scholarly journals Analysis of the Process Parameter Influence in Laser Cladding of 316L Stainless Steel

2018 ◽  
Vol 2 (3) ◽  
pp. 55 ◽  
Author(s):  
Piera Alvarez ◽  
M. Montealegre ◽  
Jose Pulido-Jiménez ◽  
Jon Arrizubieta
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Process Parameters ◽  
Cross Sections ◽  
316L Stainless Steel ◽  
Deposition Process ◽  
Process Parameter ◽  
Optimum Process ◽  
Processing Times ◽  
Manufacturing Technologies

Laser Cladding is one of the leading processes within Additive Manufacturing technologies, which has concentrated a considerable amount of effort on its development. In regard to the latter, the current study aims to summarize the influence of the most relevant process parameters in the laser cladding processing of single and compound volumes (solid forms) made from AISI 316L stainless steel powders and using a coaxial nozzle for their deposition. Process speed, applied laser power and powder flow are considered to be the main variables affecting the laser cladding in single clads, whereas overlap percentage and overlapping strategy also become relevant when dealing with multiple clads. By setting appropriate values for each process parameter, the main goal of this paper is to develop a processing window in which a good metallurgical bond between the delivered powder and the substrate is obtained, trying simultaneously to maintain processing times at their lowest value possible. Conventional metallography techniques were performed on the cross sections of the laser tracks to measure the effective dimensions of clads, height and width, as well as the resulting dilution value. Besides the influence of the overlap between contiguous clads and layers, physical defects such as porosity and cracks were also evaluated. Optimum process parameters to maximize productivity were defined as 13 mm/s, 2500 W, 30% of overlap and a 25 g/min powder feed rate.

scholarly journals Analysis of the Process Parameter Influence in Laser Cladding of 316L Stainless Steel

2018 ◽  
Author(s):  
Piera Alvarez ◽  
M. Ángeles Montealegre ◽  
Jose F. Pulido-Jiménez ◽  
Jon I. Arrizubieta
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
Cross Sections ◽  
316L Stainless Steel ◽  
Deposition Process ◽  
Process Parameter ◽  
Processing Times ◽  
Effective Dimensions ◽  
Important Amount ◽  
Manufacturing Technologies

Laser Cladding is one of the leading processes within Additive Manufacturing technologies, a fact which has concentrated an important amount of effort on its development. In regard to the latter, the current study aims to summarize the influence of the most relevant process parameters in the laser cladding processing of single and compound volumes (solid forms) made from AISI 316L stainless steel powders and using a coaxial nozzle for deposition. Process speed, applied laser power and powder flow are considered to be the main variables affecting laser cladding in single clads, meanwhile overlap percentage and overlapping strategy become also relevant when dealing with multiple clads. By means of setting appropriate values of each process parameter, the main goal of this paper is to develop a processing window in which a good metallurgical bond between the delivered powder and substrate is obtained, trying simultaneously to maintain processing times in their lowest value possible. Conventional metallography techniques were performed on the cross sections of the laser tracks to measure the effective dimensions of clads for dilution analysis, height and width for the values of overlap between contiguous clads and layers, and also to analyze them for physical defects such as porosity and cracks. The resulting solid piece was 8 mm high at 800 mm/min.

Cracking Mechanism of Laser Cladding Rapid Manufacturing 316L Stainless Steel

2009 ◽  
Vol 419-420 ◽  
pp. 413-416 ◽  
Author(s):  
Jian Li Song ◽  
Yong Tang Li ◽  
Qi Lin Deng ◽  
Zhong Yang Cheng ◽  
Bryan Chin
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
316L Stainless Steel ◽  
Deposition Process ◽  
Liquid Films ◽  
Manufacturing Technology ◽  
Protective Atmosphere ◽  
Rapid Manufacturing ◽  
Cracking Behavior ◽  
Cracking Mechanism

