In accordance with the above analysis and the evaluation of the test results in the performed tests, it can be concluded that: The diameter and the depth of indentation of the spot weld have a behavior directly proportionate to the increasing of heat Input (Current (A) and Time (Cycles)). Resistance to shear tension (kg/mm(exp2)) at the welding point has a reaction directly proportionate to the increase of entrance heat (Current A and Time Cycles). However it can be observed that at high levels of heat Input (Tests T7 4693 KJ, T8 5616 KJ, and T9 7488 KJ) this increase is minimal. In comparison with high levels of hardness in the Metal base and weld (301-420 HV), low levels of hardness were observed (250-282 HV) in the ZAC. The micro structural analysis shows the presence of soft phases (Ferrite) in the ZAC which reduces its hardness in this area due to the effects of the Heat Input. The neural network model for correlate the process parameters for RSW welding processes on the join characteristics has been developed and the model give us an information about the relationship of independent and dependent variables, also the model can be used to calculate the welding process parameters to obtain an specific welding quality characteristic.
Weldability of advanced high strength steels (AHSS) martensitic type by resistance spot welding (RSW) an optimization model to the automotive industry components
Schweißbarkeit von modernen hochfesten Stählen vom Martensittyp durch Widerstandspunktschweißen - ein Optimierungsmodell für die Herstellung von Kraftfahrzeugbauteilen
2009
9 Seiten, 11 Bilder, 2 Tabellen, 12 Quellen
Conference paper
English
Friction Stir Spot Welding (FSSW) of Advanced High Strength Steel (AHSS)
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