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Direct Ink Writing of AISI 316L Dense Parts and Porous Lattices
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2022-09-21 , DOI: 10.1002/adem.202101729
Lisa Biasetto 1 , Hamada Elsayed 2, 3
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2022-09-21 , DOI: 10.1002/adem.202101729
Lisa Biasetto 1 , Hamada Elsayed 2, 3
Affiliation
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The focus of the present work is the development of a metallic ink that possesses controlled rheological properties: by keeping printing parameters constant both AISI 316L dense parts and porous scaffolds have been produced. Shrinkage, porosity, and mechanical properties have been studied to evaluate the link between the ink rheological properties and the final part. Depending on binder composition, linear shrinkage ranging from 9% to 22% and porosity from 34 to 7 vol% are measured. Tensile strength for specimens sintered at 1240 °C reach the value of 444 MPa and elongation at a break of 12.3%. These values are still far from additively manufactured AISI 316L parts with powder bed fusion technologies, but represent an improvement compared to previously reported data in the literature for AISI 316L parts 3D printed by DIW. Porous scaffolds with a spanning distance of 1.2 mm are printed and sintered. Porosity of 74 vol% and compression strength of 74 MPa are measured for this set of samples showing how the produced ink represents a valuable alternative to pastes already present in the literature.
中文翻译：
AISI 316L 致密部件和多孔晶格的直接墨水书写
目前工作的重点是开发具有受控流变特性的金属油墨：通过保持印刷参数恒定，可以生产 AISI 316L 致密部件和多孔支架。研究人员研究了收缩率、孔隙率和机械性能，以评估油墨流变性能与最终部件之间的联系。根据粘合剂的组成，测得的线性收缩率为 9% 至 22%，孔隙率为 34 至 7 vol%。在 1240 °C 烧结的试样的抗拉强度达到 444 MPa 的值，断裂伸长率达到 12.3%。这些值与采用粉末床融合技术的增材制造 AISI 316L 零件相比仍相差甚远，但与文献中先前报道的 DIW 3D 打印 AISI 316L 零件数据相比，代表了改进。打印并烧结跨距为 1.2 mm 的多孔支架。这组样品的孔隙率为 74 vol%，抗压强度为 74 MPa，表明所生产的油墨如何成为文献中已有的浆料的有价值替代品。
更新日期：2022-09-21
中文翻译：
AISI 316L 致密部件和多孔晶格的直接墨水书写
目前工作的重点是开发具有受控流变特性的金属油墨：通过保持印刷参数恒定，可以生产 AISI 316L 致密部件和多孔支架。研究人员研究了收缩率、孔隙率和机械性能，以评估油墨流变性能与最终部件之间的联系。根据粘合剂的组成，测得的线性收缩率为 9% 至 22%，孔隙率为 34 至 7 vol%。在 1240 °C 烧结的试样的抗拉强度达到 444 MPa 的值，断裂伸长率达到 12.3%。这些值与采用粉末床融合技术的增材制造 AISI 316L 零件相比仍相差甚远，但与文献中先前报道的 DIW 3D 打印 AISI 316L 零件数据相比，代表了改进。打印并烧结跨距为 1.2 mm 的多孔支架。这组样品的孔隙率为 74 vol%，抗压强度为 74 MPa，表明所生产的油墨如何成为文献中已有的浆料的有价值替代品。
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