-manganEsE cast stEEl subjEctEd to bainitic rEactionThe new cast steel with a chemical composition of Fe-(0.85-0.95)C-(1.50-1.60)si-(2.40-2.60)Mn-(1.0-1.2)Al-(0.30-0.40)-Mo-(0.10-0.15)V-(1.0-1.1)Ni (all in wt.%) was investigated in aspect of formation of the multiphase microstructure leading to high strength and ductility. Two types of heat treatment technologies were developed. The first one involves softening annealing at a temperature of 650°C for 4 hours, heating up to 950°C and holding for 2 hours, and then fast cooling down to 200°C and isothermally treated for 2 hours. The second one involves homogenizing annealing at 1100°C for 6 hours, then cooling with furnace down to 950°C and holding for 2 hours, then fast cooling down to 200°C and isothermally treated for 2 hours. A unique microstructure of cast steel consisting of martensite and retained austenite plates of various thicknesses and volume fractions was obtained. Additionally, nanometric transition carbides were noticed after the above-mentioned heat treatments. This microstructure ensures high hardness, strength and plasticity (Rm = 1426 MPa and A = 9.5%), respectively, due to the fact that TWiP/TRiP processes occur during deformation related to the high volume fraction of retained austenite, which the stacking fault energy is above 15 mj/m -2 resulting from the chemical composition of the investigated cast steel.

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Evaluation of wear resistance of a novel carbide-free bainitic steel

Cited by 14 publications

References 46 publications

Laser Powder Bed Fusion Fabrication of a Novel Carbide-Free Bainitic Steel: The Possibilities and a Comparative Study with the Conventional Alloy

Laser Powder Bed Fusion Fabrication of a Novel Carbide-Free Bainitic Steel: The Possibilities and a Comparative Study with the Conventional Alloy

Influence of the Machining Process on the Wear Properties of Self-Mated Structural Steel in Dry Sliding Conditions

Effect of Heat Treatment on Microstructure and Mechanical Properties of High-Carbon and High-Manganese Cast Steel Subjected to Bainitic Reaction

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