Oğuz TUNÇEL, Şükriye ÇETİN, Hakan AYDIN

Effect of Laser Power on Mechanical and Microstructure Properties of Pulsed Nd:YAG Laser Welded Dissimilar DP600- DP1000 Steel Sheets

In the present study, dissimilar dual-phase (DP) steel sheets (DP600-DP1000) were double-sided welded withNd:YAG (Neodymium-doped Yttrium Aluminum Garnet (Y3Al5O12)) laser device and the effect of laser poweron mechanical and microstructural properties of welded sheets was investigated. Laser welds were conductedusing SISMA SWA300 Nd:YAG laser welding machine in the flat position with the butt joint. DP600 and DP1000steels with a 1 mm thickness were selected for the experiments. Laser power was changed from 20% to 75%,and other welding parameters were kept constant. To evaluate the welded samples, tensile, microhardness andoptical microscope tests were performed. As a result of the study, in high laser power values, good quality weldswere obtained. In microstructural studies, it was observed that three different regions were formed in the weldsection; fusion zone (FZ), heat affected zone (HAZ) and base material (BM). These three regions were composedof different phase structures; FZ: martensite, bainite and retained austenite, HAZ: martensite, bainite, ferrite,retained austenite and tempered martensite, BM: ferrite and martensite. Also, different hardness values weremeasured in these different regions, particularly in the FZ highest microhardness values were measured due toeffective martensite formation.

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[1] Ghadbeigi, H., Pinna, C., Celotto, S., Yates, J.R., (2010). Local plastic strain evolution in a high strength dual-phase steel. Materials Science and Engineering A 527(18–19): 5026–32, Doi: 10.1016/j. msea.2010.04.052.
[2] Ghassemi-Armaki, H., Maaß, R., Bhat, S.P., Sriram, S., Greer, J.R., Kumar, K.S., (2014). Deformation response of ferrite and martensite in a dual-phase steel. Acta Materialia 62(1): 197–211, Doi: 10.1016/j. actamat.2013.10.001.
[3] Dong, D., Liu, Y., Yang, Y., Li, J., Ma, M., Jiang, T., (2014). Microstructure and dynamic tensile behavior of DP600 dual phase steel joint by laser welding. Materials Science and Engineering A 594: 17–25, Doi: 10.1016/j.msea.2013.11.047.
[4] Torkamany, M.J., Malek Ghaini, F., Poursalehi, R., (2014). Dissimilar pulsed Nd: YAG laser welding of pure niobium to Ti-6Al-4V. Materials and Design 53: 915–20, Doi: 10.1016/j.matdes.2013.07.094.
[5] Hazratinezhad, M., Mostafa Arab, N.B., Sufizadeh, A.R., Torkamany, M.J., (2012). Mechanical and metallurgical properties of pulsed neodymium-doped yttrium aluminum garnet laser welding of dual phase steels. Materials and Design 33(1): 83–7, Doi: 10.1016/j.matdes.2011.06.070.
[6] Xue, X., Pereira, A., Amorim, J., Liao, J., (2017). Effects of Pulsed Nd:- YAG Laser Welding Parameters on Penetration and Microstructure Characterization of a DP1000 Steel Butt Joint. Metals 7(8): 292, Doi: 10.3390/met7080292.
[7] Seang, C., David, A.K., Ragneau, E., (2013). Effect of Nd:YAG laser welding parameters on the hardness of lap joint: Experimental and numerical approach. Physics Procedia 41: 38–40, Doi: 10.1016/j. phpro.2013.03.049.
[8] ASTM E8/E8M Standard Test Methods for Tension Testing of Metallic Materials, (2009)

Yayın Aralığı: 4
Başlangıç: 2017
Yayıncı: Ahmet Çalık

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