作为造Al-10Ce-3Mg-xZn合金的微观结构和机械性能
Haiyang Zhang1, Mingdong Wu1, Zeyu Li1
1National Key Laboratory of Science and Technology on High-Strength Structural Materials, Central South University, Changsha 410083, China.
Materials (Basel, Switzerland)
|August 29, 2024
概括
将 (Zn) 添加到-- (Al-Ce-Mg) 合金中,可以提高机械性能和耐热性. 添加5%重量Zn显著提高了拉伸强度和微硬度,通过在Al11Ce3强化阶段中形成一个新的Al2CeZn2阶段.
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:
- 合金是重要的工程材料.
- (Ce) 和 (Mg) 的添加可以改善合金的性能.
- 了解 (Zn) 等合金元素的作用是进一步优化的关键.
研究的目的:
- 研究添加对成型Al-10Ce-3Mg合金微观结构和机械性能的影响.
- 分析Al2CeZn2阶段的形成和影响.
- 为了评估开发的合金的高温性能.
主要方法:
- 对成Al-10Ce-3Mg-xZn (x = 0,1,3,5 wt.%) 合金进行系统的研究.
- 微结构分析以观察相位形成和分布.
- 机械性能测试包括微硬度,弹性模量和在室温和高温下抗拉强度.
主要成果:
- 添加 Zn 会在 Al11Ce3 阶段内形成一个类似于针状的 Al2CeZn2 阶段.
- 增加Zn含量增加了Al11Ce3相的体积分数.
- 与没有的合金相比,含有5%重量的合金显示出显著的改进:微硬度增加18.9%,弹性模量增加9.0%,最终拉伸强度提高21% (210MPa),收益强度提高77% (171MPa).
- 5%重量%的合金表现出优异的耐热性,在200-300°C时保持出色的抗拉强度.
结论:
- 添加有效地改进了微观结构,并增强了Al-10Ce-3Mg合金的机械性能.
- Al2CeZn2阶段的形成及其与Al11Ce3阶段的相互作用是改善性质的原因.
- 增强的机械性能归因于第二阶段强化和固溶液强化,使这些合金对高温应用具有前景.
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