Laser cladding rapid manufacturing technology is a kind of new developed advanced manufacturing technology integrating the advantages of rapid prototyping manufacturing and laser cladding surface modification. Due to the complex thermo-physical and metallurgical factors in the deposition process, the cladding layer is liable to crack, which seriously impedes the industrial application of this technology. Experiments of laser cladding rapid manufacturing 316L stainless steel were carried out. The cracking behavior and phenomena has been observed, cracking mechanism of 316L stainless steel was investigated by means of microstructure characterization and phase analysis with optical microscopy (OM), X-Ray diffraction (XRD), scan electronic microscopy (SEM) and phase diagram analysis. Factors influencing the cracking susceptibility has also been studied. Results show that the cracks of 316L stainless steel were hot solidification cracks caused by the high residual stress and separating of the liquid films among dendrites. Through the optimization of process parameters, adding protective atmosphere, etc. cracking sensitivity has been effectively reduced and crack free 316L stainless steel components have been obtained.

scholarly journals Joining of SiO2 glass and 316L stainless steel using Bi–Ag-based active solders

2020 ◽  
Vol 56 (4) ◽  
pp. 3444-3454
Author(s):  
Felix Weber ◽  
Markus Rettenmayr
Keyword(s):  
Stainless Steel ◽  
Cross Sections ◽  
316L Stainless Steel ◽  
Dissimilar Materials ◽  
Intermetallic Phases ◽  
Reaction Products ◽  
Cast State ◽  
Metallic Component ◽  
X Ray ◽  
Solder Interface

Abstract Active brazing is a commonly used method for joining dissimilar materials with at least one non-metallic component. In the present study, joining of SiO2 glass to 316L stainless steel was performed utilizing Bi–Ag-based solders. Ti up to a concentration of 4 and Mg up to 1 wt.% were added as active elements. Microstructures of the solder alloys in the as-cast state and of cross sections of the joined compounds were analysed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. In the as-cast state of the solder, Ti is found in Bi–Ti intermetallic phases; Mg is partially dissolved in the fcc-(Ag) phase and additionally contained in a ternary Ag-Bi-Mg phase. After soldering, a tight joint was generated using several alloy compositions. Ti leads to the formation of reaction products at the steel/solder and glass/solder interfaces, and Mg is exclusively accumulated at the glass/solder interface.

Effects of process parameters, debinding and sintering on the microstructure of 316L stainless steel produced by binder jetting

2021 ◽  
pp. 142108
Author(s):  
Nora Lecis ◽  
Marco Mariani ◽  
Ruben Beltrami ◽  
Lorena Emanuelli ◽  
Riccardo Casati ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Process Parameters ◽  
316L Stainless Steel ◽  
Binder Jetting

scholarly journals Dispersion Behaviors of Y2O3Particles Into Aisi 316L Stainless Steel by Using Laser Cladding Technology

2013 ◽  
Vol 20 (4) ◽  
pp. 269-274 ◽  
Author(s):  
Eun-Kwang Park ◽  
Sung-Mo Hong ◽  
Jin-Ju Park ◽  
Min-Ku Lee ◽  
Chang-Kyu Rhee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Laser Cladding ◽  
316L Stainless Steel ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel

Simulation and Analysis of the Temperature Field in Laser Cladding 316L Stainless Steel

2015 ◽  
Vol 42 (s1) ◽  
pp. s103002
Author(s):  
刘娟 Liu Juan ◽  
罗开玉 Luo Kaiyu ◽  
景祥 Jing Xiang ◽  
鲁金忠 Lu Jinzhong
Keyword(s):  
Stainless Steel ◽  
Temperature Field ◽  
Laser Cladding ◽  
316L Stainless Steel

scholarly journals Influence of Scanning Strategy Parameters on Residual Stress in the SLM Process According to the Bridge Curvature Method for AISI 316L Stainless Steel

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1659 ◽  
Author(s):  
Jiri Hajnys ◽  
Marek Pagáč ◽  
Jakub Měsíček ◽  
Jana Petru ◽  
Mariusz Król
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Process Parameters ◽  
316L Stainless Steel ◽  
Stress Generation ◽  
Aisi 316L ◽  
Laser Melting ◽  
Scanning Strategy ◽  
Aisi 316L Stainless Steel ◽  
Strategy Parameters

The present paper deals with the investigation and comparison of the influence of scanning strategy on residual stress in the selective laser melting (SLM) process. For the purpose of the experiment, bridge geometry samples were printed by a 3D metal printer, which exhibited tension after cutting from the substrate, slightly bending the samples toward the laser melting direction. Samples were produced with the variation of process parameters and with a change in scanning strategy which plays a major role in stress generation. It was evaluated using the Bridge Curvature Method (BCM) and optical microscopy. At the end, a recommendation was made.

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