The microstructure of Ta alloying layer on M50 steel after surface alloying treatment induced by high current pulsed electron beam

Luo, Dian; Tang, Guangze; Ma, Xinxin; Li, Gu; Wang, Liqin; Wu, Tingbao; Ma, Fuqiu

doi:10.1016/j.vacuum.2016.11.036

Cited by 35 publications

(6 citation statements)

References 38 publications

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“…A 400-nm thick Ta coating was first deposited on polished M50 steel in argon at a pressure of 0.5 Pa by direct current magnetron sputtering in a DLZ-01 system including film/coating deposition and HCPEB treatment units [47]. A pure Ta target (ϕ50 mm × 5 mm, 99.95% in molar fraction) was used for the deposition.…”

Section: Preparation Of Hcpeb-treated Ta Coatingmentioning

confidence: 99%

“…Other sputtering parameters were: a substrate bias voltage of −100 V, a target power of 140 W, a sputtering power of 35 W, and a sputtering time of 720 s. With a constant target voltage (350 V) and current (0.06 A), the deposited thickness was controlled by the sputtering time (depositing time). After the deposition, the coating side was rotated to face the electron gun (electron beam diameter ≤100 mm) for HCPEB irradiation [47]. The electron beam unit (RITM-2M) mainly consisted of an electron gun (a plasma anode and an explosive emission cathode), a high-voltage pulse generator, a control system, and a power supply.…”

Section: Preparation Of Hcpeb-treated Ta Coatingmentioning

confidence: 99%

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Texturing Effect of Crater-Like Cavities Induced by High-Current Pulsed Electron Beam (HCPEB) Irradiation

Tang

Zhao

et al. 2018

Coatings

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High-current pulsed electron beam (HCPEB) irradiation commonly induces crater-like cavities on irradiated surfaces, making them tribologically resemble textured ones. However, the effect of crater-like cavities on the lubricated tribological properties of HCPEB-treated surfaces has not been reported in the literature. This work was aimed at exploring the potential texturing effect of the crater-like cavities. Surfaces with continuous and uniform crater-like cavities were prepared through HCPEB irradiating a 400-nm thick Ta coating that was pre-deposited on polished M50 steel. Their boundary tribological behaviors were studied while sliding in chemically inert, low-viscosity hydrocarbon fuel JP-10 against a Si3N4 ball under 2.0–4.0 GPa. At 2.0 GPa, the coefficient of friction (COF) and wear rate of the polished M50 steel were above 0.16 on average, with large fluctuation, and 1.49 × 10−5 mm3/N·m (a rectangle-like profile of 167.9 μm × 8.1 μm), respectively. In comparison, the HCPEB-treated Ta coating had a stable, marginally fluctuant COF of 0.11 and a near-zero wear rate. Under other higher loads, the HCPEB-treated Ta coating still exhibited a stable COF of 0.11 on average with small fluctuation, and its wear track width was only half that of the M50 steel. The analysis of the wear topographies indicates that the substantial reduction in both the COF and wear rate was mainly due to the texturing effect originating from the crater-like cavities.

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Section: Preparation Of Hcpeb-treated Ta Coatingmentioning

confidence: 99%

Section: Preparation Of Hcpeb-treated Ta Coatingmentioning

confidence: 99%

Texturing Effect of Crater-Like Cavities Induced by High-Current Pulsed Electron Beam (HCPEB) Irradiation

Tang

Zhao

et al. 2018

Coatings

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“…It was found that the hardness decreased and surface roughness increased for TiN/TiO 2 coated samples. DianLuo et al [49] conducted investigation with Tantalum as an alloying element in the steel surface at different deposition thickness for electron beam treatment. The decrease in micro hardness of the alloy was observed less than 10% at 400 nm Ta film deposited.…”

Section: Advanced Surface Treatment Processesmentioning

confidence: 99%

Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

Kumar

Singh

et al. 2018

Tribology Online

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This literature study is based on the research work conducted in the field of erosion behavior of steel alloys. The focus is on the surface modification of the steel alloys by heat treatment, surface hardening and surface coating methods. Laser cladding and laser hardening processes are also explained. The influence of tribological parameters on the erosion is explained. Steel alloys are chosen because of a wide number of applications due to their excellent properties. Efforts have been made to understand the cause and the remedial action towards the improvements in wear performance. Suitable surface treatment method on the steel alloys may definitely do this work but there should be a need of proper control over the process parameters. The environmental conditions of the laboratory are differing from the real working environment. Hence, the results which are satisfactory at the laboratory are not doing well in real place of application.

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“…With the development of aero-engines towards large thrust-to-weight ratios, the aviation industry has continuously increased the requirements for aviation bearing, which not only requires high reliability, but also requires a long service life. The practice has shown that M50 has good reliability and long service life in high temperature environments, 1,2 so it is widely used to manufacture high temperature bearings.…”

Section: Introductionmentioning

confidence: 99%

A method for predicting subsurface fatigue life of rolling bearings based on macro–micro coupling model

Chang¹,

Chen²,

Liu³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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The fatigue life of the bearing can be predicted effectively by combining the multifield coupling condition of the working process with the internal microstructure. In this paper, a bearing fluid lubrication model is established based on the computational fluid dynamics method, and the calculation result is coupled to the thermal-solid model by the grid mapping method. Through this method, a bearing thermal-fluid-solid multifield coupling dynamics model is established to obtain the evolution information of bearings. Simultaneously, the micro-characterization experiments of SKF6406 bearing (M50 bearing steel) were carried out by electron backscatter diffraction, scanning electron microscope and nano-indentation. The microstructure model of bearing containing micro-inclusions was established by the Voronoi method. On this basis, the microscopic stress distribution characteristics and the motion law of bearing microstructure under the multifield coupling action are solved. In the end, the fatigue life prediction method of rolling bearing was established.

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The microstructure of Ta alloying layer on M50 steel after surface alloying treatment induced by high current pulsed electron beam

Cited by 35 publications

References 38 publications

Texturing Effect of Crater-Like Cavities Induced by High-Current Pulsed Electron Beam (HCPEB) Irradiation

Texturing Effect of Crater-Like Cavities Induced by High-Current Pulsed Electron Beam (HCPEB) Irradiation

Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

A method for predicting subsurface fatigue life of rolling bearings based on macro–micro coupling model

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