Anomaly detection by X-ray tomography and probabilistic fatigue assessment of aluminum brackets manufactured by PBF-LB

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials & Design Pub Date : 2024-11-19 DOI:10.1016/j.matdes.2024.113467

L. Rusnati , M. Yosifov , S. Senck , R. Hubmann , S. Beretta

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Abstract

The assessment of safety-critical components for fatigue applications is a key requirement for metal additive manufacturing (AM) applications. Material anomalies play a relevant role in determining the fatigue resistance properties of a component. X-ray computed tomography (CT) helps collect important information on these flaws, such as their size and position within a part.

In this study, we discuss how to employ anomaly data detected on an AlSi10Mg bracket manufactured by laser-powder bed fusion to describe the prospective allowable life of a component under a given operating condition.

A statistical analysis was conducted on the specimens and component to derive the correlation between different resolution scans and analyze the uncertainties of the micro-CT measurements. The full-scale non-destructive evaluation (NDE) can be constrained to large voxel sizes. Eventually, the authors proposed a fully probabilistic route for assessment instead of a simple deterministic assessment based on safety factors. This assessment enables designers to consider the uncertainties of the assessment (uncertainties of micro-CT detection and the model for fatigue strength).

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通过 X 射线断层扫描和概率疲劳评估对 PBF-LB 制造的铝支架进行异常检测

对安全关键部件进行疲劳应用评估是金属增材制造（AM）应用的一项关键要求。材料异常在确定部件的抗疲劳性能方面发挥着重要作用。在本研究中，我们讨论了如何利用激光粉末床融合技术制造的 AlSi10Mg 支架上检测到的异常数据来描述给定工作条件下部件的预期允许寿命。我们对试样和部件进行了统计分析，以得出不同分辨率扫描之间的相关性，并分析微型 CT 测量的不确定性。全尺寸无损评价（NDE）可能受限于较大的体素尺寸。最终，作者提出了一种完全概率化的评估方法，而不是基于安全系数的简单确定性评估。这种评估方法使设计人员能够考虑评估的不确定性（微型 CT 检测和疲劳强度模型的不确定性）。

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.