Dependence of microstructure and properties in additive manufactured 18Ni300 on heat treatment and surface enhancement

Yan, Junxia; Meng, Xiangwei; Ou, Bingxian; Xie, Yuxin; Cai, Bin; Zhang, Yuwei; Fang, Shupeng

doi:10.1016/j.jmrt.2024.01.050

Cited by 3 publications

(1 citation statement)

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“…The specimens aged at 450 • C exhibited the highest yield strength when the building direction was horizontal. Yan et al [14] studied the microstructure and mechanical properties of additively manufactured 18Ni-300 maraging steel through solution treatment and aging treatment. The aging-treated specimens had higher hardness than the solubilization-treated specimens.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aging Temperature on Microstructure, Mechanical, and Wear Properties of 18Ni-300 Maraging Steel Produced by Powder Bed Fusion

Kwak,

Lim,

Heo

et al. 2024

Metals

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Additive manufacturing technologies for metallic materials based on powder bed fusion have enormous industrial potential. In this study, we manufactured 18Ni-300 maraging steel using the powder bed fusion (PBF) process and investigated the effects of annealing temperatures of 430 °C, 490 °C, and 550 °C for 3 h on its microstructure, tensile fracture mechanism, and wear properties compared with the as-built specimen. The results show that annealing heat treatment effectively improved the dry sliding friction, wear properties, and room temperature tensile properties compared to the as-built specimen. Compared to other aging-treated samples, specimens that underwent heat treatment in optimal settings had superior properties. With optimal heat treatment, while melt pool boundaries remained, the cellular and columnar structures became finer compared to the un-treated specimens, and the number of dimples decreased. Consequently, the hardness and tensile strength improved by approximately 56.17% and 40.63%, respectively. The 18Ni-300 maraging steel sample that underwent heat treatment at optimal settings exhibited a coefficient of friction approximately 33.33% lower than the as-built alloy.

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Section: Introductionmentioning

confidence: 99%