Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg

Liu, Yujing; Liu, Zeng Qian; Jiang, Yehua; Wang, G.W; Yang, Yugui; Zhang, Lai-Chang

doi:10.1016/j.jallcom.2017.11.020

Cited by 298 publications

(95 citation statements)

References 51 publications

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“…Mechanical properties of metal parts vary significantly with microstructure, including the phase type, grain size and shape, dendrite, and element segregation [38]. Optical microscopy images of the microstructure of SLMed parts subjected to finish machining at different feed rates are shown in Figure 11.…”

Section: Microstructurementioning

confidence: 99%

Porosity, Surface Quality, Microhardness and Microstructure of Selective Laser Melted 316L Stainless Steel Resulting from Finish Machining

Kaynak

Kıtay

2018

JMMP

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Among additive manufacturing (AM) techniques, Selective Laser Melting (SLM) is widely used to fabricate metal components, including biocompatible bone implants made of 316L stainless steel. However, an issue with the components manufactured using this technique is the surface quality, which is generally beyond the acceptable range. Thus, hybrid manufacturing, including AM and finish machining processes, are being developed and implemented in the industry. Machining processes, particularly finish machining, are needed to improve surface quality of additively manufactured components and performance. This study focuses on the finish machining process of additively manufactured 316L stainless steel parts. Finish machining tests were carried out under dry conditions for various cutting speeds and feed rates. The experimental study reveals that finish machining resulted in up to 88% lower surface roughness of SLMed 316L stainless steel; it also had a substantial effect on microstructure and microhardness of the additively manufactured components by creating smaller grains and strain-hardened layer on the surface and subsurface of the SLMed part. The finish machining process also significantly decreased the density of porosity on the surface and subsurface, compared to an as-built sample. The created strain harden layer with less porosity is expected to increases wear and fatigue resistance of these parts.

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Section: Microstructurementioning

confidence: 99%

Porosity, Surface Quality, Microhardness and Microstructure of Selective Laser Melted 316L Stainless Steel Resulting from Finish Machining

Kaynak

Kıtay

2018

JMMP

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“…Additive manufacturing (AM) has been emerging as a technology with the ability to realize three‐dimensional shapes with complex geometries based on the layer‐by‐layer incremental manufacturing concept . Currently, there exist several representative AM techniques, including inkjet printing (IJP), fused deposition modeling (FDM), selective laser sintering (SLS), ultrafast laser processing, selective laser melting (SLM), and electron beam melting (EBM) . So far, many alloys, such as steels, titanium alloys, and aluminum alloys, have been used to fabricate products with excellent properties .…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Titanium Alloys by Electron Beam Melting: A Review

et al. 2017

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Electron beam melting (EBM), as one of metal additive manufacturing technologies, is considered to be an innovative industrial production technology. Based on the layer-wise manufacturing technique, as-produced parts can be fabricated on a powder bed using the 3D computational design method. Because the melting process takes place in a vacuum environment, EBM technology can produce parts with higher densities compared to selective laser melting (SLM), particularly when titanium alloy is used. The ability to produce higher quality parts using EBM technology is making EBM more competitive. After briefly introducing the EBM process and the processing factors involved, this paper reviews recent progress in the processing, microstructure, and properties of titanium alloys and their composites manufactured by EBM. The paper describes significant positive progress in EBM of all types of titanium in terms of solid bulk and porous structures including Ti-6Al-4V and Ti-24Nb-4Zr-8Sn, with a focus on manufacturing using EBM and the resultant unique microstructure and service properties (mechanical properties, fatigue behaviors, and corrosion resistance properties) of EBM-produced titanium alloys.

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“…SLM technology is a layer‐wise process in accordance with a pre‐designed 3D model under a protective atmosphere. Ti alloy parts are produced layer by layer by selectively melting, which consolidates the powder at a high rate by using a computer‐controlled laser . SLM provides a wide range of advantages compared with the conventional manufacturing methods, such as lower production time, higher material utilization, almost no geometric constrictions, and further post‐processing .…”

Section: New Preparation Methods Of Ti Alloys For Biomedical Applicatmentioning

confidence: 99%

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

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Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

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Gradient in microstructure and mechanical property of selective laser melted AlSi10Mg

Cited by 298 publications

References 51 publications

Porosity, Surface Quality, Microhardness and Microstructure of Selective Laser Melted 316L Stainless Steel Resulting from Finish Machining

Porosity, Surface Quality, Microhardness and Microstructure of Selective Laser Melted 316L Stainless Steel Resulting from Finish Machining

Additive Manufacturing of Titanium Alloys by Electron Beam Melting: A Review

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

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