Topic
Spot welding
About: Spot welding is a research topic. Over the lifetime, 12491 publications have been published within this topic receiving 89845 citations. The topic is also known as: Spot_welding.
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TL;DR: In this article, the effect of processing parameters on static strength and fracture mechanisms of dissimilar friction stir spot welds between different aluminium alloys was studied, and the dependence of static strength on processing parameters and the occurrence of different fracture modes were discussed.
Abstract: The effect of processing parameters on static strength and fracture mechanisms of dissimilar friction stir spot welds between different aluminium alloys was studied. Tensile shear strength increased with decreasing tool rotational speed and increasing tool holding time, while cross tension strength decreased with increasing both parameters. Two fracture modes were observed: nugget shear fracture and mixed mode fracture under tensile shear loading, and debonding and pull-out of the nugget under cross tension loading. Based on experimental observation, the dependence of static strength on processing parameters and the occurrence of different fracture modes were discussed.
89 citations
TL;DR: In this paper, a three-dimensional heat and mass transfer model is used to simulate the welding process, based on the solution of the equations of mass, momentum, energy conservation and solute transport in weld pool.
89 citations
Journal Article•
TL;DR: Weld fracture was investigated in relation to weld parameters and steel sheet characteristics in this paper, and the results showed that the weld fracture is independent of the weld parameters of the steel sheet.
Abstract: Weld fracture was investigated in relation to weld parameters and steel sheet characteristics.
88 citations
TL;DR: In this article, material flow during friction stir spot welding is investigated and two distinct zones of material flow are produced: an inner flow zone close to the pin periphery where upper sheet material mo...
Abstract: Material flow during friction stir spot welding is investigated. An examination of dissimilar Al 5754/Al 6111 spot welds was conducted to allow visualisation of material flow based on their differing etching characteristics. In addition, Al 6061–T6 spot welds containing Al2O3 tracer particles were examined to highlight the movement of material in different joint regions. It has been confirmed that upper sheet material is moved downwards into the lower sheet when a layer of upper sheet material is pushed ahead at the tip of the rotating pin, when upper sheet material becomes trapped at the root of the pin thread, and when an adhering layer of upper sheet material forms at the pin periphery during spot welding using a smooth pin. Lower sheet material is displaced upwards and outwards in a spiral motion when the rotating pin forms the keyhole. Two distinct zones of material flow are produced during friction stir spot welding: an inner flow zone close to the pin periphery where upper sheet material mo...
88 citations
TL;DR: In this article, different lap joints of 1060 aluminum and T2 copper were obtained by friction stir spot welding (FSSW) at various rotational speeds and measured process variables during welding revealed that an increasing rotational speed leads to a higher peak temperature but a lower torque and plunging force due to the greater softening degree of material.
88 citations