High-Temperature Mechanical Properties of IN718 Alloy: Comparison of Additive Manufactured and Wrought Samples: Comparison of additive manufactured and wrought samples
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2020-08-09
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Abstract
Wire Arc Additive Manufacturing (WAAM) is one of the most appropriate additive manufacturing techniques for producing large-scale metal components with a high deposition rate and low cost. Recently, the manufacture of nickel-based alloy (IN718) using WAAM technology has received increased attention due to its wide application in industry. However, insufficient information is available on the mechanical properties of WAAM IN718 alloy, for example in high-temperature testing. In this paper, the mechanical properties of IN718 specimens manufactured by the WAAM technique have been investigated by tensile tests and hardness measurements. The specific comparison is also made with the wrought IN718 alloy, while the microstructure was assessed by scanning electron microscopy and X-ray diffraction analysis. Fractographic studies were carried out on the specimens to understand the fracture behavior. It was shown that the yield strength and hardness of WAAM IN718 alloy is higher than that of the wrought alloy IN 718, while the ultimate tensile strength of the WAAM alloys is difficult to assess at lower temperatures. The microstructure analysis shows the presence of precipitates (laves phase) in WAAM IN718 alloy. Finally, the effect of precipitation on the mechanical properties of the WAAM IN718 alloy was discussed in detail.
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Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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Additive manufacturing , Fractography , High temperature test , IN718 , Mechanical properties , General Chemical Engineering , General Materials Science , Condensed Matter Physics , Inorganic Chemistry , SDG 9 - Industry, Innovation, and Infrastructure , Project ID , info:eu-repo/grantAgreement/EC/H2020/764979/EU/European Network for Alloys Behaviour Law Enhancement/ENABLE , info:eu-repo/grantAgreement/EC/H2020/764979/EU/European Network for Alloys Behaviour Law Enhancement/ENABLE , Funding Info , This project received funding from the European Union’s Marie Skłodowska–Curie Actions (MSCA) Innovative Training Networks (ITN) H2020-MSCA-ITN-2017 under the grant agreement No. 764979 and Basque Government QUALYFAM project, ELKARTEK 2020 program (KK-2020/00042) and HARIPLUS project, HAZITEK 2019 program (ZL-2019/00352). , This project received funding from the European Union’s Marie Skłodowska–Curie Actions (MSCA) Innovative Training Networks (ITN) H2020-MSCA-ITN-2017 under the grant agreement No. 764979 and Basque Government QUALYFAM project, ELKARTEK 2020 program (KK-2020/00042) and HARIPLUS project, HAZITEK 2019 program (ZL-2019/00352).
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Bhujangrao , T , Veiga , F , Suárez , A , Iriondo , E & Mata , F G 2020 , ' High-Temperature Mechanical Properties of IN718 Alloy: Comparison of Additive Manufactured and Wrought Samples : Comparison of additive manufactured and wrought samples ' , Crystals , vol. 10 , no. 8 , 689 , pp. 1-13 . https://doi.org/10.3390/cryst10080689 , https://doi.org/10.3390/cryst10080689