Microstructure and wear properties of TiC-strengthened high-manganese steel matrix composites fabricated by hypereutectic solidification

Luo, Zhi‐Chao; Ning, Jie; Wang, J.; Zheng, Kan

doi:10.1016/j.wear.2019.202970

Cited by 23 publications

(5 citation statements)

References 34 publications

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“…The precipitation region of TiC particles is above the solidus, and the brown line is the point where precipitation begins; this point indicates that TiC particles precipitate near the end of solidification. The precipitation of TiC particles is closely related to the contents of Ti and C in the solution, and TiC particles precipitate earlier when the contents of Ti and C increase [31,32]. This phenomenon is consistent with the thermodynamic calculation results.…”

Section: Resultssupporting

confidence: 89%

Study on the precipitation mechanisms of TiC particles in steel matrix composites fabricated by eutectic solidification

Huang

Liu²,

Deng³

et al. 2023

Mater. Res. Express

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The precipitation mechanisms of TiC eutectic particles in steel matrix composites prepared by eutectic solidification are studied through thermodynamic calculations and experimental analyses. The results indicate that the eutectic TiC particles begin to precipitate when the concentrations of Ti and C in the residual molten steel reach a eutectic point during the solidification process. The mass fractions of Ti and C in SMCs play significant roles in the precipitation time, particle characteristics and precipitation mechanism characteristics of TiC eutectic particles. When the mass fractions of Ti and C in SMC are low, TiC particles precipitate in the form of divorced eutectic solidification, showing strip, block and irregular shapes that are mainly distributed on the grain boundaries. When the mass fractions of Ti and C are high, TiC particles precipitate in the form of eutectic solidification, showing flake and dendritic shapes that are distributed on the grain boundaries and also in the grains. There are orientation relationships between the eutectic particles and the matrix.

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Section: Resultssupporting

confidence: 89%

Study on the precipitation mechanisms of TiC particles in steel matrix composites fabricated by eutectic solidification

Huang

Liu²,

Deng³

et al. 2023

Mater. Res. Express

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show abstract

“…29,30 However, it can be seen from Figure 7(b) that the worn surfaces is covered by furrows with little material spalling phenomenon, and its main wear mechanism was micro-cutting. 31 Under the condition of sulfur-containing boundary lubrication, Figure 7(c) shows the worn surface of the Al7075 alloy exhibiting parallel grooves and scratches together with rows of furrows. These parallel grooves and scratches on the worn surface indicate the occurrence of abrasive wear, which resulted from abrasive contact between the grinding ball of Al 2 O 3 and Al7075 alloy.…”

Section: Analysis Of Static Immersion Corrosion Morphologymentioning

confidence: 99%

Tribofilm formation on the VN/7075 composite surface under sulfur-containing boundary lubrication

Bai

Liu

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this paper, Al7075 alloy and 15 wt% VN/7075 composite were prepared by ball milling and hot-press sintering. The microstructure, hardness, and wear behavior under different working conditions (environmental condition: dry friction, sulfur-containing boundary lubrication, and oil lubrication) were studied. The results showed that the distribution of VN was dispersive and uniform in 15 wt% VN/7075 composite without obvious agglomeration. The hardness (119.5 Hv) of 15 wt% VN/7075 composite was 46.1% higher than the Al7075 alloy (81.8 Hv). Friction and wear behavior test results showed that under sulfur-containing boundary lubrication condition, according to the tribofilm layer on the worn surface of 15 wt% VN/7075 composite, the friction coefficient of 15 wt% VN/7075 composite decreased by 37.6% compared with the Al7075 alloy. The main wear mechanism of 15 wt% VN/7075 composite was delamination wear and abrasive wear under dry friction, while under sulfur-containing boundary lubrication and oil lubrication, it changed to mild abrasive wear.

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“…Precipitation of fine carbides via alloying with vanadium, [3] titanium, [4] and niobium [5] can provide additional hardness which in turn can bolster gouging resistance, [6] which is critical during these early stages of use. A challenge in pursuing this strategy is to arrive at a suitable dispersion and to avoid formation of harmful carbides, which degrades toughness.…”

Section: Introductionmentioning

confidence: 99%

Hardening Due to Vanadium Carbides Formed During Short-Time Aging of Hadfield Steels

Wang

Bruel

Wang

et al. 2023

Metall Mater Trans A

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Precipitation hardening is a promising approach for strengthening of Hadfield steels. The present study examines the potential to achieve this by combining vanadium addition (up to 2 wt pct) with short-time aging (15 minutes) at 1173 K (900 °C). It was found that such a treatment is sufficient to generate a dispersion of nanoscale precipitates that provided a significant increase in hardness. Small-angle neutron scattering and transmission electron microscopy measurements were performed to quantify the particle dispersion, and Orowan precipitate hardening predictions made using the parameters thus obtained show good correspondence with the observed rates of age hardening, suggesting the precipitates are resistant to shearing. The present steels containing vanadium showed a small reduction in work-hardening capacity and this is believed to be due to carbon depletion from the matrix. It is concluded that the addition of vanadium and a short aging treatment at 1173 K (900 °C) provide a promising pathway to imparting hardness increases that provide gouge resistance during the running-in period of components made from Hadfield steel. For optimum performance, additional carbon should be added to maintain the solute carbon content of the matrix, and hence the matrix work-hardening rate.

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Microstructure and wear properties of TiC-strengthened high-manganese steel matrix composites fabricated by hypereutectic solidification

Cited by 23 publications

References 34 publications

Study on the precipitation mechanisms of TiC particles in steel matrix composites fabricated by eutectic solidification

Study on the precipitation mechanisms of TiC particles in steel matrix composites fabricated by eutectic solidification

Tribofilm formation on the VN/7075 composite surface under sulfur-containing boundary lubrication

Hardening Due to Vanadium Carbides Formed During Short-Time Aging of Hadfield Steels

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