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Direct Laser-Deposited IN718 Alloy: Effect of Heat Treatment Route on Microstructural Evolution and Mechanical Properties.

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Title: Direct Laser-Deposited IN718 Alloy: Effect of Heat Treatment Route on Microstructural Evolution and Mechanical Properties.
Authors: Burad, Prayag1 (AUTHOR), Gullipalli, Chaitanya1 (AUTHOR), Thawari, Nikhil1 (AUTHOR), Gupta, T. V. K.1 (AUTHOR) tvkgupta@mec.vnit.ac.in
Source: Journal of Materials Engineering & Performance. Oct2023, Vol. 32 Issue 19, p8961-8971. 11p.
Subjects: Heat treatment, Semiconductor lasers, Alloys, Laser deposition, Inconel, Microhardness
Abstract: The laser-based additive manufacturing techniques are widely used for the refurbishment of worn-out components. The post-processing treatments on additive manufactured parts will improve the material properties and meet the functional requirements. In this study, the multilayered deposition of Inconel 718, a nickel-based alloy is performed using fiber-coupled diode laser with 4 kW maximum output and 5.5 mm spot diameter of direct laser deposition technique. The fabricated samples were subjected to two different stages of heat treatment namely (i) solution-treated and (ii) solution-treated plus direct aged, aiming to study both stages of microstructural and mechanical properties of the deposit. Microstructural observations are carried out using SEM with EDS and microhardness measurements through Vickers indentation method. Further, the influence of different stages of heat treatment on microstructure formation is investigated individually for all multilayered samples. The heat treatment results show that, at different stages, the morphology and hardness differ irrespective of the number of layers. In addition, solution treatment with direct aging reveals precipitation of γ′ (Ni3Ti) and γ′′ (Ni3Nb) phases in the Ni-γ matrix. Further, a 40 to 50% increment in microhardness was obtained and the two-stage heat treatment process has given better results. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Engineering & Performance is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Direct Laser-Deposited IN718 Alloy: Effect of Heat Treatment Route on Microstructural Evolution and Mechanical Properties.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Engineering+%26+Performance%22">Journal of Materials Engineering & Performance</searchLink>. Oct2023, Vol. 32 Issue 19, p8961-8971. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Semiconductor+lasers%22">Semiconductor lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Laser+deposition%22">Laser deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Inconel%22">Inconel</searchLink><br /><searchLink fieldCode="DE" term="%22Microhardness%22">Microhardness</searchLink>
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  Data: The laser-based additive manufacturing techniques are widely used for the refurbishment of worn-out components. The post-processing treatments on additive manufactured parts will improve the material properties and meet the functional requirements. In this study, the multilayered deposition of Inconel 718, a nickel-based alloy is performed using fiber-coupled diode laser with 4 kW maximum output and 5.5 mm spot diameter of direct laser deposition technique. The fabricated samples were subjected to two different stages of heat treatment namely (i) solution-treated and (ii) solution-treated plus direct aged, aiming to study both stages of microstructural and mechanical properties of the deposit. Microstructural observations are carried out using SEM with EDS and microhardness measurements through Vickers indentation method. Further, the influence of different stages of heat treatment on microstructure formation is investigated individually for all multilayered samples. The heat treatment results show that, at different stages, the morphology and hardness differ irrespective of the number of layers. In addition, solution treatment with direct aging reveals precipitation of γ′ (Ni3Ti) and γ′′ (Ni3Nb) phases in the Ni-γ matrix. Further, a 40 to 50% increment in microhardness was obtained and the two-stage heat treatment process has given better results. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Materials Engineering & Performance is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11665-022-07744-x
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Semiconductor lasers
        Type: general
      – SubjectFull: Alloys
        Type: general
      – SubjectFull: Laser deposition
        Type: general
      – SubjectFull: Inconel
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      – SubjectFull: Microhardness
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      – TitleFull: Direct Laser-Deposited IN718 Alloy: Effect of Heat Treatment Route on Microstructural Evolution and Mechanical Properties.
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            NameFull: Burad, Prayag
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            NameFull: Gullipalli, Chaitanya
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            NameFull: Thawari, Nikhil
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              Text: Oct2023
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              Y: 2023
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