Design of New Punch Geometries for Generation of Non-Linear Strain Paths and Formability Evaluation

摘要

Aluminum alloys have received considerable interest from the automotive and aeronautical industries as they are now focusing on the design and manufacture of lightweight vehicles with the objective of reducing fuel consumption and emissions. Aluminum sheet for automotive body applications requires high strength accompanied by good formability, corrosion resistance, and weldability. Mostly aluminum alloys of 6xxx and 5xxx series are used in automotive industries for the outer and inner body panels. In recent years, several alloy modifications have been introduced to meet the requirements of car manufacturing. The different types of 6xxx and 5xxx alloys vary not only in the ratio of Mg and Si, but also in the percentage of other elements like Cu, Mn, Fe, etc. The varying amount of elements results in a wide range of mechanical properties. Hence, different alloys have different formability. It is an important requirement for the automotive industry to assess the formability of alloys so that body panels can be successfully formed without failure.