Reducing fuel consumption has been a driving factor for researchers and manufacturers to continually develop improved methods for reducing the weight of automobiles or lightweighting. These vehicle lightweighting demands have directed researchers to look to using materials that are typically more difficult to manufacture in their studies. As a result, friction stir processing techniques are being looked at more closely. There are advantages to using friction stir methods. Dissimilar metals can be welded and fine-grained products can be created using friction stir methods to name a few.This paper provides preliminary results and insights gained when fine metal powders were used in a friction stir back extrusion (FSBE) setup. The tooling consisted of an aluminum die with an M13 rotating probe mounted in a CNC mill. Within the die, commercially pure aluminum powder was topped by a solid aluminum cap with a solid aluminum cylinder with a depression in order to locate the probe in the center of the tool. The cylinder was used as a sacrificial cap for compacting the powdered aluminum. X-ray defraction indicated that Al13Fe4 was formed, indicating that the temperature within the die reached 800°C and the potential for the powder to have sintered and melted.

Integrating Friction-Stir Back Extrusion to Powder Metallurgy

Paper Proceedings: https://asmedigitalcollection.asme.org/MSEC/MSEC2021/volume/85062

2021 International Manufacturing Science and Engineering Conference (MSEC2021)

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