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The mechanisms of anneal hardening in Cu-Al alloys

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Abstract

The anneal hardening behavior of a Cu-16 at. pct. Al alloy was investigated by tensile testing, measurement of Young’s modulus and electrical resistivity, and electron microscopy. It was shown that three main stages of annealing processes can be distinguished. Stage 1 atT ≤ 150°C is characterized by vacancy annihilation and short-range diffusional processes giving rise to three successive, low maxima in yield and tensile strength. Substages in this temperature range are also evident from resistivity measurements. Stage 2 at 150 ≲ 275°C is essentially associated with solute segregation to dislocations giving rise to the main increase in flow stress. In Stage 3 at 725 ≤T ≤ 350°C recrystallization takes place.

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Authors and Affiliations

  1. Fa. Wizemann, D-7000, Stuttgart-Bad Cannstatt, Germany

    M. Bader (Materials Development Engineer)

  2. Climax Molybdenum Co. of Michigan, Ann Arbor, Mich.

    G. T. Eldis (Senior Research Associate)

  3. Swiss Aluminium Ltd., CH-8212, Neuhausen, Switzerland

    H. Warlimont (Head of Metals Research Department)

Authors
  1. M. Bader
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  2. G. T. Eldis
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  3. H. Warlimont
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Bader, M., Eldis, G.T. & Warlimont, H. The mechanisms of anneal hardening in Cu-Al alloys. Metall Trans A 7, 249–255 (1976). https://doi.org/10.1007/BF02644464

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  • DOI: https://doi.org/10.1007/BF02644464

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