Forming Process and Properties of TiC/Ti Bulk-Form Nanocomposites Prepared by Selective Laser Melting

2011 ◽  
Vol 38 (6) ◽  
pp. 0603024
Author(s):  
孟广斌 Meng Guangbin ◽  
顾冬冬 Gu Dongdong ◽  
李闯 Li Chuang ◽  
沈以赴 Shen Yifu ◽  
李玉芳 Li Yufang
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
Forming Process

scholarly journals Microstructure and Tensile Properties of AlSi10Mg Alloy Manufactured by Multi-Laser Beam Selective Laser Melting (SLM)

Metals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1337 ◽  
Author(s):  
Zhonghua Li ◽  
Zezhou Kuai ◽  
Peikang Bai ◽  
Yunfei Nie ◽  
Guang Fu ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Selective Laser Melting ◽  
High Efficiency ◽  
Grain Structure ◽  
Laser Forming ◽  
Laser Melting ◽  
Forming Process ◽  
Powder Bed ◽  
Moulding Process ◽  
Melt Pool

The multi-beam selective laser forming system is a new type of powder bed laser forming equipment that is different from single-laser selective laser melting (SLM) printers. It is a new generation for a metal powder material moulding process that has high efficiency, large size and batch manufacturing. It is a new development of a powder bed laser forming process trend. In this paper, the microstructure and tensile properties of both the multi-laser-formed AlSi10Mg isolated and overlap areas are studied to ensure that the parts can achieve perfect seamless splicing and to identify whether the parts in different regions have the same performance. It was discovered that as the number of scans increases, the depth and width of the melt pool and microscopic grain structure in the overlap zone increase. The preferential crystallite growth orientation reaches the (200) plane. A small amount of smooth surface appeared at the fracture of the overlap area of the two scans, the dimples were reduced and the structure became larger, resulting in a decrease in tensile properties.

Study on Selective Laser Melting Forming Process of Cobalt Chromium Alloy

2015 ◽  
Vol 42 (5) ◽  
pp. 0503001
Author(s):  
刘威 Liu Wei ◽  
刘婷婷 Liu Tingting ◽  
廖文和 Liao Wenhe ◽  
蒋立异 Jiang Liyi
Keyword(s):  
Selective Laser Melting ◽  
Chromium Alloy ◽  
Cobalt Chromium ◽  
Laser Melting ◽  
Forming Process ◽  
Cobalt Chromium Alloy

Investigation of selective laser melting process for Cu-5Sn alloy on surface roughness, microstructure and mechanical property

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Peng Yang ◽  
Dingyong He ◽  
Zengjie Wang ◽  
Zhen Tan ◽  
Hanguang Fu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Surface Roughness ◽  
Selective Laser Melting ◽  
High Strength ◽  
Melting Process ◽  
Scanning Speed ◽  
Laser Melting ◽  
Forming Process ◽  
Content Type

Purpose In this research, the highly dense bulk Cu-5Sn alloy specimens were fabricated using selective laser melting (SLM). This study aims to establish the relationship between laser power (LP), scanning speed (SS) and hatch space (HS) with surface roughness (Ra) and density. To obtain Cu-5Sn alloy formed parts with high strength and low surface roughness. The microstructure and mechanical properties of SLMed Cu-5Sn were investigated. Design/methodology/approach The relative density (RD) was optimized using the response surface method (RSM) and analysis of variance. First, the Ra of SLMed formed specimens was studied to optimize the forming process parameters with a good surface. Then, the dense specimens were studied by ANOVA and the RSM to obtain dense specimens for mechanical property analysis. Findings Dense specimens were obtained by RSM and ANOVA. The tensile properties were compared with the casted specimens. The yield and ultimate strengths increased from 71 and 131 MPa for the cast specimens to 334 and 489 MPa for the SLMed specimens, respectively. The ductility increased significantly from 11% to 23%, due to the refined microstructure of the SLMed specimens, as well as the formation of many twin crystals. Originality/value The Ra, RD and mechanical properties of SLM specimens Cu-5Sn were systematically studied, and the influencing factors were analyzed together. This study provides a theoretical and practical example to improve the surface quality and RD.

scholarly journals Research on the Effect of Key Technological Parameters on Molten Pool during Selective Laser Melting Processing

2021 ◽  
Vol 2097 (1) ◽  
pp. 012016
Author(s):  
Wentong Wang ◽  
Linfeng Tang ◽  
Congyan Chen ◽  
Yu Li ◽  
Tao Zhou
Keyword(s):  
Temperature Field ◽  
Selective Laser Melting ◽  
Molten Pool ◽  
Laser Power ◽  
Reference Value ◽  
Scanning Speed ◽  
Ansys Software ◽  
Technological Parameters ◽  
Laser Melting ◽  
Forming Process

Abstract Selective laser melting (SLM), as an emerging technology in additive manufacturing, often has various defects in the forming process. To ensure the consistency and stability of the parts forming quality, the effects of two typical technological parameters, laser power and scanning speed, on the temperature of molten pool are investigated in this paper. Firstly, the temperature field of Ti-6Al-4V is simulated theoretically via ANSYS software, and the effects of two typical technological parameters on the temperature field are studied. Then, in the experiment, using the designed radiation monitoring device and Ti-6Al-4V powder as forming material, the influence of these two typical factors on the state of molten pool is studied. The simulation and experimental results show that the temperature of molten pool shows positive correlation with the laser power and negative correlation with the scanning speed. This will provide a certain reference value for upgrading and optimizing SLM equipment.

scholarly journals A New Method for Automatic Detection of Defects in Selective Laser Melting Based on Machine Vision

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4175
Author(s):  
Zhenqiang Lin ◽  
Yiwen Lai ◽  
Taotao Pan ◽  
Wang Zhang ◽  
Jun Zheng ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Detection Method ◽  
Recognition Rate ◽  
Laser Melting ◽  
Forming Process ◽  
Fast Detection ◽  
Melting Pool ◽  
Forming Efficiency ◽  
Industrial Cameras

Selective laser melting (SLM) is a forming technology in the field of metal additive manufacturing. In order to improve the quality of formed parts, it is necessary to monitor the selective laser melting forming process. At present, most of the research on the monitoring of the selective laser melting forming process focuses on the monitoring of the melting pool, but the quality of forming parts cannot be controlled in real-time. As an indispensable link in the SLM forming process, the quality of powder spreading directly affects the quality of the formed parts. Therefore, this paper proposes a detection method for SLM powder spreading defects, mainly using industrial cameras to collect SLM powder spreading surfaces, designing corresponding image processing algorithms to extract three common powder spreading defects, and establishing appropriate classifiers to distinguish different types of powder spreading defects. It is determined that the multilayer perceptron (MLP) is the most accurate classifier. This detection method has high recognition rate and fast detection speed, which cannot only meet the SLM forming efficiency, but also improve the quality of the formed parts through feedback control.

MANUFACTURING NOVEL HEAT TRANSFER DEVICES BY SELECTIVE LASER MELTING

Equipment ◽  
2006 ◽  
Author(s):  
S. Tsopanos ◽  
M. Wong ◽  
I. Owen ◽  
C. J. Sutcliffe
Keyword(s):  
Heat Transfer ◽  
Selective Laser Melting ◽  
Laser Melting
Sign in / Sign up

Export Citation Format

Share Document