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关于合金AA5083在振荡负载下高温拉伸性能的实验研究
Mohammad Shirinzadeh Dastgiri1, Zackary Fuerth2, Leo Kiawi2
1Department of Mechanical, Automotive & Materials Engineering, University of Windsor, Windsor, ON, N9B 1K3, Canada. shirinz@uwindsor.ca.
Scientific reports
|August 16, 2023
概括
在拉伸性测试期间向AA5083合金添加振荡负荷,可以使总延长率增加8-23%并改善厚度均性. 这种增强的变形能力表明金属成型工艺的潜在好处.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 金工业是金工业的一个方面.
背景情况:
- 了解合金的流动行为对于优化制造工艺至关重要.
- 准静态负载条件是评估材料性能的标准.
- 叠加的振荡负荷代表了一种新的方法,可以潜在地提高材料的可塑性.
研究的目的:
- 为了研究叠加的振荡负荷对合金AA5083在450°C的准静态拉力流动行为的作用.
- 量化变形特征的变化,如总延长和厚度分布.
- 探索振荡负荷在提高材料可塑性方面的潜力.
主要方法:
- 在近静态条件下,在450°C的温度下对AA5083进行拉伸测试 (拉伸率为0.0010.3s-1).
- 使用定制固定装置和MTS拉伸测试机,应用叠加的正弦波振荡 (5100 Hz,0.020.5 N振幅).
- 分析沿标尺长度的厚度分布形状.
- 使用LS-DYNA与用户定义的材料子程序进行有限元分析.
主要成果:
- 叠加的振荡并没有显著改变产量或拉伸强度.
- 在振荡负载条件下,总延伸增加了823%.
- 随着振荡的应用,沿标尺长度的厚度分布变得更加均.
结论:
- 叠加的振荡负荷提高了AA5083在断裂前的变形能力.
- 振荡负荷可以推迟损坏的发生,比传统成型提供优势.
- 该研究提供了关于利用振荡负荷来改进合金的金属成型的见解.
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