基于毛孔缺陷结构的增材制造材料的快速合格方法
Krzysztof S Stopka1, Andrew Desrosiers2, Amber Andreaco2
1School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907 USA.
概括
本研究引入了增材制造 (AM) 疲劳部件的快速合格方法,通过控制缺陷并将测试与模拟相结合. 这种方法加速了材料合格,并减少了对AM元件的实验需求.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造业 工程 制造工程
背景情况:
- 增材制造 (AM) 整合了材料形成和零件成型,比传统方法提供了优势.
- 在疲劳关键应用中,AM的广泛采用受到诸如毛孔性等缺陷的限制,这些缺陷受到工艺参数和零件几何学的影响.
- 由于工艺变化和局部微观结构缺陷,对疲劳性能进行合格的AM材料是复杂的.
研究的目的:
- 提出一种新的方法,用于AM疲劳有限部件的快速合格.
- 为应对疲劳敏感应用的AM材料的表征和认证所面临的挑战.
- 通过结合实验和模拟策略,减少对AM材料合格所需的测试数量.
主要方法:
- 对孔隙缺陷 (大小,分布,形态) 的控制播种到AM标本中.
- 非破坏性和破坏性测试的整合,用于材料表征和疲劳性能评估.
- 基于微观结构的模拟,以根据特定的缺陷和微观结构组合预测疲劳行为.
主要成果:
- 拟议的方法有助于生成模拟疲劳数据以验证和增强实验结果.
- 证明了一条加速AM材料用于疲劳应用的资格化的途径.
- 突出了材料合格和零件认证过程之间更紧密的整合的潜力.
结论:
- 开发的方法允许更快,更高效的AM材料的资格,特别是对于疲劳有限的应用.
- 将实验数据与模拟驱动的见解相结合,可以显著减少测试要求.
- 统一的材料资格和零件认证方法对于强大的AM部署至关重要.
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