Ultrasonic Characterization of Porosity in Components Made by Binder Jet Additive Manufacturing

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Evaluation Pub Date : 2022-04-01 DOI:10.32548/2022.me-04266

O. Cook, Nancy Huang, R. Smithson, C. Kube, A. Beese, A. Argüelles

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引用次数: 7

Abstract

Binder jet metallic additive manufacturing (AM) is a popular alternative to powder bed fusion and directed energy deposition because of lower costs, elimination of thermal cycling, and lower energy consumption. However, like other metallic AM processes, binder jetting is prone to defects like porosity, which decreases the adoption of binder-jetted parts. Binder-jetted parts are sometimes infiltrated with a low melting temperature metal to fill pores during sintering; however, the infiltration is impacted by the part geometry and infiltration environment, which can cause infill nonuniformity. Furthermore, using an infiltration metal creates a complicated multiphase microstructure substantially different than common wrought materials and alloys. To bring insight to the binder jet/infiltration process toward part qualification and improved part quality, spatially dependent ultrasonic wave speed and attenuation techniques are being applied to help characterize and map porosity in parts made by binder jet AM. In this paper, measurements are conducted on binder-jetted stainless steel and stainless steel infiltrated with bronze samples. X-ray computed tomography (XCT) is used to provide an assessment of porosity.

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粘结剂喷射增材制造组件孔隙率的超声表征

粘结剂喷射金属增材制造(AM)是粉末床熔融和定向能沉积的一种流行的替代方法，因为成本更低，消除了热循环，能耗更低。然而，与其他金属增材制造工艺一样，粘结剂喷射容易出现气孔等缺陷，从而降低了粘结剂喷射件的采用率。在烧结过程中，粘结剂喷射件有时会渗入低熔点金属以填充气孔;然而，入渗受零件几何形状和入渗环境的影响，会造成充填不均匀性。此外，使用渗透金属会产生复杂的多相微观结构，这与普通的变形材料和合金有很大的不同。为了深入了解粘结剂喷射/渗透过程，以确定零件质量并提高零件质量，应用了空间相关的超声波速度和衰减技术，以帮助表征和绘制粘结剂喷射AM制造的零件的孔隙度。本文对粘结剂喷射不锈钢和青铜浸渍不锈钢试样进行了测试。x射线计算机断层扫描(XCT)用于评估孔隙度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Evaluation 工程技术-材料科学：表征与测试

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.