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Effects of TiC on the microstructure refinement and mechanical property enhancement of additive manufactured Inconel 625/TiC metal matrix composites fabricated with novel core-shell composite powder
Journal of Materials Science & Technology ( IF 10.9 ) Pub Date : 2023-06-01 , DOI: 10.1016/j.jmst.2023.04.033
Taegyu Lee, Wonjong Jeong, SeungHyeok Chung, Ho Jin Ryu

The flexible product shape of additive manufacturing (AM) is attractive, but the process suffers from a lack of material property diversity due to a limited number of printable alloys and post-processing options. To overcome this problem, the AM of metal matrix composites (MMCs) is a highly suitable solution because the properties of MMC can be tailored using various reinforcements. Therefore, extensive research has been conducted on the AM of MMCs; however, the major huddle for this process has been the difficulties in preparing feedstock powder and operating the AM process. This study introduces an easily synthesizable core-shell composite powder, which was fabricated by a recently developed process called the SMART process. The core-shell powder has a novel morphology, consisting of a metal core and composite shell, distinguishing it from the powders used in conventional AM approaches. Inconel 625/TiCp composites were fabricated using the core-shell composite powder, with various fractions of TiCp up to 10 vol.%. Compared to additive-manufactured Inconel 625, the additive-manufactured MMCs showed enhanced strength with significantly fewer defects. The results of this study may accelerate the application of MMC fabricated by AM, which offers superior properties and reliability compared to casting and powder metallurgy due to the higher degree of dislocation density and reinforcement dispersion.



中文翻译:

TiC 对新型核壳复合粉末增材制造的 Inconel 625/TiC 金属基复合材料微观结构细化和力学性能提高的影响

增材制造 (AM) 的灵活产品形状很有吸引力,但由于可印刷合金和后处理选项的数量有限,该工艺缺乏材料特性多样性。为了克服这个问题,金属基复合材料 (MMC) 的增材制造是一种非常合适的解决方案,因为可以使用各种增强材料来定制 MMC 的性能。因此,对MMCs的AM进行了广泛的研究;然而,该工艺的主要难题是难以制备原料粉末和操作增材制造工艺。本研究介绍了一种易于合成的核壳复合粉末,它是通过最近开发的一种称为 SMART 工艺的工艺制造的。核壳粉具有新颖的形貌,由金属核和复合壳组成,将其与传统 AM 方法中使用的粉末区分开来。Inconel 625/TiCp 复合材料是使用核-壳复合粉末制造的,其中 TiCp 的不同分数高达 10 vol.%。与增材制造的 Inconel 625 相比,增材制造的 MMC 显示出更高的强度和更少的缺陷。这项研究的结果可能会加速 AM 制造的 MMC 的应用,与铸造和粉末冶金相比,由于更高的位错密度和增强分散度,MMC 具有更优越的性能和可靠性。增材制造的 MMC 显示出增强的强度和明显更少的缺陷。这项研究的结果可能会加速 AM 制造的 MMC 的应用,与铸造和粉末冶金相比,由于更高的位错密度和增强分散度,MMC 具有更优越的性能和可靠性。增材制造的 MMC 显示出增强的强度和明显更少的缺陷。这项研究的结果可能会加速 AM 制造的 MMC 的应用,与铸造和粉末冶金相比,由于更高的位错密度和增强分散度,MMC 具有更优越的性能和可靠性。

更新日期:2023-06-01
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