Processing and Characterization of NiCr-YSZ Compositionally Graded Coatings on Superalloy using Laser Engineered Net Shaping (LENS)

Srinivas, V.; Savitha, U.; Reddy, G. Jagan

doi:10.1016/j.matpr.2018.09.044

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Deposition of Ti/HA interfacial layer on Ti-6Al-4V using LENS™, followed by plasma spraying of HA, to improve bond strength and increase osteoconductivity of metallic implants [34] Ni-18Al-11Cr-9C and Ni-14Al-8Cr-29C Improved wear resistance [35] YSZ (yttria stabilized zirconia) on Ni based superalloy Good thermal barrier protection and good thermal cycling resistance [36] ZTA (zirconia toughened alumina)…”

Section: Materials System Reported Functionality or Application Or Promentioning

confidence: 99%

State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design

2019

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Additive manufacturing (AM) is a new paradigm for the design and production of high-performance components for aerospace, medical, energy, and automotive applications. This review will exclusively cover directed energy deposition (DED)-AM, with a focus on the deposition of powder-feed based metal and alloy systems. This paper provides a comprehensive review on the classification of DED systems, process variables, process physics, modelling efforts, common defects, mechanical properties of DED parts, and quality control methods. To provide a practical framework to print different materials using DED, a process map using the linear heat input and powder feed rate as variables is constructed. Based on the process map, three different areas that are not optimized for DED are identified. These areas correspond to the formation of a lack of fusion, keyholing, and mixed mode porosity in the printed parts. In the final part of the paper, emerging applications of DED from repairing damaged parts to bulk combinatorial alloys design are discussed. This paper concludes with recommendations for future research in order to transform the technology from “form” to “function,” which can provide significant potential benefits to different industries.

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Section: Materials System Reported Functionality or Application Or Promentioning

confidence: 99%

State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design

2019

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“…Laser engineered net shaping (LENS) is an additive manufacturing technology that is used to manufacture parts with enhanced property by melting a powder and depositing onto substrate with high energy laser beam [1][2][3]. This technology has become an academic and industrial focus because of the exceptional physical property, high density, and low pore rate of the finished product [4,5].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Micro-Hardness, Wear Resistance, and Defects of 316L Stainless Steel and TiC Composite Coating Fabricated by Laser Engineered Net Shaping

et al. 2019

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The influence of processing parameters in laser engineered net shaping (LENS) on the properties of 316L stainless steel and titanium carbide (TiC) composite coating was studied. The key processing parameters were laser power, scanning speed, TiC powder ratio, and powder feed rate. Mathematical models were developed to investigate the micro-hardness, wear volume, and defect area of the coating. The accuracy of the models was examined by analysis of variance and experimental validation. Results showed that micro-hardness was positively correlated with TiC powder ratio. Increasing TiC powder ratio could reduce the wear volume. In addition, the wear volume displayed an increase then decrease with increasing laser power and decreasing scanning speed. Both scanning speed and TiC powder ratio showed a recognizable impact on the defect area. Reducing the scanning speed and TiC powder ratio can effectively reduce the defect area. The targets for the processing parameters optimization were set to maximize micro-hardness, minimize wear volume, and defect area. The difference between the model prediction value and experimental validation result for micro-hardness, wear volume, and defect area were 0.46%, 4.54%, and 8.82%, respectively. These results provide guidance for the LENS processing parameters optimization in controlling and predicting of 316L/TiC composite coating properties.

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Past and present of functionally graded coatings: Advancements and future challenges

Fathi

Wei

Saleh

et al. 2022

Applied Materials Today

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Processing and Characterization of NiCr-YSZ Compositionally Graded Coatings on Superalloy using Laser Engineered Net Shaping (LENS)

Cited by 5 publications

References 12 publications

State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design

State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design

Investigation of Micro-Hardness, Wear Resistance, and Defects of 316L Stainless Steel and TiC Composite Coating Fabricated by Laser Engineered Net Shaping

Past and present of functionally graded coatings: Advancements and future challenges

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