Effect of Heat Treatment on Niobium Segregation of Laser-Cladded IN718 Alloy Coating

Zhang, Yaocheng; Li, Zhuguo; Nie, Pulin; Wu, Yixiong

doi:10.1007/s11661-012-1459-z

Cited by 81 publications

(15 citation statements)

References 24 publications

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“…In addition to the effect of preheating, multiple thermal cycles can lead to unusual microstructure heterogeneity and phase evolution of Ni‐based superalloys. Zhang et al and Tabernero et al have independently evaluated the micro‐hardness distribution in as‐deposited Inconel 718 through laser cladding and both of these studies revealed an intrinsic heterogeneity across the build. The hardness of the top of the part was invariably lower than that of the bottom of the part.…”

Section: Alloy Development For Metal Ammentioning

confidence: 99%

Metal Alloys for Fusion‐Based Additive Manufacturing

et al. 2018

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Metal additive manufacturing (AM) is an innovative manufacturing technique, which builds parts incrementally layer by layer. Thus, metal AM has inherent advantages in part complexity, time, and waste saving. However, due to its complex thermal cycle and rapid solidification during processing, the alloys well suit and commercially used for metal AM today are limited. Therefore, it is important to understand the alloying strategy and current progress with materials performance to consider alloy development for metal AM. This review presents the current range of alloys available for metal AM, including titanium, steel, nickel, aluminum, less common alloys (including Mg alloys, metal matrix composites alloys, and low melting point alloys), and compositionally complex alloys (including bulk metallic glasses and high entropy alloys) with a focus on the relationship between compositions, processing, microstructures, and properties of each alloy system. In addition, some promising alloy systems for metal AM are highlighted. Approaches for designing and optimizing new materials for metal AM have been summarized.

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Section: Alloy Development For Metal Ammentioning

confidence: 99%

Metal Alloys for Fusion‐Based Additive Manufacturing

et al. 2018

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“…12,13 Most of this research focuses on either developing thermal models or characterizing microstructure and properties. [14][15][16][17][18][19][20] Recently, the role of heterogenous properties in Inconel 718 builds was pointed out by hardness mapping, electron backscatter diffraction imaging (EBSD), and electron microscopy. 5,21 Makiewicz characterized the effect of laser melted thermal build history for Inconel 718.…”

Section: B Application Of Am To Inconel 718mentioning

confidence: 99%

Thermal effects on microstructural heterogeneity of Inconel 718 materials fabricated by electron beam melting

et al. 2014

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Additive manufacturing technologies, also known as 3D printing, have demonstrated the potential to fabricate complex geometrical components, but the resulting microstructures and mechanical properties of these materials are not well understood due to unique and complex thermal cycles observed during processing. The electron beam melting (EBM) process is unique because the powder bed temperature can be elevated and maintained at temperatures over 1000°C for the duration of the process. This results in three specific stages of microstructural phase evolution: (a) rapid cool down from the melting temperature to the process temperature, (b) extended hold at the process temperature, and (c) slow cool down to the room temperature. In this work, the mechanisms for reported microstructural differences in EBM are rationalized for Inconel 718 based on measured thermal cycles, preliminary thermal modeling, and computational thermodynamics models. The relationship between processing parameters, solidification microstructure, interdendritic segregation, and phase precipitation (d, c9, and c0) are discussed.

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“…Extensive work has been conducted by researchers for model development and material property characterization for laser AM process [9,10,11,12,13,14,1,15,16] . Previous work on EBM Inconel 718 has focused on characterizing the as-fabricated and post-processed microstructure.…”

Section: Introductionmentioning

confidence: 99%

Computational modeling of residual stress formation during the electron beam melting process for Inconel 718

Prabhakar

Sames

Dehoff

et al. 2015

Additive Manufacturing

108

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A computational modeling approach to simulate residual stress formation during the Electron Beam Melting (EBM) process within the Additive Manufacturing (AM) technologies for Inconel 718 is presented in this paper. The EBM process has demonstrated a high potential to fabricate components with complex geometries, but the resulting components are influenced by the thermal cycles observed during the manufacturing process. When processing nickel based superalloys, very high temperatures (approx. 1000 • C) are observed in the powder bed, base plate, and build. These high temperatures, when combined with substrate adherence, can result in warping of the base plate and affect the final component by causing defects. It is important to have an understanding of the thermo-mechanical response of the entire system, that is, its mechanical behavior towards thermal loading occurring during the EBM process prior to manufacturing a component. Therefore, computational models to predict the response of the system during the EBM process will aid in eliminating the undesired process conditions, a-priori, in order to fabricate the optimum component. Such a comprehensive computational modeling approach is demonstrated to analyze warping of the base plate, stress and plastic strain accumulation within the material, and thermal cycles in the system during different stages of the EBM process.

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Effect of Heat Treatment on Niobium Segregation of Laser-Cladded IN718 Alloy Coating

Cited by 81 publications

References 24 publications

Metal Alloys for Fusion‐Based Additive Manufacturing

Metal Alloys for Fusion‐Based Additive Manufacturing

Thermal effects on microstructural heterogeneity of Inconel 718 materials fabricated by electron beam melting

Computational modeling of residual stress formation during the electron beam melting process for Inconel 718

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