使用超声波技术评估微观结构和多孔性对增材制造材料弹性异构性的影响
Daniel Herburger1, Jin-Yeon Kim2, Nicholas Lark2
1School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
The Journal of the Acoustical Society of America
|March 24, 2025
概括
超声波测试可以评估3D打印钢的弹性特性和缺陷,提高材料合格. 这种方法有助于量化在增材制造设计中假设统一的材料特性所产生的错误.
科学领域:
- 材料科学与工程 材料科学与工程
- 非破坏性测试 不破坏性测试
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 增材制造 (AM) 面临的资格挑战是由于工艺缺陷,如缺乏融合多孔性.
- 在AM材料的异型弹性特性限制设计和分析的准确性.
- 标准的合格方法往往忽视了AM部件的复杂的异构性行为.
研究的目的:
- 展示超声波测量技术,用于评估3D打印材料的弹性特性和缺陷.
- 为了评估工艺参数和热处理对316L不钢激光粉末床融合 (LPBF) 弹性异性质的影响.
- 量化缺陷和微观结构特征对弹性异构的贡献.
主要方法:
- 超声波速度测量被用来描述弹性异构性.
- 进行了微结构分析和孔隙度测量,以与超声波数据相关联.
- 热处理 (HTs) 用于隔离缺陷和微观结构对异性质的影响.
主要成果:
- 超声波速度测量有效评估了LPBF 316L钢的弹性异构性和工艺缺陷.
- 工艺参数和HT的变化显著影响了弹性特性和异构性.
- 该研究量化了设计分析中的错误,这些错误源于同otropic或横向同otropic假设.
结论:
- 超声波技术显示出监测和合格增材制造材料的巨大潜力.
- 了解和量化弹性异构性对于准确设计和分析AM部件至关重要.
- 这项研究为改善AM中缺陷检测和材料表征提供了途径.
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