Grain boundary engineering during the laser powder bed fusion of TiC/316L stainless steel composites: New mechanism for forming TiC-induced special grain boundaries

Li, Jing; Qu, Hongqiao; Bai, Jiaming

doi:10.1016/j.actamat.2021.117605

Cited by 56 publications

(13 citation statements)

References 58 publications

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“…Random crystal orientations of the matrix grains was obtained in the microstructure of these SMCs. The grains were also significantly refined due to the addition of TiC particles, since they act as heterogeneous nucleation sites leading to grain refinement [166].…”

Section: Texture Featurementioning

confidence: 99%

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Chen,

Kosiba,

Suryanarayana

et al. 2023

International Materials Reviews

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Laser-based additive manufacturing (LBAM) has shown great potential in the development of new metallic materials, especially in the design and fabrication of metal matrix composites (MMCs). Steel matrix composites (SMCs) as one MMC-type, have been successfully additively manufactured with full density and good performance. This article reviews emerging studies of LBAM-fabricated SMCs, starting from the methods of feedstock preparation including respective merits and challenges. The mechanisms of phase transformation, grain growth and texture development of the steel matrix, as well as the precipitation of reinforcements during rapid solidification inherent to LBAM are demonstrated. Microstructural features of SMCs with different matrix (austenitic, martensitic, duplex and ferritic) and reinforcement types are discussed. The interrelationship between the composition and physical properties of the composite powder, microstructures and mechanical properties of SMCs are disclosed and the involved strengthening mechanisms are discussed. Lastly, conclusions and outlook focusing on emerging trends of LBAM-fabricated SMCs are presented.

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Section: Texture Featurementioning

confidence: 99%

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Chen,

Kosiba,

Suryanarayana

et al. 2023

International Materials Reviews

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“…It is also an earlier class of alloy in AM since steel normally has good printability. [ 164 ] In this way, the organization and performance control of steel in the 3D printing process has become the focus of current research. In the AM process, the deposited material undergoes rapid heating and cooling processes in the initial deposition process, as well as a rapid annealing process in the subsequent deposition of the solidified materials, where the thermal history is extremely complex.…”

Section: Fatigue Performance Of Amed Metalsmentioning

confidence: 99%

“…316L SS exhibits high yield strength and surprisingly good ductility among the steel family and is the most widely used steel in the AM process. [ 164 ] Thus, the following subsections will focus on discussing the 316L SS alloy.…”

Section: Fatigue Performance Of Amed Metalsmentioning

confidence: 99%

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Review on Fatigue of Additive Manufactured Metallic Alloys: Microstructure, Performance, Enhancement, and Assessment Methods

Liu,

Yu,

Guo

et al. 2023

Advanced Materials

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Additive manufacturing (AM), which is a process of building objects in a layer‐upon‐layer fashion from designed models, has received unprecedented attention from research and industry because it offers outstanding merits of flexibility, customization, reduced buy‐to‐fly ratio, and cost‐effectiveness. However, the fatigue performance of safety‐critical industrial components fabricated by AM is still far below that obtained from conventional methods. This review discusses the microstructural heterogeneities, randomly dispersed defects, poor surface quality, and complex residual stress generated during the AM process that can negatively impact the fatigue performance of as‐printed parts. The difference in microstructural origin of fatigue failure between conventionally manufactured and printed metals is reviewed with particular attention to the effects of the trans‐scale microstructures on AM fatigue failure mechanisms. Various methods for mitigating the fatigue issue, including pre‐process, inter‐process and post‐process treatments, are illustrated. Empirical, semi‐empirical and microstructure‐sensitive models are presented to predict fatigue strength and lifetime. Summary and outlooks for future development of the fatigue performance of AM materials are provided.This article is protected by copyright. All rights reserved

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“…The main purpose is to obtain a superior material by improving the properties of the matrix metal with the employment of reinforcing materials. 1,2 Steels exhibit good strength, corrosion, wear and fatigue properties and they are not generally used as matrix materials because they generally meet the most requirements for many engineering materials already. However, the automotive and aerospace industries that have showed significant developments in recent years necessitate engineering materials with outstanding properties.…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of AISI 316L stainless steel matrix hybrid composites reinforced with boron carbide and carbon nanotubes

Zengin

Ahlatçı

Zengin

2023

Journal of Composite Materials

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In this study, microstructure, mechanical, tribological and corrosion properties of boron carbide (B4C) and carbon nanotubes (CNT) reinforced hybrid AISI 316L stainless steel matrix nanocomposites were investigated. The AISI 316L stainless steel alloy and 316L-1B4C-1CNT (vol%), 316L-2B4C-2CNT (vol%), 316L-4B4C-4CNT (vol%) composites were fabricated by hot pressing under vacuum conditions. The fabricated samples showed minor porosities regardless of the concentration of B4C and CNT. Microstructure investigations revealed that a slight grain refinement was achieved with increasing incorporation of B4C and CNT. Furthermore, Fe3C and Cr23C6 intermetallics progressively formed along the grain boundaries in the hybrid composites. The hardness, compressive yield strength and wear resistance of 316L stainless steel exhibited continuous improvement with increasing additions of B4C and CNT. However, the hybrid composites exhibited higher susceptibility to pitting corrosion.

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Grain boundary engineering during the laser powder bed fusion of TiC/316L stainless steel composites: New mechanism for forming TiC-induced special grain boundaries

Cited by 56 publications

References 58 publications

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Feedstock preparation, microstructures and mechanical properties for laser-based additive manufacturing of steel matrix composites

Review on Fatigue of Additive Manufactured Metallic Alloys: Microstructure, Performance, Enhancement, and Assessment Methods

Production and characterization of AISI 316L stainless steel matrix hybrid composites reinforced with boron carbide and carbon nanotubes

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