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Lecture

Electro-plastic deformation studies of Al-Cu eutectic alloys

Thursday (27.09.2018)
10:15 - 10:30 S1/03 - 283
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A new approach of forming materials with poor deformability, such as metallic‐intermetallic composite materials, is to apply electric current pulses during deformation. This effect is commonly known as the electro‐plastic effect (EPE). The EPE causes lowering of the yield strength and enhances the elongation to fracture. However, the underlying physical mechanisms of the electro‐plastic effect are not fully understood yet. Since the EPE has only been studied on the macroscopic scale until now, we have designed a new experimental set‐up to perform in‐situ electro‐nanomechanical deformation experiments such as electro‐plastic nanoindentation and micro‐pillar compression experiments. This enables us to study the effects of electrical pulses during plastic deformation of single‐phase and single‐crystalline samples of even complex microstructures, hence, providing more detailed insights into the physical nature of the electro‐plastic effect. Additionally, high current densities can be achieved due to the small tested sample volumes. Here, we present our experimental set‐up and report about first experimental results of a nano‐mechanical electro‐plastic study on an Al‐Cu eutectic alloy.

Speaker:
Doreen Andre
RWTH Aachen University
Additional Authors:
  • Matthias Obot
    RWTH Aachen University
  • Dr. Stefanie Sandlöbes
    RWTH Aachen University
  • Prof. Dr. Sandra Korte-Kerzel
    RWTH Aachen University