The effect of silicon on the strengthening and work hardening of aluminum at room temperature

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:563

Article

Zhao, Qinglong¹  Holmedal, Bjorn¹ 

[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

关键词: Aluminum alloys;    Mechanical characterization;    Mechanical properties;    Portevin-Le Chatelier effect;    Solid solution hardening;   

DOI  :  10.1016/j.msea.2012.11.062

来源: Elsevier

【 摘 要 】

Solution hardening of Al-Si alloys at room temperature was investigated by tensile tests of several aluminum alloys containing various amounts of Si in solution but fabricated from the same commercially pure base material. It is found that Si has a weak strengthening effect but a significant impact on the work hardening. The strengthening was found to be very sensitive to water quenching, which enhances the solute strengthening. Despite the low strengthening effect, the Portevin-Le Chatelier effect was clearly observed during the tension of an alloy containing 0.4 at% Si, suggesting the occurrence of dynamic strain ageing due to surprisingly low levels of Si in solid solution. (c) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

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