Aging behaviors of the Al–Cu alloy via ultrasound-promoted thermal treatments

材料科学 合金 维氏硬度试验 超声波 延伸率 冶金 复合材料 极限抗拉强度 微观结构 医学 放射科
作者
Wan–Ting Chiu,Tadashi Akama,Masaki Tahara,Tomonari Inamura,Kentaro Nakamura,Hideki Hosoda
出处
期刊:Journal of materials research and technology [Elsevier]
卷期号:28: 478-489 被引量:3
标识
DOI:10.1016/j.jmrt.2023.11.253
摘要

Aging treatments have been widely utilized for enhancing the mechanical properties of many materials, such as Al–Cu alloys. In conventional aging treatments, there is a trade-off between the aging conditions (e.g., aging times and temperatures) and the mechanical properties (e.g., hardness and strength). There is usually compensation in the aging treatments, such as deteriorated hardness of the alloys, when tuning the aging conditions. The ultrasound-promoted aging treatments were conducted in this study to solve the aforementioned conventional difficulties since it is believed that the ultrasound could accelerate the diffusion of the atoms and thus shorten the aging time while keeping the aging temperature low. The Al-4 wt.% Cu alloys were utilized for the verification of the influence of the ultrasound on the mechanical properties of the alloys since the Al-4 wt.% Cu alloys have been widely studied. It was found that with the promotion of the ultrasound, the Vickers hardness of the alloys could be enhanced. On the other hand, the alternations of strength and elongation by applying an ultrasound were limited. It is therefore concluded that the ultrasound could have certain positive effects on the enhancement of the alloy properties, such as Vickers hardness.
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