Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Hardness vs Brittleness Aluminum

  1. Apr 27, 2007 #1
    I'm wondering if anyone is willing to share some comparison numbers between any aluminum's hardness value and its impact resistance value.

    A friend and I are disagreeing on something, I think the harder the treatment is, the more brittle it becomes. He doesn't think so.
  2. jcsd
  3. May 5, 2007 #2


    User Avatar

    I don't have any kind of numbers, facts or figures on me, but I am a material engineer. Generally, whenever a material is hardened, it becomes more brittle in a sense. It doesn't mean that it becomes brittle, but the material loses its ductility. That is the reason for say annealing. It keeps the hardness levels, but it returns the materials ductility.

    Hope that helps a little.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook