TY  - JOUR
T1  - Effect of Laser Power on Mechanical and Microstructure Properties of Pulsed Nd:YAG Laser Welded Dissimilar DP600-DP1000 Steel Sheets
AU  - Tunçel, Oğuz
AU  - Aydın, Hakan
AU  - Çetin, Şükriye
PY  - 2020
DA  - March
Y2  - 2019
DO  - 10.26701/ems.632173
JF  - European Mechanical Science
JO  - EMS
PB  - Ahmet ÇALIK
WT  - DergiPark
SN  - 2587-1110
SP  - 41
EP  - 46
VL  - 4
IS  - 1
LA  - en
AB  - In the present study, dissimilar dual-phase(DP) steel sheets (DP600-DP1000) were double-sided welded with Nd:YAG(Neodymium-doped Yttrium Aluminum Garnet (Y3Al5O12)) laser device and theeffect of laser power on mechanical and microstructural properties of weldedsheets was investigated. Laser welds were conducted using SISMA SWA300 Nd:YAGlaser welding machine in the flat position with the butt joint. DP600 andDP1000 steels with a 1 mm thickness were selected for the experiments. Laserpower was changed from 20% to 75%, and other welding parameters were keptconstant. To evaluate the welded samples, tensile, microhardness and opticalmicroscope tests were performed. As a result of the study, in high laser powervalues, good quality welds were obtained. In microstructural studies, it wasobserved that three different regions were formed in the weld section; fusionzone (FZ), heat affected zone (HAZ) and base material (BM). These three regionswere composed of different phase structures; FZ: martensite, bainite andretained austenite, HAZ: martensite, bainite, ferrite, retained austenite andtempered martensite, BM: ferrite and martensite. Also, different hardnessvalues were measured in these different regions, particularly in the FZ highestmicrohardness values were measured due to effective martensite formation.
KW  - Pulsed Nd:YAG laser welding
KW  - DP600 steel
KW  - DP1000 steel
KW  - Laser power
KW  - Mechanical properties
KW  - Microstructure
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UR  - https://doi.org/10.26701/ems.632173
L1  - https://dergipark.org.tr/en/download/article-file/957628
ER  -