Investigation of a novel functionally graded material for the repair of premium hypereutectoid rails using laser cladding technology

Lai, Quan; Abrahams, Ralph; Yan, Wenyi; Qiu, Cong; Mutton, Peter; Paradowska, Anna; Soodi, Mehdi

doi:10.1016/j.compositesb.2017.07.089

Cited by 84 publications

(35 citation statements)

References 44 publications

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“…Generation of individually tailored 3D metallic parts has been established by laser beam or electron beam based powder bed processes. Furthermore, direct energy deposition (DED) as laser metal deposition (LMD) with metal powders or wires may be used for the generation of 3D structures (see [6][7][8]), repair of degraded components [9,10] and application of functional graded alloy systems [11,12]. For manufacturing of highly individual 3D components, the laser powder bed fusion (LPBF) may be applied where a laser beam is used to selectively melt metal powders.…”

Section: Introductionmentioning

confidence: 99%

Additive manufacturing of CuCr1Zr by development of a gas atomization and laser powder bed fusion routine

Jahns

Bappert

Böhlke

et al. 2020

Int J Adv Manuf Technol

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The research focuses on alloy design, powder production, and laser powder bed fusion (LPBF) of copper alloys. Copper and its alloys play a fundamental role for modern industrial applications due to their excellent thermal and electric conductivity in conjunction with considerable mechanical strength, for example, as welding electrodes and nozzles. By precipitation hardening, the hardness of low-alloyed copper, like CuCr1Zr, can be increased significantly. A combination of the geometry freedom of additive manufacturing with a tailor-made alloy design during powder production offers the opportunity to develop new alloy systems with a focus on the respective application. Experimental results regarding gas atomization, LPBF, property investigations, and property optimization of CuCr1Zr are presented. Powder particles and LPBF parts were analyzed with respect to phase and precipitate formation and compared to benchmark experiments of conventionally cast copper alloys. The microstructure differs significantly. Furthermore, the relative density of the LPBF parts reaches a value of 99.8%.

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Section: Introductionmentioning

confidence: 99%

Additive manufacturing of CuCr1Zr by development of a gas atomization and laser powder bed fusion routine

Jahns

Bappert

Böhlke

et al. 2020

Int J Adv Manuf Technol

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“…Up to date, researches on the tribological performance of wheel/rail materials mainly focus on the laser-related treatment of wheel/rail materials [9][10][11][12][13][14][15], the wheel/rail hardness matching [16,17], the selection and matching of wheel/rail materials [18] and various wheel/rail creep ratios [19]. As a potential and promising technique to extend the railway component service life, laser cladding technology performed on rail steels can improve and enhance their microstructural and mechanical properties [9,10,13], increase the hardness and enhance the wear resistant performances [9,14,15] and affect the residual stress distribution of laser-cladded rails [20]. Lai et al [9] investigated the effects of laser depositing directions and heat treatment modes on the microstructural and mechanical properties of laser-cladded rail repairs, and their published findings corroborated the corresponding strength and hardness distribution in the laser deposited layers, which are the crucial indications of wear and mechanical behavior of the cladded hypereutectoid rails.…”

Section: Introductionmentioning

confidence: 99%

“…As a potential and promising technique to extend the railway component service life, laser cladding technology performed on rail steels can improve and enhance their microstructural and mechanical properties [9,10,13], increase the hardness and enhance the wear resistant performances [9,14,15] and affect the residual stress distribution of laser-cladded rails [20]. Lai et al [9] investigated the effects of laser depositing directions and heat treatment modes on the microstructural and mechanical properties of laser-cladded rail repairs, and their published findings corroborated the corresponding strength and hardness distribution in the laser deposited layers, which are the crucial indications of wear and mechanical behavior of the cladded hypereutectoid rails. Roy et al [13] evaluated the mechanical characteristics of laser-cladded hypereutectoid steel rails, and they found that the improvement in tensile properties was related to a more favorable microstructure, which gave rise to a more dimpled morphology of the fractographic analysis of the tested samples.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Wear and Damage Characteristics of Machined Wheel/Rail Materials under Dry Rolling-Sliding Condition

Liu

Quan

Wan

et al. 2020

Metals

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To guarantee the smooth operation of trains, rail grinding and wheel turning are necessary practices to remove surface defects. Surface integrity of machined wheel/rail materials is significant to affect their tribological performance. In this paper, firstly, the wheel specimens were turned by a CNC lathe and the rail specimens were ground by a cylindrical grinding machine with various machining parameters. Then, the wear and damage behavior of the machined wheel/rail discs was systematically investigated via a twin-disc wear testing apparatus under dry rolling-sliding condition. The experimental results show that the surface hardness of rail discs after machining is slightly higher than that of wheel discs, while the surface roughness and plastic deformation layer of wheel discs are much larger than those of rail discs. The surface hardness increase degree of rail discs and their thickness of plastic deformation layer are greater than those of wheel discs after the rolling-sliding test. The wear loss of wheel discs is much larger than that of rail discs. Surface roughness, hardness and plastic deformation layer of wheel/rail discs after machining exert a comprehensive effect on the wear behavior, and friction pair with appropriate original surface hardness and roughness generates the smallest amount of wear loss.

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“…With this feature, the SPS technology has a better prospect to be applied in spraying high-pressure parts of propulsion systems, e.g., the turbine engine blade. Apart from plasma spray, there are also studies and experiments on the application of physical vapor deposition and laser cladding technology [71] to prepare thermal barrier coatings used in propulsion systems. However, due to the complex preparation process, high preparation cost, and poor repeatability, these technologies are not mature enough as compared to the APS technology.…”

Section: Latest Research Progress Of Thermal Barrier Coatingmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

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Combined-cycle engine is a potential propulsion system for hypersonic aircraft. To ensure long-term, normal operation of combined-cycle engine under the harsh environment of high thermal load, it is of great significance to study the thermal protection and management of the propulsion system. In this study, the objective and development status of thermal protection and thermal management systems for the combined-cycle propulsion system were described. The latest research progresses of thermal protection, thermal barrier coating, and thermal management system of the combined-cycle propulsion system were summarized. Moreover, the problems and shortcoming in current researches were summarized. In addition, a prospect for the future development of thermal protection and management of the combined-cycle propulsion system was presented, pointing out a direction of great value and vital research significance to thermal protection and management of the combined-cycle propulsion system.

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Investigation of a novel functionally graded material for the repair of premium hypereutectoid rails using laser cladding technology

Cited by 84 publications

References 44 publications

Additive manufacturing of CuCr1Zr by development of a gas atomization and laser powder bed fusion routine

Additive manufacturing of CuCr1Zr by development of a gas atomization and laser powder bed fusion routine

Experimental Investigation on the Wear and Damage Characteristics of Machined Wheel/Rail Materials under Dry Rolling-Sliding Condition

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

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