微合金稀土 Nd 对微结构演变和 Cu 合金机械性质的影响
Mingyi Zhang1,2,3, Jichun Yang1,2, Chongyuan Huang4,5
1School of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou 014010, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
将稀土 (Nd) 添加到铜 (Cu) 合金中,可显著提高机械性能. 这项研究表明,改性合金克服了强度-柔性权衡,提高了强度和延伸度,以获得更好的内性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 机械工程 机械工程
背景情况:
- 由于密度,可塑性和导热性,铜 (Cu) 合金对于内至关重要.
- 提高基于Cu的层的机械性能对于喷气的稳定性和透性至关重要.
- 金属中的强度-柔性权衡对提高合金性能提出了重大挑战.
研究的目的:
- 为了研究稀土 (Nd) 改性Cu合金的微观结构演变.
- 为了确定 Nd 修改对 Cu 合金机械性能的影响.
- 探索克服基于Cu的材料的强度-柔性权衡的方法.
主要方法:
- 光学显微镜 (OM) 的使用
- 扫描电子显微镜 (SEM) 的使用
- 电子反射衍射 (EBSD) 是一种电子反射衍射技术.
- 传输电子显微镜 (TEM) 的应用
- 拉力测试 拉力测试 拉力测试
主要成果:
- 没有Nd的Cu合金表现出最低的抗拉强度 (218MPa) 和延长率 (50.7%).
- 增加的含量逐渐提高了拉伸强度和延长.
- 样本4 (最高的含量) 显示出最佳性能:拉伸强度278.6MPa,延伸率65.2%.
- 此外,精制的粒度大小和改善的微观结构异质性,增强强度和可塑性.
结论:
- 稀土 Nd 改造有效地改善了 Cu 合金的机械性能.
- 添加成功地减轻了强度-柔性权衡,从而带来了卓越的性能.
- 增强的强度归因于谷物精炼,分散强化和应变硬化,而柔性与微观结构异质性改善有关.
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