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موارد یافت شده: 12628 1 - Prevalence of oxygen defects in an in-plane anisotropic transition metal dichalcogenide (چکیده) 2 - Pragmatic Analysis on Leech s Maxims in three Surahs from The Holy Quran (چکیده) 3 - DroidTKM: Detection of Trojan Families using the KNN Classifier Based on Manhattan Distance Metric (چکیده) 4 - بررسی تغییرات کیفی محیط ...
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Porosity, Hardness, Friction and Wear Performance Analysis ...
Aug 12, 2020· Selective laser melting (SLM), a type of additive manufacturing, is a powder bed process that makes use of a high-power laser beam to completely melt a thin layer of powder on a substrate, layer upon layer to form a solid part. This experimental study confirmed that laser power and scanning speed are indeed SLM's most significant process parameters that affect porosity as stated in .
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Achieveressays is the one place where you find help for all types of assignments. We write high quality term papers, sample essays, research papers, dissertations, thesis papers, assignments, book reviews, speeches, book reports, custom web content and business papers.
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Experimental investigation on selective laser melting of ...
Jan 01, 2017· Selective laser melting (SLM) is an additive manufacturing (AM) technique that uses powders to fabricate 3Dparts directly. The objective of this paper is to perform an experimental investigation of selective laser melted 17-4PH stainless steel.
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Influence of microstructure and manganese sulfides on ...
May 15, 2020· The corrosion resistance of 17-4PH stainless steel obtained by Selective Laser Melting was investigated. It was found that the as-built SLM-ed steel was entirely ferritic, not martensitic as expected. Re-austenitized SLM-ed steel recovered the martensitic microstructure.
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The effects of fabrication atmosphere condition on the ...
Jul 01, 2019· Chemical composition of stainless steel 17-4PH powder used in the present work is listed in Table 1. The size of the powder ranges from 45 to 105 μm. The dimension of the LDMed 17-4PH as-deposited samples was 70 mm × 20 mm × 10 mm on stainless steelSS304 plates, as shown in Fig. 1(b). Prior to fabrication, powder was dried in a drying oven ...
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Layerwise Anomaly Detection in Laser Powder-Bed Fusion ...
Jan 17, 2019· Google Scholar. Alaa Elwany. Alaa Elwany ... Mechanical Properties and Microstructural Characterization of Selective Laser Melted 17-4 PH Stainless Steel," ... Influences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17-4PH Stainless Steel," Solid Freeform Fabrication Symposium (SFF), Austin, TX,
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Characterisation of 17-4PH metallic powder recycling to ...
Mar 01, 2020· H. Gu, H. Gong, D. Pal, K. Rafi, T. Starr, B. StuckerInfluences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17-4PH Stainless Steel. 24th, Annual international solid freeform fabrication symposium; an additive .
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Mar 15, 2020· Martensite precipitation hardening stainless steels, such as 17-4PH and 15-5PH, are strengthened by the precipitation of Cu-rich particles in the martensite matrix, which predominantly occurs following heat treatment (H900) .These specific metals are ideally suited for structural materials and related applications in marine environments, power plants (light-water and pressurized water reactors ...
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Microstructures and mechanical properties of injection ...
This paper describes the sintering of an injection molded 17-4 PH stainless steel with additions of nickel boride (NiB), with the aim of producing high mechanical properties. Boron is evaluated as the best sintering enhancing element in terms of densifying the iron-based materials by formation the liquid phase. Sintered density and mechanical properties were increased with the increased amount ...
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Comparison of Microstructure and ... - Semantic Scholar
The second-generation aluminum-magnesium-scandium (Al-Mg-Sc) alloy, which is often referred to as Scalmalloy®, has been developed as a high-strength aluminum alloy for selective laser melting (SLM). The high-cooling rates of melt pools during SLM establishes the thermodynamic conditions for a fine-grained crack-free aluminum structure saturated with fine precipitates of the ceramic phase ...
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Comparison of Mechanical, Metallurgical Properties of 17 ...
The purpose of this research was to analyze and compare the mechanical properties of parts made using both Direct Metal Laser Sintering (DMLS) and traditional manufacturing methods like casting or forging. Previous research in DMLS was conducted using various materials, but there has been very little done for 17-4PH stainless steel. All the samples used for testing were conducted using the ...
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Sensors | Free Full-Text | Analysis of Modern Optical ...
For this purpose, a specific testing part was designed and SLM-manufactured in 17-4PH stainless steel. Once the part was measured by contact (obtaining the reference GD&T values), it was optically measured. The scanning results allow comparing the OMSs in terms of their inspection speed as well as dimensional and geometrical accuracy.
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Microstructure and Mechanical Behavior of 17-4 ...
Sep 12, 2014· The mechanical behavior and the microstructural evolution of 17-4 precipitation hardenable (PH) stainless steel processed using selective laser melting have been studied. Test coupons were produced from 17-4 PH stainless steel powder in argon and nitrogen atmospheres. Characterization studies were carried out using mechanical testing, optical microscopy, scanning .
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The Effect of a Scanning Strategy on ... - Semantic Scholar
(a) Principle of selective laser melting (SLM) manufacturing equipment; (b) particle size distribution (PSD). Table 1. Powder composition of 316L (mass fraction, wt %). Element Content (%) C 0.03 Cr 17.5 Ni 12.06 Mo 2.06 Si 0.86 Mn 0.3 O 0.09 S 0.032 P 0.029 Fe Bal. Table 2. SLM processing parameters of 316L steel powder. Laser Power/W 160 ...
