Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization

In the present investigation, laser-induction welding using oscillating beam guidance is employed to joint sheets of nodular grey cast iron, which typically exhibit poor weldability properties. Through non-destructive dye-penetrant testing, a reduction of more than 50% in crack density as a result o...

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Autores principales:	N. Sommer, S. Böhm
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2022
Materias:	Laser beam welding Nodular cast iron Laser-induction welding Oscillating beam guidance Electron microscopy Microstructure Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/57927eff0a4e4dbf889af1d8aa55f372
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spelling	oai:doaj.org-article:57927eff0a4e4dbf889af1d8aa55f3722021-11-28T04:38:38ZLaser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization2666-330910.1016/j.jajp.2021.100078https://doaj.org/article/57927eff0a4e4dbf889af1d8aa55f3722022-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666330921000388https://doaj.org/toc/2666-3309In the present investigation, laser-induction welding using oscillating beam guidance is employed to joint sheets of nodular grey cast iron, which typically exhibit poor weldability properties. Through non-destructive dye-penetrant testing, a reduction of more than 50% in crack density as a result of manipulted thermal cycles is identified. The microstructural and chemical characterization using scanning electron microscopy, energy dispersive X-ray spectroscopy and electron backscatter diffraction reveal the formation of brittle cementite lamellae with austenite/ferrite at the inter-lamellar spaces. The direction of beam oscillation and, thus, melt pool dynamics as well as thermal history exhibit a substantial influence on hardness and tensile properties, which are favourable for specimens welded with beam oscillation perpendicular to the traverse direction. Here, the maximum hardness of EN-GJS-400–15 specimens is reduced to around 700 HV. Yet, embrittlement and cleavage fracture originating from cold-cracks and pores within the weld metal are observed as well and emphasize the ongoing challenges of welding nodular grey cast iron.N. SommerS. BöhmElsevierarticleLaser beam weldingNodular cast ironLaser-induction weldingOscillating beam guidanceElectron microscopyMicrostructureMaterials of engineering and construction. Mechanics of materialsTA401-492ENJournal of Advanced Joining Processes, Vol 5, Iss , Pp 100078- (2022)
institution	DOAJ
collection	DOAJ
language	EN
topic	Laser beam welding Nodular cast iron Laser-induction welding Oscillating beam guidance Electron microscopy Microstructure Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Laser beam welding Nodular cast iron Laser-induction welding Oscillating beam guidance Electron microscopy Microstructure Materials of engineering and construction. Mechanics of materials TA401-492 N. Sommer S. Böhm Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
description	In the present investigation, laser-induction welding using oscillating beam guidance is employed to joint sheets of nodular grey cast iron, which typically exhibit poor weldability properties. Through non-destructive dye-penetrant testing, a reduction of more than 50% in crack density as a result of manipulted thermal cycles is identified. The microstructural and chemical characterization using scanning electron microscopy, energy dispersive X-ray spectroscopy and electron backscatter diffraction reveal the formation of brittle cementite lamellae with austenite/ferrite at the inter-lamellar spaces. The direction of beam oscillation and, thus, melt pool dynamics as well as thermal history exhibit a substantial influence on hardness and tensile properties, which are favourable for specimens welded with beam oscillation perpendicular to the traverse direction. Here, the maximum hardness of EN-GJS-400–15 specimens is reduced to around 700 HV. Yet, embrittlement and cleavage fracture originating from cold-cracks and pores within the weld metal are observed as well and emphasize the ongoing challenges of welding nodular grey cast iron.
format	article
author	N. Sommer S. Böhm
author_facet	N. Sommer S. Böhm
author_sort	N. Sommer
title	Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
title_short	Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
title_full	Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
title_fullStr	Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
title_full_unstemmed	Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
title_sort	laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization
publisher	Elsevier
publishDate	2022
url	https://doaj.org/article/57927eff0a4e4dbf889af1d8aa55f372
work_keys_str_mv	AT nsommer laserinductionweldingofnodulargreycastironusingoscillatingbeamguidancemicrostructuralandmechanicalcharacterization AT sbohm laserinductionweldingofnodulargreycastironusingoscillatingbeamguidancemicrostructuralandmechanicalcharacterization
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Laser-induction welding of nodular grey cast iron using oscillating beam guidance-microstructural and mechanical characterization

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