Influences of the compositions and mechanical properties of HVOF sprayed bimodal WC-Co coating on its high temperature wear performance

In this study, CoNiCrAlY metallic coatings were deposited on an Inconel 718 nickel-based superalloy substrate material using the detonation gun (D-gun) and supersonic plasma spraying (SSPS) techniques. The microstructural and mechanical properties in addition to their room and high temperature wear behavior of the produced coatings were evaluated. The wear tests were performed at room temperature (rt), 250 and 500 °C using 2N and X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) analyses of the worn coatings were performed to assess their wear performance. The coatings produced with D-gun process exhibited higher hardness and lower porosity (550 ± 50 HV0.25 hardness and 1.2 ± 1.0% porosity) than SSPS coatings (with 380 ± 30 HV0.25 hardness and 1.5 ± 1.0% porosity) which resulted in better room- and high temperature wear performance for D-gun coatings. The worn surfaces of both coatings exhibited formation of tribological layers and superficial microstructural changes by varying temperature and load conditions. Increasing load and temperature resulted in increased wear loss whereas increasing temperature resulted in reduced COF values for both coatings.

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Beneficial effects of yttrium on mechanical properties and high-temperature wear behavior of surface aluminized 1045 steel

Wear ◽

10.1016/s0043-1648(03)00056-5 ◽

2003 ◽

Vol 255 (7-12) ◽

pp. 933-942 ◽

Cited By ~ 13

Author(s):

Hojat Ahmadi ◽

D.Y Li

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Wear Behavior ◽

Beneficial Effects ◽

High Temperature Wear ◽

1045 Steel

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High temperature wear performance of laser cladding maraging steel with low nickel on AISI H13 steel

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211012731 ◽

2021 ◽

pp. 095440622110127

Author(s):

Wei Jiang ◽

Shuqi Wang ◽

Lan Wang

Keyword(s):

Thermal Stability ◽

Wear Resistance ◽

High Temperature ◽

Maraging Steel ◽

Laser Cladding ◽

H13 Steel ◽

Wear Performance ◽

High Temperature Wear ◽

Steel Coating ◽

Thermal Stability Of

H13 steel is prone to insufficient high temperature wear resistance due to thermal wear under high temperature conditions. To improve high temperature wear resistance of H13 steel, the maraging steel coating with low-nickel was successfully prepared owing to excellent thermal stability. Sliding wear tests at 400, 500 and 600 °C were carried out for the laser cladding coating and H13 steel to comparatively investigate their high temperature wear performance and mechanism. The microstructure, phases, hardness and thermal stability of the maraging steel coating were also studied. The results showed that the maraging steel coating possessed excellent high temperature wear resistance and effectively improved the high temperature wear resistance of H13 steel by laser cladding. The superior thermal stability of maraging steel played an important role in improving its high temperature wear resistance.

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Effect of Al2O3 nanoparticle reinforcement on the mechanical and high-temperature tribological behavior of Al-7075 alloy

Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology ◽

10.1177/1350650116683627 ◽

2016 ◽

Vol 231 (7) ◽

pp. 900-909 ◽

Cited By ~ 6

Author(s):

Yaping Bai ◽

Yongchun Guo ◽

Jianping Li ◽

Zhong Yang ◽

Jia Tian

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Wear Resistance ◽

High Temperature ◽

Tribological Behavior ◽

High Temperature Wear ◽

Al 7075 ◽

Al2o3 Nanoparticle ◽

7075 Alloy ◽

Hot Pressing Sintering

In this paper, Al2O3/7075 composites were prepared by mechanical alloying with subsequent hot-pressing sintering, and the effect of Al2O3 nanoparticle on the mechanical and tribological behavior of 7075 was studied. The mechanical property results showed that the hardness and compressive strength of Al2O3/7075 composites first increased and then decreased with Al2O3 amount increasing, and 5 wt.% Al2O3 addition made the material exhibit excellent comprehensive mechanical properties. The tribological properties also indicated that 5 wt.% Al2O3 nanoparticle significantly improved the high-temperature wear resistance of 7075 alloys. Thus, all the mechanical and tribological results confirmed that the addition of Al2O3 nanoparticle was a better strengthening way for 7075 alloys at high temperatures.

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