Details

Autor(en) / Beteiligte

• DAVIES, R. W
• SMITH, M. T
• OLIVER, H. E
• KHALEEL, M. A
• PITMAN, S. G

Titel

Weld metal ductility in aluminum tailor welded blanks

Ist Teil von

• Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2000-11, Vol.31 (11), p.2755-2763

Ort / Verlag

New York, NY: Springer

Erscheinungsjahr

2000

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The objective of the research described in this article was to characterize and numerically describe the ductility of weld material in aluminum tailor welded blanks under uniaixial tension conditions. Aluminum tailor welded blanks consist of multiple thickness and alloy sheet materials welded together into a single, variable thickness blank. To evaluate the mechanical properties of the weld material in these tailor welded blanks, a series of tensile specimens containing varying ratios of weld and monolithic material in the gage area of the specimen were tested. These experimental results show that increasing the amount of weld in the cross-sectional area of the specimen decreases the ductility of the speicmen and that the weld characteristics have a pronounced impact on ductility. Using the experimental results an classical tensile instability and necking models, a numerial model was developed to describe the ductility of the weld metal. The model involves basic material properties and an initial imperfection level in both the weld and monolithic materials. The specimens studied were produced from 1- to 2-mm AA5182-O Al alloy sheet material welded into blanks using an autogeneous gas tungsten arc welding process.