The influence of the welding method on the heat resistance of welded joints of Inconel 718 thin metal sheets

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Zenon A Opiekun
Agnieszka Jędrusik


The paper presents the in uence of GTAW welding and laser without the addition of binders, thin sheets of Inconel 718 on the creep resistance of the connectors. Process sample creep resistance specimens of fused- ber couplers were carried out using creep testing machine using a constant temperature of 860±2 °C and a constant stress σ = 150 MPa. The tests have shown that welded joints of these sheets made with a laser, both in the state of their delivery and after heat treatment, have about 60-80% higher heat resistance than joints made using the GTAW method. 

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W pracy przedstawiono wpływ spawania metodą GTAW i laserem bez dodatku spoiwa, cienkich blach ze stopu Inconel 718 na żarowytrzymałość ich złączy. Technologiczne próby żarowytrzymałości próbek ze złączami spawanymi prowadzono przy użyciu pełzarki w stałej temperaturze wynoszącej 860±2 °C i przy stałym naprężeniu σ = 150 MPa. Badania wykazały, że złącza spawane tych blach wykonane laserem zarówno w stanie ich dostawy, jak i po obróbce cieplnej posiadają o ok. 60÷80% większą żarowytrzymałość niż złącza wykonane metodą GTAW. 


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Z. A. Opiekun and A. Jędrusik, “The influence of the welding method on the heat resistance of welded joints of Inconel 718 thin metal sheets”, Weld. Tech. Rev., vol. 89, no. 12, Dec. 2017.


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