Friction-stir welding of AA 2198 butt joints: mechanical characterization of the process and of the welds through DOE analysis
| Autor: | Umberto Prisco, C. Bitondo, Antonino Squilace, Pasquale Buonadonna, Gennaro Dionoro |
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| Přispěvatelé: | Bitondo, Ciro, Prisco, Umberto, Squillace, Antonino, P., Buonadonna, G., Dionoro |
| Rok vydání: | 2010 |
| Předmět: |
Engineering
Yield (engineering) Rotational speed Friction-stir welding (FSW) Welding Industrial and Manufacturing Engineering Forging Tensile strength law.invention law desirability function (DF) approach Ultimate tensile strength Aluminium alloy Friction stir welding Welding speed FSW force Design of experiment business.industry Mechanical Engineering Structural engineering Computer Science Applications Control and Systems Engineering visual_art visual_art.visual_art_medium Butt joint AA 2198 business Software |
| Zdroj: | The International Journal of Advanced Manufacturing Technology. 53:505-516 |
| ISSN: | 1433-3015 0268-3768 |
| Popis: | In this study, rolled plates of AA 2198 T3 aluminium alloy are friction-stir welded in butt configuration varying two fundamental process parameters: rotational and welding speeds. Two sets of empirical models based on regression analysis are developed. The first one predicts the stationary values of the in-plane and downwards forging welding forces in dependence of the process parameters under investigation. The second one predicts the mechanical strength, in particular yield and tensile strength, of the friction-stir welded joints as function of the same parameters. For the development of the empirical models, two 32 full factorial designs are used: one having the stationary values of the welding forces and the other having the yield and tensile strength as observed responses, respectively. Statistical tools such as analysis of variance, F tests, Mallows’ C P , coefficient of determination etc. are used to build and to validate the developed models. By using the desirability function approach, the optimum process parameters to simultaneously obtain maximum possible yield and tensile strength are found within the investigated range. The developed models can be effectively used to predict the stationary forces and the mechanical proprieties of the joints at 95% confidence level. |
| Databáze: | OpenAIRE |
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