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Constant Extension Rate Testing of Additively Manufactured ...
Of interest in this study is 17-4PH steel, a martensitic, high-strength stainless steel with the composition specification listed in Table 1. 17-4PH is one of the most widely used stainless steels,13 and is used in applications where moderate corrosion resistance and high strength are .
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Zhiheng Hu - Google - Google Scholar
Experimental investigation on selective laser melting of 17-4PH stainless steel. Z Hu, H Zhu, H Zhang, X Zeng. Optics & Laser Technology 87, 17-25, 2017. 105: ... Selective Laser Melting of Cu10Zn alloy powder using high laser power. S Zhang, H Zhu, Z Hu, X Zeng, F .
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Process Mapping and In-Process Monitoring of Porosity in ...
Jul 27, 2018· Influences of Energy Density on Porosity and Microstructure of Selective Laser Melted 17-4PH Stainless Steel Solid Freeform Fabrication Symposium, Austin, TX, Aug. 13–15 p.
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The corrosion resistance of 17-4PH stainless steel obtained by Selective Laser Melting was investigated. It was found that the as-built SLM-ed steel was entirely ferritic, not martensitic as expected. Re-austenitized SLM-ed steel recovered the martensitic microstructure.
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Thomas Starr - Google Scholar
Influences of energy density on porosity and microstructure of selective laser melted 17-4PH stainless steel H Gu, H Gong, D Pal, K Rafi, T Starr, B Stucker 2013 Solid Freeform Fabrication Symposium 474, .
Get priceMetal injection moulding of a 17-4 PH stainless steel: a ...
Murr L E, Martinez E, Hernandez J, Collins S, Amato K N, Gaytan S M and Shindo P W 2012 Microstructures and Properties of 17-4 PH Stainless Steel Fabricated by Selective Laser Melting J. Mater. Res. Technol. 1 167-77. Crossref Google Scholar
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Laser deposition additive manufacturing of 17-4PH ...
Similar to the DB process, the 17-4PH stainless steel powder was later deposited on the V surface of the Ti-6Al-4V/V bar via DED at the laser power of 180 W. A schematic and images of the bonded joint are shown in Figure 1. The experiment is further described in the supplementary material.
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A Study of Selective Laser Melting Technology on the Ultra ...
Cite this paper as: Miroslav P., Pavlĺna T., Jana H., Pavel Š., Boivie K. (2017) A Study of Selective Laser Melting Technology on the Ultra-High Strength Tool Steel Use—Quality, Mechanical Properties and .
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deepankar pal - Google Scholar
Influences of energy density on porosity and microstructure of selective laser melted 17-4PH stainless steel H Gu, H Gong, D Pal, K Rafi, T Starr, B Stucker 2013 Solid Freeform Fabrication Symposium 474, .
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Zhiheng Hu - Google Scholar
The following articles are merged in Scholar. Their combined citations are counted only for the first article. ... Selective laser melting of high strength Al–Cu–Mg alloys: Processing, microstructure and mechanical properties ... Experimental investigation on selective laser melting of 17-4PH stainless steel. Z Hu, H Zhu, H Zhang, X Zeng ...
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Influences of energy density on porosity and microstructure of selective laser melted 17-4PH stainless steel H Gu, H Gong, D Pal, K Rafi, T Starr, B Stucker 2013 Solid Freeform Fabrication Symposium 474, .
Get priceUS 9254535 B2 - Apparatuses, Systems And Methods For .
Criales, et al. Laser material processing methods: micromachining, laser exfoliation and selective laser melting: prediction modeling of temperature field and melt pool size using finite element modeling of selective laser melting for inconel 625. Atilim University. Metal Forming Center of Excellence, Ankara, Turkey. Nov. 14, 2014. 77 pages.
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Fabrication of Metal Components using FDMet: Fused ...
The results showed that 17-4PH stainless steel is a suitable metal powder material. During the fabrication process, we found that this molding technique could not be used to fabricate very complex geometric shape. The current efforts are directed at developing a direct metal component fabrication method: Fused Deposition of Metals (FDMet).
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Effect of Different Heat Treatments on Mechanical ...
Sep 13, 2017· Effects of Aging on the Microstructure of 17-4 PH Stainless Steel," Mater. Sci. ... Microstructure and Chemistry Evaluation of Direct Metal Laser Sintered 15-5 PH Stainless Steel," Master's thesis, ... Effect of Heat Treatment on Impact Toughness of Selective Laser Melted Stainless Steel .
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Finite Element Modeling of Selective Laser Melting 316L Stainless Steel Parts for Evaluating the Mechanical Properties MSEC2016 Modeling the Influence of Build Orientation on the Monotonic and Cyclic Response of Additively Manufactured Stainless Steel GP1/17-4PH
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Experimental investigation of the effect of processing ...
3/16/2020· Hu Z, Zhu H, Zhang H and Zeng X 2017 Experimental investigation on selective laser melting of 17-4PH stainless steel Opt. Laser Technol. 87 17–25 Crossref Google Scholar Export references: BibTeX RIS
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