Your question is a classic question. Yes the 2 wires will repel each other. The classic explanation is that this is the result of the $\vec{v}\times\vec{B}$ Lorentz force. Here $\vec{B}$ is the magnetic field that is produce by the current (Ampere's Law). This force is in opposite direction in the 2 aluminum "wires". Now comes the 64 million \$ question. We have learned that $q\vec{v}\times\vec{B}$ force cannot do any work as this force is perpendicular to $\vec{v}$. The answer is by no means obvious. The work is done by electric forces.
Here follows a note from my former colleague Professor Barton Zwieback at MIT.
Walter
The issue of work by magnetic fields usually comes up.
I have not yet looked at your example in detail, but the
typical resolution is that the magnetic force never does
work but allows other agent to do it.
This is explained in Griffiths’s Intro to Electrodynamics book,
pages 210-211.
There are interesting analogs of this. Suppose you have a frictionless ramp and you push an object horizontally against it. The object will go up. The only force with up component acting on the object is the normal force perpendicular to the ramp. So it would seem that the normal force is pushing the object up. This is true but the normal force does not do work. The work is done by you, pushing horizontally. The normal force helps channel the motion upwards.