Building direction dependence of wear resistance of selective laser melted AISI 316L stainless steel under high-speed tribological environment

Bae, Ki Chang; Ha, Kyung Sik; Kim, Yong Hwan; Oak, Jeong-Jung; Lee, Wookjin; Park, Taesung

doi:10.1007/s00170-020-05572-8

Cited by 19 publications

(10 citation statements)

References 31 publications

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“…Therefore, it can be seen that the SLM-produced SS316L with sub-grain cell generated by rapid solidification has the same crystal structure as cold-rolled SS316L. The SS316L printed in one direction through the PBF process has a different arrangement of the melt pool and a different microstructure due to the laser scan direction, and thus, has mechanical anisotropy according to the building direction of the material [23,24,36,37]. The SS316L alloy is very important in applications for corrosion resistance as well as mechanical properties; so, it is necessary to evaluate it compared with the coldrolled SS316L.…”

Section: Resultsmentioning

confidence: 95%

“…A so-called 90 • rotate scanning strategy was used, i.e., the laser scanning lines are tilted by 90 • between each layer. Further details of the material, including the microstructure, tensile property, and wear behavior relative to the building direction, were reported previously by a few of the present authors in [17,23,24,28]. To evaluate the corrosion property of the SLMed SS316L samples, two types of specimens were built in different directions relative to the building orientation.…”

Section: Preparation Of Specimensmentioning

confidence: 86%

“…They concluded that optimizing the SLM process parameters showed superior ultimate tensile strength and elongation compared with SS316L alloys manufactured by traditional casting processes. Lee et al [23,24] investigated the microstructure, tensile properties, and wear properties of SS316L produced by the SLM process according to the building direction. The tensile property and wear resistance are changed by the melt-pool boundary generated during the process and a sub-grain cell with a size of 1 µm or less, and it was reported that the alloy manufactured by the SLM process has similar mechanical properties compared with the cold-rolled material.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance of Laser Powder Bed Fused AISI 316L Stainless Steel and Effect of Direct Annealing

et al. 2022

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Alloy parts produced by an additive manufacturing method with rapid heat transfer from fast melting and solidification have different microstructures, characteristics, and performances compared with materials made by the conventional process. In this study, the corrosion and oxidation resistance of SS316L, which was prepared by the powder bed fusion process, was compared with those of cold-rolled SS316L. Additionally, the surface oxide film on stainless steel was thoroughly assessed since the film has the greatest influence on the corrosion and oxidation resistance. The effect of heat treatment on corrosion and oxidation resistance of SS316L fabricated by additive manufacturing was investigated. The SS316L has a microstructure formed by sub-grain cells, in which locally concentrated alloying elements form a stable passive film. As a result, it has a higher level of corrosion resistance and oxidation resistance than conventional cold-rolled materials. However, it was confirmed that the sub-grain cell was removed by heat treatment, which resulted in the degradation of corrosion and oxidation resistance.

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Section: Resultsmentioning

confidence: 95%

Section: Preparation Of Specimensmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance of Laser Powder Bed Fused AISI 316L Stainless Steel and Effect of Direct Annealing

et al. 2022

Self Cite

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“…To illustrate, the following studies [6][7][8][9] reported superior wear resistance of 316L produced via AM compared with 316L produced via conventional routes. On the contrary, Bae et al [10] reported opposing results. Adding to the complexity, we observed both superior and inferior wear performance in AM 316L compared to conventional 316L depending on the loading and anisotropic behavior [4].…”

Section: Introductionmentioning

confidence: 96%

In situ observation of anisotropic tribological contact evolution in 316L steel formed by selective laser melting

Bahshwan

Gee

Nunn

et al. 2022

Wear

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“…e metal parts formed directly by the technique exhibit high dimensional accuracy, good surface quality, and almost 100% density [1][2][3]. SLM 316L stainless steel, as a typical AM metal, is widely used in the aerospace and marine machinery fields due to its good mechanical properties [4][5][6][7][8]. e metal components of the SLM 316L stainless steel are often subjected to harsh service conditions during use, requiring higher demands on their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Treatment on the Microstructure and Mechanical Properties of Selective Laser Melting 316L Stainless Steel

Lei

Liu

et al. 2021

Shock and Vibration

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316L stainless steel materials are widely used in impact-resistant structures. Heat treatments could affect the mechanical properties of 316L stainless steel parts formed by selective laser melting (SLM), which is vital for ensuring service safety. This study aimed to analyze the mechanical behavior of SLM 316L stainless steel under different heat treatment methods. Therefore, test specimens were prepared using the SLM technique and then annealed at 400°C for 1 h. The solution was treated at 1050°C for 20 min. The dynamic compressive mechanical properties of the deposited, annealed, and solution-treated specimens were tested at high strain rates by using a split Hopkinson pressure bar (SHPB) experimental apparatus. Moreover, the microstructures of the previously mentioned samples were analyzed by optical microscopy and scanning electron microscopy. The experimental results showed that the three-state samples exhibited strain rate sensitivity in the dynamic mechanical tests and that solution treatment could alter their mechanical properties significantly. In addition, the microstructure of the deposited specimens presented cylindrical cellular crystal features, which have a higher dislocation density. Hence, the yield strength of deposited specimens is higher than that of the solution-treated ones. After annealing, the microstructures of the samples did not change obviously, and their dynamic yield strength remained almost unchanged. After solution treatment, its cellular crystal disappeared and dislocation density dropped dramatically, resulting in a sharp decrease in yield strength. Finally, this research can provide a theoretical reference for broadening the practical application of SLM 316L material parts.

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Building direction dependence of wear resistance of selective laser melted AISI 316L stainless steel under high-speed tribological environment

Cited by 19 publications

References 31 publications

Corrosion Resistance of Laser Powder Bed Fused AISI 316L Stainless Steel and Effect of Direct Annealing

Corrosion Resistance of Laser Powder Bed Fused AISI 316L Stainless Steel and Effect of Direct Annealing

In situ observation of anisotropic tribological contact evolution in 316L steel formed by selective laser melting

Effects of Heat Treatment on the Microstructure and Mechanical Properties of Selective Laser Melting 316L Stainless Steel

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