Coordinating influence of multilayer graphene and spherical SnAgCu for improving tribological properties of a 20CrMnTi material

Li, Xiaoxue; Xu, J.L.

doi:10.1039/c7ra12756a

Cited by 9 publications

(6 citation statements)

References 26 publications

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“…As shown in Figure 9(d), hardness values of the layers were approximately 1.45 6 0.23, 7.23 6 0.73, and 5.95 6 0.42 GPa for the lubrication film, grain-refined layer, and the TA-based material, respectively. As discussed by Li and Xu, 28 the appearance of a low-hardness layer (lubrication film) above the high-hardness grain-refined layer (5.95 6 0.58 GPa) facilitated the excellent friction and wear performance.…”

Section: Dong Et Almentioning

confidence: 89%

Investigations on the mechanics and tribology of multilayer graphene nanosheet in TiAl aviation composites

Dong

Yang

Zhang

2021

Advances in Mechanical Engineering

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Requirements of low energy consumption and material-volume reduction in the aerospace industry have spurred improvements of mechanical and tribological behaviors of TiAl (TA) alloys. TA-graphene (TAG) has poorer mechanical properties (6.02 ± 0.42 GPa nano-hardness, 150 ± 12.32 GPa elasticity modulus, and 802 ± 21 MPa yield strength) than (6.25 ± 0.52 GPa nano-hardness, 159 ± 14.21 GPa elasticity modulus, and 850 ± 19 MPa yield strength) of TA-graphene-silver (TAGS). Multilayer graphene nanosheets were curled into small loops to resist the applied forces, and helped to improve the mechanical properties of the TAGS. Subsequently, the graphene nanosheets enhanced the tribological performances as observed by the ball-on-disk tribometer. The following factors were primarily responsible for more excellent tribological behaviors (approximately 0.27 friction coefficient, 2.82 × 10−4 mm3 N−1 m−1 wear rate) of TAGS than those of the TAG: intra-lamellar separation of graphene, graphene-enhanced capacity of wear scar, plastic deformation of silver, the excellent cooperation lubrication of graphene-silver, the low-hardness lubrication film on the grain-refined layer, the well-distributed film grain, and low grain orientation angles.

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Section: Dong Et Almentioning

confidence: 89%

Investigations on the mechanics and tribology of multilayer graphene nanosheet in TiAl aviation composites

Dong

Yang

Zhang

2021

Advances in Mechanical Engineering

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“…Meanwhile, graphene is not easy to cause interface reaction with the matrix, which is better than the reinforcement of particle or whisker material. So far, papers about graphene reinforced iron-matrix composites are relatively scarce, but it has been shown that there is a good bonding interface and high strengthening efficiency between graphene and ironmatrix materials [8,9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of microstructures and properties of graphene reinforced 20CrMnTi materials

Lu¹,

Meng

et al. 2022

J. Phys.: Conf. Ser.

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As a member of low-carbon alloy steels, 20CrMnTi has been widely used to manufacture key-parts, such as gears and shafts, owing to its attractive fatigue resistance and easy of processing. To improve its the mechanical and frictional properties, the preparation of composite is required. In the present study, graphene was added in 20CrMnTi to form Gr/20CrMnTi composites by vacuum high-energy ball milling process and hot-pressing technique. The addition of graphene has a profound influence on the microstructure and properties of 20CrMnTi. A high hardness of 5.83 GPa and a good tensile strength of 1183 MPa were obtained in the 0.5 wt.%-Gr/20CrMnTi, increased by 18.5% and 27.8%, respectively. Meanwhile, the wear resistance reaches a maximum value of 2276.5 cm-3 in the 0.7 wt.%-Gr/20CrMnTi, showing a 491.1% increase than that of pure 20CrMnTi. The layered graphene played an important role in absorbing energy and preventing the propagation of micro-crack.

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“…20CrMnTi steel has high strength, good plasticity and toughness, and good processing performance. Thus far, it has been widely used in aviation, aerospace, automobile, metallurgy, building materials, and other fields [1][2][3]. The service life and operation reliability of 20CrMnTi-made mechanical components require good mechanical properties and wear resistance when used in low speed and heavy load conditions.…”

Section: Introductionmentioning

confidence: 99%

“…20CrMnTi composites incorporated with solid lubricants such as graphene, MoO 3 , SnAgCu, and silver exhibited excellent friction and wear behavior due to the formation of lubrication films [2,7,9]. However, some major issues should be considered during the preparation of such composites: First, graphene and silver lubricants are relatively expensive.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

Men

Lu³

et al. 2022

Coatings

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Microstructure modification is an effective approach to improve the mechanical properties of materials. In the present study, expanded graphite (EG) was added in a 20CrMnTi matrix to form pearlite microstructure and proeutectoid cementite after sintering. Mechanical alloying was used to obtain a fine milled mixture with a ball/powder weight ratio of 20:1. After mechanical alloying for 10 h, the milled mixtures with different EG contents were pressurelessly sintered at 1250 °C for 10 min and then hot-pressed at 1150 °C under 30 MPa for 30 min in Ar to obtain dense and modified 20CrMnTi materials. The content of EG has a profound influence on the microstructure and mechanical properties of 20CrMnTi. A high tensile strength of 1088 MPa and a high Vickers hardness of 4.7 GPa were achieved in the 1% EG-modified 20CrMnTi, which were increased by 105% and 28%, respectively, compared with the pure dense 20CrMnTi. The formed fine pearlite and small proeutectoid cementite in the modified microstructure contributed to the improved mechanical properties of 20CrMnTi.

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Coordinating influence of multilayer graphene and spherical SnAgCu for improving tribological properties of a 20CrMnTi material

Abstract: In order to increase the service life and operational reliability of a 20CrMnTi-steel-based gearing system, the friction and wear behavior of 20CrMnTi needs to be further improved.

Cited by 9 publications

References 26 publications

Investigations on the mechanics and tribology of multilayer graphene nanosheet in TiAl aviation composites

Investigations on the mechanics and tribology of multilayer graphene nanosheet in TiAl aviation composites

Investigation of microstructures and properties of graphene reinforced 20CrMnTi materials

Improvement of Mechanical Properties of 20CrMnTi Steel through Microstructure Modification

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