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通过旋转摇摆改进Mg-5Al-2Ca-1Mn-0.5Zn合金的机械性能
Bin Li1,2, Hao Chen1,2, Xiangnan Ke1,2
1International Joint Laboratory for Light Alloys (MOE), Chongqing University, Chongqing 400044, China.
Materials (Basel, Switzerland)
|June 28, 2023
概括
这项研究使用热挤出和旋转交换来增强 (Mg) 合金的性能. 经过加工的Mg-5Al-2Ca-1Mn-0.5Zn合金实现了优越的强度和柔性,特别是在其外围区域.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是一种金工业.
- 机械工程 机械工程
背景情况:
- (Mg) 合金对于各种应用越来越重要.
- 对于具有改进机械性能的Mg合金有着持续的需求.
- 稀土元素通常用于增强Mg合金,但非稀土替代品是可取的.
研究的目的:
- 准备一个非RE Mg-5Al-2Ca-1Mn-0.5Zn合金.
- 为了提高这种合金的机械性能,特别是强度和柔性.
- 研究传统热挤出和旋转转换对合金微观结构和性能的影响.
主要方法:
- 制备一个Mg-5Al-2Ca-1Mn-0.5Zn合金.
- 传统的热挤压工艺.
- 随后的旋转交换过程.
- 微结构分析 (粒径大小,位移).
- 机械性能测试 (硬度,屈服强度,最终抗拉强度,延长).
主要成果:
- 旋转换导致中部地区的硬度下降,强度较低但柔性更高.
- 外围区域的机械性能显著改善:屈服强度为352 MPa,最终抗拉强度为386 MPa.
- 周边区域的延长保持在9.6%,表明强度和可塑性的良好平衡.
- 微观结构分析显示,由于旋转交换,谷物精炼和失位密度增加.
- 确定非基底滑动的激活对于在强度增强过程中保持可塑性至关重要.
结论:
- 传统的热挤出和旋转换有效地提高了非RE Mg-5Al-2Ca-1Mn-0.5Zn合金的机械性能.
- 处理方法的结果是性能梯度,在外围区域具有优越的强度-柔性协同作用.
- 谷物精炼,脱位强化和非基底滑坡的激活是提高性能的主要机制.
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