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3 thoughts on “1966 Colt XM16E1 Reweld”

  1. It started off pulling my heartstrings. I think I climaxed a little bit too, yep I’m pretty sure of it. I have tears of joy. Thank you for posting this.

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  2. Um…. yea, about that.

    Welding on 7075 aluminum seems like it went well… until you put some real stress on it. Then you start to learn about “phase segregation” and micro-cracking as a result – much like the precipitation hardening zones on either side of a weld in cast iron.

    This is why welding companies do not supply an aluminum filler metal for 7075.

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