scholarly journals Laser Welding Modes Optimization of the Selective Laser Melted Ti-6Al-4V Thin-Thickness Parts with Complex Shape

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2013
Author(s):  
Maksim Larin ◽  
Yakov Pevzner ◽  
Svetlana Shalnova ◽  
Pavel Petrovskiy
Keyword(s):  
Laser Welding ◽  
Laser Power ◽  
Complex Shape ◽  
Metallographic Analysis ◽  
Technological Parameters ◽  
Laser Melting ◽  
Weld Shape ◽  
Full Factorial Experiment ◽  
Contour Plots ◽  
Full Factorial

The paper studies laser welding of thin-thickness Ti-6Al-4V parts, manufactured by selective laser melting (SLM). A full factorial experiment was carried out in order to construct a regression model of the technological parameters (laser power, welding speed, and defocusing amount) which influence the weld shape. Metallographic analysis was carried out and it was found that thermal cycles of product printing and laser welding are equivalent. The microhardness analysis also showed no differences between the weld metal and the base metal. The contour plots of the parameters influence on the response function was constructed, and the area of welding modes was determined.

scholarly journals The influence of technological parameters for the production of plasticized polyvinylbutyral films on their optical and physico-mechanical properties

2019 ◽  
pp. 7-8
Author(s):  
M. M. Egorov ◽  
V. I. Milov ◽  
M. K. Timin ◽  
T. P. Mukhina ◽  
V. S. Smirnov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mathematical Analysis ◽  
Polyvinyl Butyral ◽  
Factorial Experiment ◽  
Regression Equations ◽  
Technological Parameters ◽  
Full Factorial Experiment ◽  
Effect Of Pressure ◽  
Direct Pressing ◽  
Full Factorial

The effect of pressure, temperature and time during direct pressing on the strength and optical characteristics of adhesive plasticized polyvinyl butyral films is studied. A mathematical analysis of the results of a full factorial experiment is carried out and the regression equations are derived.

scholarly journals OPTIMIZATION PROCESS OF PRODUCTION PLANNING METHOD OF THE EXPERIMENT

2017 ◽  
Vol 2 (3) ◽  
pp. 139-144
Author(s):  
Серых ◽  
Inna Serykh ◽  
Черноситова ◽  
Elena Chernositova ◽  
Чернышева ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Production Planning ◽  
Fat Content ◽  
Planning Method ◽  
Factorial Experiment ◽  
Optimization Process ◽  
Technological Parameters ◽  
Full Factorial Experiment ◽  
Full Factorial ◽  
Selection Of

The results of the planning and implementation of a full factorial experiment on the selection of technological parameters of production special, providing the required values of fat. The results of the regression analysis allow to identify and assess the influence of components on the fat content of the product process. Set values of technological parameters, allowing to obtain the desired value of the investigated parameter.

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.

Selective Laser Melting of AlSi12 Powder

2018 ◽  
Vol 284 ◽  
pp. 667-672
Author(s):  
P.A. Lykov ◽  
R.M. Baitimerov
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Complex Shape ◽  
Technological Parameters ◽  
Laser Melting ◽  
Powder Feedstock ◽  
Selection Of ◽  
Low Porosity

Additive manufacturing (AM) technologies make it possible to produce complex shape metallic objects from powder feedstock. AlSi12 alloy is one of the most widely used materials in selective laser melting (SLM). The large number of technological parameters involved complicate the selection of an SLM mode for obtaining a product with the required structure. The goal of this research was to determine the mode which ensures the material’s low porosity. Nine specimens were fabricated by using different SLM process parameters. The fabricated specimens have different microstructures. The lowest porosity that was achieved is about 0.5%.

Effect of Linear Energy Density on Bubble-Defect of 316L Stainless Steel by Selective Laser Melting

2019 ◽  
Vol 803 ◽  
pp. 32-36
Author(s):  
Wen Hao Wang ◽  
Xin Yu Liu ◽  
Lu Pan
Keyword(s):  
Stainless Steel ◽  
Energy Density ◽  
Laser Power ◽  
316L Stainless Steel ◽  
Scanning Speed ◽  
Technological Parameters ◽  
Laser Melting ◽  
Product Density ◽  
Air Bubble ◽  
Test Verification

In the experiments of different process parameters (laser power, scanning speed and scanning distance),the low-time defects of forming part were studied by microscope,including air bubble, pore, micro-crack and macro-crack. The formation mechanism of bubble-defect was analyzed.Linear energy density (E=P/v) was introduced as synthetic parameter.According to analysis and test verification, the optimum technological parameters of 316L stainless steel were laser power 190-210KW, laser speed 800-1000mm/s and scanning interval 0.9-0.11mm,and the linear energy density was about 200J/m. There were no cracks, no bubbles, a small amount of porosity, and the product density reached 99.7%.

scholarly journals A Compact Review of Laser Welding Technologies for Amorphous Alloys

Metals ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1690
Author(s):  
Jian Qiao ◽  
Peng Yu ◽  
Yanxiong Wu ◽  
Taixi Chen ◽  
Yixin Du ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Laser Welding ◽  
Amorphous Alloys ◽  
High Energy ◽  
Industrial Applications ◽  
High Energy Density ◽  
Current Status ◽  
Future Research ◽  
Technological Parameters ◽  
Fast Heating

