Hardness vs Brittleness Aluminum

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    Aluminum Hardness
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SUMMARY

The discussion centers on the relationship between hardness and brittleness in aluminum alloys. A material engineer asserts that increased hardness typically leads to reduced ductility, making the material more brittle. This phenomenon is supported by the practice of annealing, which restores ductility while maintaining hardness levels. Specific numerical comparisons between hardness and impact resistance values were not provided, but the consensus emphasizes the trade-off between these properties in aluminum treatments.

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  • Understanding of material properties, specifically hardness and ductility
  • Familiarity with aluminum alloy treatments, including annealing
  • Basic knowledge of material engineering principles
  • Awareness of impact resistance testing methods
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Material engineers, metallurgists, and students studying materials science who are interested in the mechanical properties of aluminum and its treatments.

snowJT
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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.
 
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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.
 

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