Effects of process interruptions on microstructure and mechanical properties of three face centered cubic alloys processed by laser powder bed fusion

Terrazas-Najera C. A.; Mayoral F. L.; Garcia O. F.; Hossain M. S.; Espalin D.; Fernandez A.; Murr L. E.; Wicker R. B.

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Effects of process interruptions on microstructure and mechanical properties of three face centered cubic alloys processed by laser powder bed fusion

机译：过程中断对激光粉末融合加工三个面中心立方合金微观结构和力学性能的影响

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Many factors can influence the thermal history during laser powder bed fusion (L-PBF) that contribute to the microstructure and mechanical performance of produced components. These factors can include process parameters, geometry, feedstock characteristics, and more. In this work, we report on the effect that process interruptions have on the thermal history during L-PBF fabrication of simple geometries made out of three alloys of interest: AlSi10Mg, Inconel 718 and Inconel 625. Systematic experiments were carried out with programmed process interruptions lasting one hour and simulating a stop to refill the system with powder, or an unexpected power outage. Specimens produced through these experiments enabled studying microstructural differences using microscopy techniques, and the evaluation of tensile and hardness properties when compared to uninterrupted controls. The findings from this study indicate that there were no distinguishable microstructural differences from interrupted specimens and uninterrupted controls for all three materials. Also, although Inconel 718 interrupted specimens showed a slight reduction in ultimate tensile strength and elongation, these properties remained essentially unchanged for AlSi10Mg and Inconel 625. Although a more comprehensive study is still required that accounts for the effect of thermal post-processing and other factors, the results described here provide several observations of the potential effects of process interruptions, and the implications towards process validation and quality assurance of L-PBF.

机译：许多因素可以影响激光粉末融合期间的热历史（L-PBF），这有助于产生组件的微观结构和机械性能。这些因素可以包括工艺参数，几何形状，原料特性等等。在这项工作中，我们报告了在L-PBF制造过程中，在L-PBF制造中，在一个感兴趣的三种合金中制造的L-PBF制造过程中的效果：Alsi10mg，Inconel 718和Inconel 625.进行了系统的过程中断进行了系统实验持续一小时并模拟停止以用粉末重新填充系统，或意外的停电。通过这些实验产生的标本使能使用显微镜技术进行微观结构差异，与不间断的对照相比，在与不间断的对照相比时的抗拉和硬度性能的评价。本研究的发现表明，对于所有三种材料，没有与中断标本和不间断的对照的可区分微观结构差异。此外，尽管Inconel 718中断标本表现出极致的拉伸强度和伸长率略微降低，但对于Alsi10mg和Inconel 625，这些性质基本不变。虽然仍然需要更全面的研究，但占热后处理和其他因素的影响。，这里描述的结果提供了几种对过程中断的潜在影响的观察，以及对L-PBF的过程验证和质量保证的影响。

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来源
《Journal of Manufacturing Processes》 |2021年第6期|397-406|共10页
作者
Terrazas-Najera C. A.; Mayoral F. L.; Garcia O. F.; Hossain M. S.; Espalin D.; Fernandez A.; Murr L. E.; Wicker R. B.;
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Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Met Mat & Biomed Engn El Paso TX 79968 USA;

Univ Texas El Paso WM Keck Ctr 3D Innovat El Paso TX 79968 USA|Univ Texas El Paso Dept Mech Engn El Paso TX 79968 USA;

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正文语种 eng
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Process interruption; Laser powder bed fusion (LPBF); Additive manufacturing (AM); AlSi10Mg; Inconel 718; Inconel 625;

机译：过程中断;激光粉床融合（LPBF）;添加剂制造（AM）;Alsi10mg;Inconel 718;Inconel 625;

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1. Microstructure and mechanical properties of a TiB_2-modified Al-Cu alloy processed by laser powder-bed fusion [J] . P. Mair, L. Kaserera, J. Braun, Materials Science and Engineering . 2021,第Jana2期

机译：激光粉床融合加工的Tib_2改性Al-Cu合金的微观结构和力学性能
2. Microstructures and mechanical properties of aluminum-transition metal binary alloys (Al-Fe, Al-Mn, and Al-Cr) processed by laser powder bed fusion [J] . Kimura Takahiro, Nakamoto Takayuki, Ozaki Tomoatsu, Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2021,第1期

机译：激光粉床融合加工铝 - 过渡金属二元合金（Al-Fe，Al-Mn和Al-Cr）的微观结构和力学性能
3. Effect of heat treatment and hot isostatic pressing on the microstructure and mechanical properties of Inconel 625 alloy processed by laser powder bed fusion [J] . Alena Kreitcberg, Vladimir Brailovski, Sylvain Turenne Materials Science and Engineering . 2017,第Mara24期

机译：热处理和热等静压对激光粉末床熔合Inconel 625合金组织和力学性能的影响
4. Effects of process interruptions on the microstructure and tensile properties of AlSi10Mg parts manufactured by Laser-Based Powder Bed Fusion [C] . Maximilian Binder, Cheechau Leong, Christine Anstaett, International Conference on Photonic Technologies . 2020

机译：过程中断对基于激光基粉覆盖件制造的Alsi10mg部件微观结构和拉伸性能的影响
5. Investigation on Microstructure and Mechanical Properties of Porous Structures Processed by Laser Powder Bed Fusion [D] . Ramachandra, Samarth. 2021

机译：激光粉床融合处理多孔结构微观结构和力学性能研究
6. Hierarchical Microstructure of Laser Powder Bed Fusion Produced Face-Centered-Cubic-Structured Equiatomic CrFeNiMn Multicomponent Alloy [O] . Xuan Yang, Yanling Ge, Joonas Lehtonen, 2020

机译：激光粉末融合的分层微观结构产生的面向中心立式阶段Crfenimn多组分合金
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机译：工艺参数对激光沉积pm合金690N {sub 2}粉末组织和性能的影响

Effects of process interruptions on microstructure and mechanical properties of three face centered cubic alloys processed by laser powder bed fusion

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