The current work investigates the hot corrosion demeanour of Hastelloy X weldment produced with autogenous mode through key-hole plasma arc welding (K-PAW). The hot corrosion test has been performed for weldment in molten salt-1 (MS-1) (75 % Na2SO4 + 25 % V2O5) and molten salt-2 (MS-2) (75 % Na2SO4 + 20 % V2O5 + 5 % NaCl) circumstance for 25 hrs (25 cycles) at 900 °C. The MS-1 substrate of both base metal and weldment provided the lowest weight gain than the MS-2 substrate. The NaCl in the MS-2 causes severe hot corrosion on the substrate, whereas the absence of NaCl in MS-1 reduces the hot corrosion effects. The highest parabolic constant is observed for K-PAW weldment in MS-2 condition. The tendency of hot corrosion rate follows the order of, Base Metal MS-1 < K-PAW MS-1 < Base Metal MS-2 < K-PAW MS-2. The occurrence of protective phases like chromium oxides (Cr2O3), spinel oxides (NiCr2O4 and NiFe2O4) Nickel oxide (NiO) on the substrate resist the further oxidation. But, the development of MoO3 and Fe2O3 phases are increased the cracking as well as spallation rate which promotes severe corrosion of the substrates. The plasma arc welded substrate and base metal in MS-1 condition are giving better resistance than in MS-2 at 900 °C.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Hot Corrosion Demeanour of Key-Hole Plasma Arc Welded Aerospace Grade Hastelloy X in Molten Salts Environment


    Weitere Titelangaben:

    Sae Int. J. Adv. and Curr. Prac. in Mobility



    Kongress:

    International Conference on Advances in Design, Materials, Manufacturing and Surface Engineering for Mobility ; 2020



    Erscheinungsdatum :

    2020-09-25


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Study on the High Temperature Tensile Properties of Aerospace Grade Hastelloy X Joined by Pulsed Current Arc Welding

    Naiju, CD / Mohan, Cigurupadi Ganesan / Gokulkumar, Kesavan et al. | SAE Technical Papers | 2020


    Metallurgical examination of Hastelloy x for corrosion

    Morris, G. / McDonnell Aircraft Corporation | TIBKAT | 1964


    Studies on Metallurgical and Mechanical Properties of Plasma Arc Welded Aerospace 80A Grade Alloy

    Naiju, CD / Manoharan, Manikandan / Sathishkumar, Mathiyazhagan et al. | SAE Technical Papers | 2020


    Metallurgical examination of Hastelloy x for corrosion

    Morris, G. / McDonnell Aircraft Corporation | TIBKAT | 1964


    Investigation of Metallurgical and Mechanical Properties of Hastelloy X by Key-Hole Plasma Arc Welding Process

    Naiju, Chooriyaparambil Damodaran / Manikandan, Manoharan / Sathishkumar, Mathiyazhagan | SAE Technical Papers | 2019