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This paper presents an investigation into effect of nitrogen content of shielding gas mixture on weld geometry, microstructure and hardness of pulsed laser welded 2205 duplex stainless steel. Full penetration autogenous welding was performed on 2 mm thick plates using a low power pulsed Nd: YAG laser. light and scanning electron microscopy were used to study the resulting microstructures. It is observed that 2 mm full penetrated joint decreases to 1.8 mm by dominating nitrogen in argon-nitrogen mixture. Different morphologies of austenite phase as well as an increase of 8% of its content can be observed in pure nitrogen shielded welds. Average weld grain size in sample which is welded in nitrogen atmosphere stands at approximately 41 μm which is smallerthan that of argon atmosphere which is about 51 μm. Micro-hardness test reveals that hardness values increase from 280 HV in base metal to 307 HV in weld center line and the shielding gas mixture does not significantly influence the weld hardness.
Wydawca
Czasopismo
Rocznik
Tom
Strony
187--195
Opis fizyczny
Bibliogr. 26 poz., fot., rys., tab., wzory
Twórcy
autor
- Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
autor
- Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
autor
- Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Bibliografia
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- [20] N. Sivagurumanikandan, S. Saravanan, G. Shanthos Kumar, S. Raju, K. Raghukandan, Optik. 157, 833-840 (2018).
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Uwagi
Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-ea637e9e-5c2d-4af0-87f7-6b080528765f