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arXiv 2103.02039physics.app-phcond-mat.mtrl-sci
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用于高通量微观结构和压痕表征的laser粉末床熔融组合样品的演示

Demonstration of a laser powder bed fusion combinatorial sample for high-throughput microstructure and indentation characterization

Jordan S. Weaver, Adam L. Pintar, Carlos Beauchamp, Howie Joress, Kil-Won Moon, Thien Q. Phan

备注：
44 pages, 13 figures, 4 tables (not including the supplemental material) submitted to Materials & Design
发表信息：
Materials & Design 209 2021 109969
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摘要：

使用具有快速测量的组合样品的高通量实验可以用于以减少的时间、成本和努力提供过程-结构-性质信息。开发这些工具和方法对于增材制造至关重要，因为随着原料材料、增材机器和后处理的进步，增材制造经常需要新的工艺-结构-性能信息。在这里，我们展示了商业激光粉末床熔融系统上生产的组合样品的设计和使用，以研究镍高温合金625的60种不同工艺条件：三种不同条件下的五种激光功率和四种激光扫描速度。组合样品进行了表征，使用光学和电子显微镜，X射线衍射，和压痕，以估计的孔隙率，晶粒尺寸，晶体结构，第二相沉淀，和硬度。压痕和孔隙率结果与常规样品进行了比较。组合样品中的较小尺寸区域（3 mm X 4 mm）与具有类似孔隙率（<0.03%）的较大常规样品（20 mm X 20 mm）相比具有较低的硬度。尽管存在这种差异，但组合样品的晶粒尺寸、晶体结构和孔隙率与激光功率和扫描速度的关系以及硬度与应力消除条件的关系仍存在有意义的趋势。

英文摘要：

High-throughput experiments that use combinatorial samples with rapid measurements can be used to provide process-structure-property information at reduced time, cost, and effort. Developing these tools and methods is essential in additive manufacturing where new process-structure-property information is required on a frequent basis as advances are made in feedstock materials, additive machines, and post-processing. Here we demonstrate the design and use of combinatorial samples produced on a commercial laser powder bed fusion system to study 60 distinct process conditions of nickel superalloy 625: five laser powers and four laser scan speeds in three different conditions. Combinatorial samples were characterized using optical and electron microscopy, x-ray diffraction, and indentation to estimate the porosity, grain size, crystallographic texture, secondary phase precipitation, and hardness. Indentation and porosity results were compared against a regular sample. The smaller-sized regions (3 mm x 4 mm) in the combinatorial sample have a lower hardness compared to a larger regular sample (20 mm x 20 mm) with similar porosity (< 0.03 %). Despite this difference, meaningful trends were identified with the combinatorial sample for grain size, crystallographic texture, and porosity versus laser power and scan speed as well as trends with hardness versus stress-relief condition.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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