scholarly journals Optimization of Direct Energy Deposition of 304L Stainless Steel through Laser Process Parameters

2021 ◽  
Author(s):  
SeongSeon Shin ◽  
Sung-Min Kwon ◽  
ChiYen Kim ◽  
JongHoon Lee ◽  
JunHo Hwang Hwang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Process Parameters ◽  
Energy Deposition ◽  
304L Stainless Steel ◽  
Direct Energy Deposition ◽  
Laser Process ◽  
Direct Energy

scholarly journals Investigation of hybrid manufacturing of stainless steel 316L components using direct energy deposition

2020 ◽  
pp. 095440542094936 ◽  
Author(s):  
Nikolaos Tapoglou ◽  
Joseph Clulow
Keyword(s):  
Stainless Steel ◽  
Energy Deposition ◽  
Hybrid Manufacturing ◽  
Stainless Steel 316L ◽  
Direct Energy Deposition ◽  
Direct Energy ◽  
Finish Machine ◽  
Metallic Parts ◽  
Non Destructive

Direct energy deposition has been established as one of the methods for additive manufacturing metallic parts. The combination of direct energy deposition capabilities with traditional machining centre capabilities has enabled over the past few years the creation of hybrid manufacturing cells that are able to additively manufacture and finish machine components under one platform. This article investigates the production of geometries using a hybrid, additive and subtractive approach. The parameters for depositing stainless steel 316L are initially investigated followed by an assessment of machinability of the additively manufactured material. Finally, the quality of the deposited and machined material was thoroughly examined with a series of destructive and non-destructive methods.

Repairing additive-manufactured 316L stainless steel using direct energy deposition

2019 ◽  
Vol 117 ◽  
pp. 6-17 ◽  
Author(s):  
Wook Jin Oh ◽  
Wook Jin Lee ◽  
Min Seob Kim ◽  
Jong Bae Jeon ◽  
Do Sik Shim
Keyword(s):  
Stainless Steel ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
Direct Energy Deposition ◽  
Direct Energy

An Overview of Metallic Materials Fabrication by Direct Energy Deposition

2021 ◽  
Vol 882 ◽  
pp. 11-20
Author(s):  
P. Azhagarsamy ◽  
K. Sekar ◽  
K.P. Murali
Keyword(s):  
Stainless Steel ◽  
Nickel Alloys ◽  
Energy Deposition ◽  
Functionally Graded ◽  
Research Progress ◽  
Metallic Materials ◽  
Related Factors ◽  
Direct Energy Deposition ◽  
Advantages And Disadvantages ◽  
Direct Energy

Laser-based Direct Energy Deposition (L-DED) is a very quick and freeform fabrication process. L-DED is useful to fabricate near net shape for engineering applications as well as medical applications. L-DED has been successful in making a variety of pure metals and its alloys for industrial needs. This review paper gives an overview of the research progress in various types of metallic materials like nickel alloys, Stainless Steel (SS), and Functionally Graded Materials (FGMs) fabricated by L-DED. Simultaneously, the effects of process parametric related factors also discussed. Introduction about nickel alloys, Stainless Steel, and FGMs relevant findings, and their advantages and disadvantages for these alloys are communicated. The paper shows the metallurgical, mechanical properties, and post-processing effects on L-DED fabricated nickel alloys, SS, and FGMs. This paper will be helpful to the researchers and industrialists and for those who are interested to do research in this field.

scholarly journals The influence of key process parameters on melt pool geometry in direct energy deposition additive manufacturing systems

2021 ◽  
Vol 134 ◽  
pp. 106609
Author(s):  
Robert Sampson ◽  
Robert Lancaster ◽  
Mark Sutcliffe ◽  
David Carswell ◽  
Carl Hauser ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Manufacturing Systems ◽  
Energy Deposition ◽  
Direct Energy Deposition ◽  
Melt Pool ◽  
Direct Energy

Laser Direct Energy Deposition Welding of AISI 316 Stainless Steel Sheets

2019 ◽  
Author(s):  
Alessandro Ascari ◽  
Alessandro Fortunato ◽  
Erica Liverani ◽  
Adrian H. A. Lutey
Keyword(s):  
Stainless Steel ◽  
Energy Deposition ◽  
Rapid Development ◽  
Lap Joints ◽  
Weld Bead ◽  
Main Process ◽  
Direct Energy Deposition ◽  
Steel Sheets ◽  
Wide Range ◽  
Direct Energy

Abstract The present paper assesses the applicability of laser powder direct energy deposition for welding of thin stainless steel sheets. Considering the rapid development of laser cladding and relatively wide range of equipment available in modern industrial settings, this technology can also be applied to laser welding, where the procedure is performed with a filler material comprising blown powder. To this end, an exhaustive experimental campaign has been carried out with the aim of evaluating the influence of the main process parameters, including laser power and powder feed rate, on the resulting weld bead characteristics. Two joint configurations have also been considered to assess the best solution in terms of both chamfer shape and sheet positioning. Butt and lap joints were prepared, with 30° and 45° V-groove configurations tested and characterized in the former case. In order to assess the resulting weld quality, metallographic analyses were carried out to measure the main morphological parameters of the weld beads, including width, penetration depth and reinforcement, and to evaluate the possible presence of defects such as pores, cracks or lack of melting. Tensile tests were also carried out with the purpose of characterizing the overall mechanical performance of the joints. These tests demonstrated good overall process feasibility and highlighted the fact that lap joints and 30° V-groove butt joints were the best configurations in terms of both weld bead quality and fused zone morphology.

scholarly journals Influence of Direct Energy Deposition Parameters on Ti–6Al–4V Component’s Structure-Property Homogeneity

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 887
Author(s):  
Chan Hyeok Lee ◽  
P. L. Narayana ◽  
Seong-Woo Choi ◽  
N. S. Reddy ◽  
Jae H. Kim ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Process Parameters ◽  
Energy Deposition ◽  
Mechanical Characteristics ◽  
Structure Property ◽  
Ann Model ◽  
Direct Energy Deposition ◽  
Specific Strength ◽  
Direct Energy ◽  
Artificial Neural Network Ann

Ti–6Al–4V alloy is a typical 3D printing metal, and its application has been expanded to various fields owing to its excellent characteristics such as high specific strength, high corrosion resistance, and biocompatibility. In particular, direct energy deposition (DED) has been actively explored in the fields of deposition and the repair of large titanium parts. However, owing to the complicated thermal history of the DED process, the microstructures of the fusion zone (FZ), heat-affected zone (HAZ), and base metal (BM) are different, which results in variations of their mechanical characteristics. Therefore, the process reliability needs to be optimized. In this study, the microstructure and hardness of each region were investigated with respect to various DED process parameters. An artificial neural network (ANN) model was used to correlate the measured characteristics of the FZ, HAZ, and BM of Ti–6Al–4V components with the process parameters. The variation in the mechanical characteristics between the FZ, HAZ, and BM was minimized through post-heat treatment. Heat treatment carried out at 950 °C for 1 h revealed that the microstructure and hardness values throughout the component were homogeneous.

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