Microstructure and wear properties of selective laser melting 316L

Huang, Yubao; Yang, Shanglei; Gu, Jiaxing; Xiong, Qi; Duan, Chenfeng; Meng, Xuan; Fang, Yu

doi:10.1016/j.matchemphys.2020.123487

Cited by 53 publications

(26 citation statements)

References 20 publications

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“…SLM is not only a useful supplement to traditional processing methods such as casting, forging, welding and machining, but also a new manufacturing mode of metal parts. SLM has broad prospects for development in the biomedical, aerospace and energy industries [6,7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Fatigue Damage of 316L Stainless Steel Manufactured by Selective Laser Melting (SLM)

et al. 2021

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In this paper, 316L stainless steel powder was processed and formed by selective laser melting (SLM). The microstructure of the sample was studied using an optical microscope, and the fatigue failure of the sample and the characteristics of crack initiation and propagation were analyzed, providing a research basis for the application of SLM-316L. Due to the influence of microstructure and SLM process defects, the fatigue cracks of SLM-316L mainly emerged due to defects such as lack of fusion and pores, while the cracks of rolled 316L initiated at the inclusions near the surface of the specimen. After fatigue microcrack initiation of the SLM-316L specimen, due to the existence of shear stress and tear stress, the crack tip was passivated and Z-shaped propagation was formed. The existence of internal defects in SLM-316L made the microcrack initiation random and diverse. At the same time, the existence of defects affected the crack propagation in the form of bending, bifurcation and bridge, which made the main crack propagation deviate from the maximum load direction.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Fatigue Damage of 316L Stainless Steel Manufactured by Selective Laser Melting (SLM)

et al. 2021

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“…As for the beneficial influence that porosity can play, Huang et al found that LPBF 316L generally displayed better sliding wear resistance against GCr15 than wrought 316L and they proposed that the presence of pores in the former improved its wear resistance because worn debris could be trapped, compacted and cold welded into the pores [164]. However, it is plausible that the LPBF 316L could have performed well despite containing porosity by virtue of it being harder than the wrought 316L.…”

Section: Wear Behaviormentioning

confidence: 99%

A critical review on the effects of process-induced porosity on the mechanical properties of alloys fabricated by laser powder bed fusion

et al. 2022

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Laser powder bed fusion (LPBF) is an emerging additive manufacturing technique that is currently adopted by a number of industries for its ability to directly fabricate complex near-net-shaped components with minimal material wastage. Two major limitations of LPBF, however, are that the process inherently produces components containing some amount of porosity and that fabricated components tend to suffer from poor repeatability. While recent advances have allowed the porosity level to be reduced to a minimum, consistent porosity-free fabrication remains elusive. Therefore, it is important to understand how porosity affects mechanical properties in alloys fabricated this way in order to inform the safe design and application of components. To this aim, this article will review recent literature on the effects of porosity on tensile properties, fatigue life, impact and fracture toughness, creep response, and wear behavior. As the number of alloys that can be fabricated by this technology continues to grow, this overview will mainly focus on four alloys that are commonly fabricated by LPBF—Ti-6Al-4 V, Inconel 718, AISI 316L, and AlSi10Mg.

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“…It was developed in the second half of the 1990s [14]. Currently, the structure and properties of SLM products are widely studied [9,15,16]. In paper [16], a sample made of 316L steel by means of SLM was subjected to microstructure analysis, Vickers hardness test, and wear test.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the structure and properties of SLM products are widely studied [9,15,16]. In paper [16], a sample made of 316L steel by means of SLM was subjected to microstructure analysis, Vickers hardness test, and wear test. The results were compared to those obtained for similar analyzes of a rolled sample made of the same material.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on the Structure and Quality of SLM and Cast AISI 316L Samples Subjected to WEDM Processing

et al. 2022

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Additive manufacturing technologies are increasingly used in the production of semi-finished workpieces intended for further processing. This entails the need to investigate the machinability and final properties of such products. Comparative research on wire electrical discharge machining (WEDM) processes performed with two kinds of AISI 316L stainless steel workpieces is presented in this paper. The first workpiece was made by selective laser melting (SLM), while the second one was casting. Both working materials were cut with current values ranging from 8 to 72 amps. A comparison of roughness, structure and chemical composition of machined surfaces was performed between the two kinds of specimens. For the SLM sample, parameters of the cutting process that provide relatively low surface roughness (Ra ≤ 10 µm) with the simultaneous maximization of the process efficiency were determined. It was found that in the case of applying high current values (72 amp.), more favorable properties of the treated surface were obtained for the SLM sample than for the cast one.

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Microstructure and wear properties of selective laser melting 316L

Cited by 53 publications

References 20 publications

Microstructure and Fatigue Damage of 316L Stainless Steel Manufactured by Selective Laser Melting (SLM)

Microstructure and Fatigue Damage of 316L Stainless Steel Manufactured by Selective Laser Melting (SLM)

A critical review on the effects of process-induced porosity on the mechanical properties of alloys fabricated by laser powder bed fusion

A Comparative Study on the Structure and Quality of SLM and Cast AISI 316L Samples Subjected to WEDM Processing

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