| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
Effects of Electric Current on the Plastic Deformation Behavior of Pure Copper, Iron, and Titanium |
| Author(s) |
Christopher Rudolf |
| On-Site Speaker (Planned) |
Christopher Rudolf |
| Abstract Scope |
Application of an electric current through a metal has been shown to reduce the deformation energy and increase a materials formability leading to the possibility of increases in achievable shape complexity. The primary challenge in characterizing electrical current effects on plastic deformation is addressed using independent electro- and thermo- mechanical testing systems to decouple the intrinsic Joule heating. Uniaxial tension tests were performed on copper, iron, and titanium specimens with various applied constant (dc) current levels and at matching temperatures. The results showed non-thermal current effects only with the titanium; 20% reduction in ultimate strength with respect to the strength from the matching temperature tests was observed as well as significant inhomogeneous grain growth. Dislocation scattering by thermal phonons and electrons associated with the radial and axial heat fluxes generated in the titanium tensile specimens with bulk Joule heating is suggested as a potential mechanism for the observed EAD effects. |