Amorphous alloys have emerged as important materials for precision machinery, energy conversion, information processing, and aerospace components. This is due to their unique structure and excellent properties, including superior strength, high elasticity, and excellent corrosion resistance, which have attracted the attention of many researchers. However, the size of the amorphous alloy components remains limited, which affects industrial applications. Significant developments in connection with this technology are urgently needed. Laser welding represents an efficient welding method that uses a laser beam with high energy-density for heating. Laser welding has gradually become a research hotspot as a joining method for amorphous alloys due to its fast heating and cooling rates. In this compact review, the current status of research into amorphous-alloy laser welding technology is discussed, the influence of technological parameters and other welding conditions on welding quality is analyzed, and an outlook on future research and development is provided. This paper can serve as a useful reference for both fundamental research and engineering applications in this field.

Fiber Laser Welding of Noncombustible Magnesium Alloy

2008 ◽  
Vol 580-582 ◽  
pp. 479-482 ◽  
Author(s):  
Yuji Sakai ◽  
Kazuhiro Nakata ◽  
Takuya Tsumura ◽  
Mitsuji Ueda ◽  
Tomoyuki Ueyama ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Laser Welding ◽  
Fiber Laser ◽  
Vickers Hardness ◽  
Laser Power ◽  
Welded Joint ◽  
Welding Process ◽  
Fiber Laser Welding ◽  
Laser Welding Process

Noncombustible magnesium alloy AMC602 (Mg-6mass%Al-2mass%Ca) extruded sheet of 2.0mm thickness was successfully welded using a fiber laser welding process at welding speed of 10m/min at 3kW laser power. Tensile strength of the welded joint was about 82 to 88% of that of the base metal. Vickers hardness, tensile strength and micro structural properties are also discussed.

EXPERIMENTAL RESEARCH OF PARTIAL REGULAR MICRORELIEFS FORMED ON ROTARY BODY FACE SURFACES

Aviation ◽  
2021 ◽  
Vol 25 (4) ◽  
pp. 268-277
Author(s):  
Volodymyr Dzyura ◽  
Pavlo Maruschak ◽  
Stoyan Slavov ◽  
Diyan Dimitrov ◽  
Dimka Vasileva
Keyword(s):  
Stochastic Models ◽  
Feed Rate ◽  
Processing Parameters ◽  
Response Surfaces ◽  
Cnc Milling ◽  
Natural Form ◽  
Face Surface ◽  
Contour Plots ◽  
Full Factorial Experimental Design ◽  
Full Factorial

The basic regularities in the influence of processing parameters on the geometrical characteristics of the partially regular microreliefs, formed on the rotary body face surface, are established. Combinations of partially regular microreliefs are formed by using a contemporary CNC milling machine, and an advanced programing method, based on previously developed mathematical models. Full factorial experimental design is carried out, which consist of three factors, varied on three levels. Regression stochastic models in coded and natural form, which give the relations between the width of the grooves and the deforming force, feed rate and the pitch of the axial grooves, are derived as a result. Response surfaces and contour plots are built in order to facilitate the results analysis. Based on the dependencies of the derived regression stochastic models, it is found that the greatest impact on the width of the grooves has the magnitude of the deforming force,followed by the feed rate. Also, it is found that the axial pitch between adjacent toolpaths has the least impact on the width of the grooves. As a result of the full-factorial experiment, the average geometric parameters of the microrelief grooves were obtained on their basis. When used, these values will provide for the required value of the relative burnishing area of the surface with regular microreliefs, and, accordingly, the specified operational properties.

Principles of exposure of polymer materials to heat, moisture and UV-radiation and study of their properties by full factorial experiment: A review

2021 ◽  
pp. 146-160
Author(s):  
A. B. Laptev ◽  
A. S. Nesterov ◽  
A. M. Vardanyan ◽  
A. M. Vardanyan
Keyword(s):  
Uv Radiation ◽  
Climatic Factors ◽  
Initial Period ◽  
Amorphous State ◽  
Surface Oxidation ◽  
Polymer Chains ◽  
Factorial Experiment ◽  
Polymer Materials ◽  
Full Factorial Experiment ◽  
Full Factorial

The work is dedicated to the effects of climatic factors on polyethylene terephthalate (PET) in terms of changes in the structure and interaction of polymer molecules. The kinetic concept of the strength of PET has been developed, and the factors influencing the strength have been considered. Effects of moisture, thermal oxidative destruction, and UV-radiation on the structure of PET have been investigated. Polymers’ properties predicting, durability and their computer modeling have been analyzed. A model of changes in PET properties under the influence of temperature, moisture and UV-radiation was constructed using the methods of a full factorial experiment. It has been shown that in the initial period of exposure, adsorption and diffusion of moisture, hydrolysis and surface oxidation occur; prolonged and constant exposure to UV-radiation break the bonds formed by moisture, then the C–C and C–O bonds in the PET molecule brake and new intermolecular bonds are formed. In the amorphous state of PET, the breaking of bonds in the polymer chain and the formation of bonds between two adjacent polymer chains, the formation of more densely packed nodes, the destruction of the polymer and its aging, are equally probable. Temperature has a secondary effect, facilitating both hydrolysis and oxidation and polymer degradation.

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