Characterization of dissimilar friction stir welded lap joints of AA5083 and GL D36 steel
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In: Journal of Materials Research and Technology, Vol. 9, No. 6, 01.11.2020, p. 15132-15142.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Characterization of dissimilar friction stir welded lap joints of AA5083 and GL D36 steel
AU - Batistao, Bruna Fernanda
AU - Bergmann, Luciano
AU - Gargarella, Piter
AU - de Alcantara, Nelson Guedes
AU - dos Santos, Jorge Fernandez
AU - Klusemann, Benjamin
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Dissimilar AA5083 to GL D36 steel welds produced by Friction Stir Welding in lap joint configuration, with the aluminum plate placed on the advancing side, are studied regarding their mechanical, microstructural and interfacial properties for varying process parameters, i.e. welding and tool rotational speed. An increase of welding speed or decrease of the rotational speed causes the formation of tunnel defects, a decrease of the steel hook height and reduction of grain size in the aluminum stir zone. The maximum hardness is observed at the weld interface, due to the presence of intermetallic compound layers, identified as the Fe-rich phases as FeAl and Fe3Al. As the rotational speed increases, an increase of the IMCs thickness in the weld interface is found, which contributes to the degradation of the lap shear strength, due to the brittleness and high hardness of these phases. Overall, the maximum lap shear strength is obtained for welds showing macro (steel hook) and micro interlocks, as well as the formation of thin IMC layers at the weld interface.
AB - Dissimilar AA5083 to GL D36 steel welds produced by Friction Stir Welding in lap joint configuration, with the aluminum plate placed on the advancing side, are studied regarding their mechanical, microstructural and interfacial properties for varying process parameters, i.e. welding and tool rotational speed. An increase of welding speed or decrease of the rotational speed causes the formation of tunnel defects, a decrease of the steel hook height and reduction of grain size in the aluminum stir zone. The maximum hardness is observed at the weld interface, due to the presence of intermetallic compound layers, identified as the Fe-rich phases as FeAl and Fe3Al. As the rotational speed increases, an increase of the IMCs thickness in the weld interface is found, which contributes to the degradation of the lap shear strength, due to the brittleness and high hardness of these phases. Overall, the maximum lap shear strength is obtained for welds showing macro (steel hook) and micro interlocks, as well as the formation of thin IMC layers at the weld interface.
KW - Engineering
KW - aluminium alloys
KW - Steel
KW - Friction stir welding
KW - steel hook
KW - intermetallic compounds
UR - http://www.scopus.com/inward/record.url?scp=85109368987&partnerID=8YFLogxK
U2 - 10.1016/j.jmrt.2020.10.078
DO - 10.1016/j.jmrt.2020.10.078
M3 - Journal articles
VL - 9
SP - 15132
EP - 15142
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
SN - 2238-7854
IS - 6
ER -