在FRAM-6061Al合金环组件中使用CEL模拟进行材料流和缺陷形成的数值调查
1Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
摩擦接增材制造 (FRAM) 成功生产了合金环,克服了融方法的缺陷. 这项研究使用先进的模拟和实验揭示了FRAM环中的独特的微结构演变和残余应力.
科学领域:
- 材料科学与工程 材料科学与工程
- 添加剂制造 添加剂制造 添加剂制造
- 计算材料科学科学 计算材料科学
背景情况:
- 摩擦滚动增材制造 (FRAM) 是一种用于制造组件的新型固态技术.
- 现有的FRAM研究主要集中在平面组件上,而没有研究过环形组件.
- 环组件在微观结构进化和由于几何约束而导致缺陷形成方面存在独特的挑战.
研究的目的:
- 研究FRAM制造的合金环组件中的微结构演变和残余应力.
- 为了阐明成形行为和材料流动特征在几何约束下在FRAM的环.
- 建立一个可靠的数值模拟方法来分析环部件的FRAM过程.
主要方法:
- 采用合欧利尔-拉格兰 (CEL) 方法进行温度和残余应力的数值模拟.
- 在模拟中利用痕迹粒子来分析材料流动行为.
- 使用扫描电子显微镜 (SEM) 和电子反射散射衍射 (EBSD) 进行实验性表征.
主要成果:
- CEL模拟准确预测了温度分布和残余应力,显示外部直径的温度更高,内部直径的残余应力增加.
- 粒子分析显示,由于环形几何学,在半径区域之间存在明显的物质流和微观结构变化.
- EBSD分析表明,一个优选的结晶学方向 ({111}平面与剪切方向平行),然后是动态再结晶成一个等轴的粒度结构.
结论:
- 该研究成功地描述了FRAM制造的合金环的独特形成行为和微观结构演变.
- 结合的欧利尔-拉格兰 (CEL) 方法在模拟环组件中复杂的温度和应力分布方面被证明是有效的.
- 结果为应用FRAM在制造大型环形元件提供了理论基础和实际指导.
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