CO2 laser spot welding of thin sheets AISI 321 austenitic stainless steel

• Autorzy: Shehab A. A. , Nawi S. A. , Al-Rubaiy A. AAG , Hammoudi Z. , Hafedh S. A. , Abass M. H. , Alali M. S. , Ali S. D.

Identyfikatory

DOI

10.5604/01.3001.0014.6974

• Języki publikacji: EN

Abstrakty

EN

Purpose: The present work aims to investigate the influence of CO2 laser spot welding (LSW) parameters on welding profile and mechanical properties of lap joint of AISI 321 thin sheet metals, and analyze the welding profile numerically by finite element (FE) method. Design/methodology/approach: The weld carried out using 150 W CO2 continues wave laser system. The impact of exposure time and laser power on the welding profile was investigated using an optical microscope. Microhardness and tensile strength tests were used to evaluate the mechanical properties of the joint. Ansys software was utilized to simulate the welding profile numerically. Findings: The results revealed that 2 s exposure time and 50 W power have led to uniform welding profile and highest shear force (340 N), lower hardness gradient across the heat affected zone (HAZ) and fusion zone (FZ). Finite element (FE) analysis of the welding profile showed good agreement with experimental analysis. Research limitations/implications: The selection of laser spot welding parameters for thin sheet metal was critical due to the probability of metal vaporisation with extra heat input during welding. Practical implications: Laser welding of AISI 321 steel is used in multiple industrial sectors such as power plants, petroleum refinement stations, pharmaceutical industry, and households. Thus, selecting the best welding parameters ensures high-quality joint. Originality/value: The use of CO2 laser in continuous wave (CW) mode instead of pulse mode for spot welding of thin sheet metal of AISI 321 austenitic stainless steel consider a real challenge because of the difficulty of control the heat input via proper selection of the welding parameters in order to not burn the processed target. Besides, the maintenance is easier and operation cost is lower in continuous CO2 than pulse mode.

Słowa kluczowe

EN

thin sheet metal; austenitic stainless steel; CO2 CW LSW; mechanical properties; welding profile; FE analysis

PL

cienkie blachy; stal austenityczna nierdzewna; CO2 CW LSW; właściwości mechaniczne; profil spawalniczy; analiza elementów skończonych

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2020
• Tom: Vol. 106, nr 2
• Strony: 68--77
• Opis fizyczny: Bibliogr. 27 poz.

Twórcy

autor

Shehab A. A.

• Department of Materials Engineering, University of Diyala, Diyala, Iraq

autor

Nawi S. A.

• Department of Materials Engineering, University of Diyala, Diyala, Iraq

autor

Al-Rubaiy A. AAG

• Department of Materials Engineering, University of Diyala, Diyala, Iraq

autor

Hammoudi Z.

• Department of Mechanical Engineering, University of Diyala, Diyala, Iraq

autor

Hafedh S. A.

• Department of Electrical Power and Machines Engineering, University of Diyala, Diyala, Iraq

autor

Abass M. H.

• Ministry of Oil, Midland Oil Company, Baghdad, Iraq

autor

Alali M. S.

• Department of Materials Engineering, University of Kufa, Najaf, Iraq

autor

Ali S. D.

• Department of Mechanical Engineering, University of Diyala, Diyala, Iraq

Bibliografia

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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)