Molten metal jetting for repairing aluminum components

IF 4.2 Q2 ENGINEERING, MANUFACTURING
Benedikt Kirchebner , Kellen D. Traxel , Alexander E. Wilson-Heid , Eric S. Elton , Andrew J. Pascall , Jason R. Jeffries
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引用次数: 0

Abstract

Molten metal jetting (MMJ) is an additive manufacturing (AM) method where droplets of molten metal are used to build parts. Like most AM technologies, MMJ is typically used to build stand-alone parts rather than add onto existing parts. However, the droplet-wise deposition method of MMJ is inherently compatible with the ability to build on existing parts. Here, we utilize MMJ to “repair” machined damage on cast aluminum parts. A commercial MMJ system was used to fill in varied but defined groove geometries to find optimal shapes amenable to repair with MMJ. Subsequently, grooves were cut into tensile specimens and back-filled (repaired) using MMJ. Tensile tests indicate that MMJ repair restores significant strength to samples despite the distinct microstructure and void structures present in the repaired section. Repaired samples demonstrated tensile strengths ∼72 % of the as-received material, compared to UTS of ∼33 % for damaged samples. These results indicate that MMJ is a viable method to repair parts where other repair methods may be impractical.
用于修复铝部件的熔融金属喷射
熔融金属喷射(MMJ)是一种增材制造(AM)方法,其中熔融金属液滴用于构建零件。与大多数增材制造技术一样,MMJ通常用于构建独立部件,而不是添加到现有部件上。然而,MMJ的液滴沉积方法本质上与在现有部件上构建的能力相兼容。在这里,我们利用MMJ来“修复”铸铝零件的机械损伤。使用商用MMJ系统填充不同但已定义的凹槽几何形状,以找到适合MMJ修复的最佳形状。随后,将凹槽切割成拉伸试样,并使用MMJ进行回填(修复)。拉伸试验表明,尽管修复部分存在明显的微观结构和空洞结构,但MMJ修复可以显著恢复样品的强度。修复样品的抗拉强度为接收材料的72%,而损坏样品的抗拉强度为33%。这些结果表明,在其他修复方法可能不切实际的情况下,MMJ是一种可行的修复方法。
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
Additive manufacturing letters
Additive manufacturing letters Materials Science (General), Industrial and Manufacturing Engineering, Mechanics of Materials
CiteScore
3.70
自引率
0.00%
发文量
0
审稿时长
37 days
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