Improvement of material performance of Inconel 718 formed by high deposition-rate laser metal deposition

Chen, Zhong; Gasser, Andrés; Kittel, Jochen; Wissenbach, Konrad; Poprawe, Reinhart

doi:10.1016/j.matdes.2016.03.006

Cited by 147 publications

(53 citation statements)

References 25 publications

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“…% of Nb distributed in the matrix in sample 3 was higher than that in sample 1 while in sample 5 (no vibration applied) the concentration of Nb was higher than that in samples 1 and 3. This can prove than the distribution of Nb in the no-vibration condition was poorer and segregation may be an issue in this sample as mentioned in the literature [2,3]. Moreover, the uniform distribution of the other elements in samples 1 and 3 demonstrates that ultrasonic vibrations could significantly inhibit the segregation of the alloying elements during solidification.…”

Section: Sem Investigationssupporting

confidence: 56%

“…Inconel 718 (IN 718) is a Ni-base, precipitation hardenable alloy with unique properties including high yield, tensile strength, creep-rupture properties [1] and excellent impact strength, fracture toughness at low temperatures, and corrosion resistance [2]. Owing to these properties, IN 718 is widely used in aviation and aerospace industries as well as gas turbine engines and cryogenic tankage.…”

Section: Introductionmentioning

confidence: 99%

“…Owing to these properties, IN 718 is widely used in aviation and aerospace industries as well as gas turbine engines and cryogenic tankage. However, this alloy is mostly employed at temperatures ranging from −250°C to 750°C and its performance is limited at temperatures higher than 750°C owing to decreased toughness and wear properties caused by the formation of carbides and intermetallic compounds as a result of the Nb segregation [2,3]. The wear mechanisms including lamination occur in this superalloy due to the accumulation of dislocations behind the obstacles and the force applied by these accumulated dislocations cause plastic deformation and microscopic pores [4].…”

Section: Introductionmentioning

confidence: 99%

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Effects of lateral and vertical ultrasonic vibrations on the microstructure and microhardness of Stellite-6 coating deposited on Inconel 718 superalloy through laser metal deposition

Hosseini-Tayeb¹,

Rafiaei

2020

Mater. Res. Express

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In this research work, Stellite-6 was deposited on an Inconel 718 substrate via laser metal deposition (LMD) process. Lateral and vertical ultrasonic vibrations were applied during the LMD process at 150 W and 250 W to achieve improved properties. The resultant coatings were evaluated by scanning electron microscopy (SEM) equipped with an energy dispersive spectroscopy (EDS) analyzer and optical microscopy. Also, the microhardness values of two samples (without vibration and with vertical vibration) were measured. The results showed that applying ultrasonic vertical vibrations led to significant changes in the microstructure of the coatings and the coating/substrate interface i.e. a better distribution of alloying elements of the coating was achieved, the number of the secondary arms increased, and the porosity percentage decreased significantly. Moreover, the microhardness value in the sample synthesized at 150 W and under vertical vibrations were higher than that in the sample produced without vibrations.

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Section: Sem Investigationssupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of lateral and vertical ultrasonic vibrations on the microstructure and microhardness of Stellite-6 coating deposited on Inconel 718 superalloy through laser metal deposition

Hosseini-Tayeb¹,

Rafiaei

2020

Mater. Res. Express

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“…Superalloy Inconel718 has excellent high temperature strength, fatigue resistance, and good high temperature creep resistance, and is extensively used in the manufacture of high temperature structural parts applied in aerospace, energy, military, and other fields . However, in some harsh working environments, these parts often bear both large thermal loads and force loads, such as the turbine blade, whose surface is often damaged by shock and wear .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Inconel718–NiCrAlY Composites Prepared by Laser Engineered Net Shaping

et al. 2018

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Near-defect-free block Inconel718-NiCrAlY composites prepared by laser engineered net shaping are investigated in this study. XRD, SEM, and EDS are applied to analyze the phase composition and microstructure characteristics. The mechanical properties are evaluated by microhardness tester and friction-wear tester. The results show that NiAl brittle intermetallic compounds precipitate in the matrix when NiCrAlY content reaches 60% or more. With the increase of NiCrAlY ratio, the distribution of NiAl changes from intergranular precipitation to intragranular precipitation, and the dendrites growth directions become chaotic. The microhardness of composites improves as the NiCrAlY content rises, reaching to 419 HV for 100% NiCrAlY, and solid solution strengthening has better strengthening effect on microhardness than precipitation strengthening. The wear loss has a clear decrease only when 80% or more NiCrAlY is added, with the maximum wear loss drop of 15.66% for 100%NiCrAlY. The wear mechanisms change from the coexistence of adhesive wear and abrasive wear to mainly abrasive wear with micro brittle fractures when NiCrAlY content is high.

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“…For similar equipment, the productivity is 2-3 times less [12][13][14]. There are experimental stands with the same high productivity (up to 2 kg/h), preferably [15]. The main feature of the developed equipment is a modular assembly type, which allows to modernize the installation at the customer's request.…”

Section: Introductionmentioning

confidence: 99%

Theory and Technology of Direct Laser Deposition

Turichin¹,

Klimova-Korsmik²

2018

Additive Manufacturing of High-Performance Metals and Alloys - Modeling and Optimization

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Presently the additive technologies in manufacturing are widely developed in all industrialized countries. Replacing the traditional technology of casting and machining with additive technologies, one can significantly reduce material consumption and labor costs. They also allow obtaining products with desired properties. The most promising for manufacturing large-sized products is the additive technology of high-speed direct laser deposition. Using this technology allows to create complex parts and construction to one technological operation without using addition equipment and tools. This technology allows decreasing of consumption of raw materials and decrease amount of waste. Equipment for realization of DLD technology is universal and based on module design principle. DLD is based on layer-by-layer deposition and melting of powder by laser beam from using a sliced 3D computer-aided design (CAD) file. The materials used are powders based on Fe, Ni, and Ti. This chapter presents the results of machine design and research HS DLD technology from various materials.

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Improvement of material performance of Inconel 718 formed by high deposition-rate laser metal deposition

Cited by 147 publications

References 25 publications

Effects of lateral and vertical ultrasonic vibrations on the microstructure and microhardness of Stellite-6 coating deposited on Inconel 718 superalloy through laser metal deposition

Effects of lateral and vertical ultrasonic vibrations on the microstructure and microhardness of Stellite-6 coating deposited on Inconel 718 superalloy through laser metal deposition

Microstructure and Mechanical Properties of Inconel718–NiCrAlY Composites Prepared by Laser Engineered Net Shaping

Theory and Technology of Direct Laser Deposition

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