In situ monitoring of direct laser metal deposition of a nickel-based superalloy using infrared thermography

2020 ◽  
Vol 112 (1-2) ◽  
pp. 157-173
Author(s):  
Marco Mazzarisi ◽  
Sabina Luisa Campanelli ◽  
Andrea Angelastro ◽  
Fania Palano ◽  
Michele Dassisti
Keyword(s):  
Infrared Thermography ◽  
Metal Deposition ◽  
In Situ Monitoring ◽  
Laser Metal Deposition ◽  
Nickel Based Superalloy ◽  
Direct Laser ◽  
Direct Laser Metal Deposition

scholarly journals In-situ Monitoring and Defect Detection for Laser Metal Deposition by Using Infrared Thermography

2016 ◽  
Vol 83 ◽  
pp. 1244-1252 ◽  
Author(s):  
Ulf Hassler ◽  
Daniel Gruber ◽  
Oliver Hentschel ◽  
Frank Sukowski ◽  
Tobias Grulich ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Defect Detection ◽  
Metal Deposition ◽  
In Situ Monitoring ◽  
Laser Metal Deposition

scholarly journals Ultrasonic Characterization of Components Manufactured by Direct Laser Metal Deposition

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2658
Author(s):  
Anna Castellano ◽  
Marco Mazzarisi ◽  
Sabina Luisa Campanelli ◽  
Andrea Angelastro ◽  
Aguinaldo Fraddosio ◽  
...  
Keyword(s):  
Microstructural Analysis ◽  
Deposition Process ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Nickel Based Superalloy ◽  
Ultrasonic Characterization ◽  
Direct Laser ◽  
New Material ◽  
Direct Laser Metal Deposition

Direct laser metal deposition (DLMD) is an innovative additive technology becoming of key importance in the field of repairing applications for industrial and aeronautical components. The performance of the repaired components is highly related to the intrinsic presence of defects, such as cracks, porosity, excess of dilution or debonding between clad and substrate. Usually, the quality of depositions is evaluated through destructive tests and microstructural analysis. Clearly, such methodologies are inapplicable in-process or on repaired components. The proposed work aims to evaluate the capability of ultrasonic techniques to perform the mechanical characterization of additive manufactured (AM) components. The tested specimens were manufactured by DLMD using a nickel-based superalloy deposited on an AISI 304 substrate. Ultrasonic goniometric immersion tests were performed in order to mechanical characterize the substrate and the new material obtained by AM process, consisting of the substrate and the deposition. Furthermore, the relationship was evaluated between the acoustic and the mechanical properties of the AM components and the deposition process parameters and the geometrical characteristics of multiclad depositions, respectively. Finally, the effectiveness of the proposed non-destructive experimental approach for the characterization of the created deposition anomalies has been investigated.

Analysis of Process Parameters about Direct Laser Metal Deposition Shaping Process of Titanium Alloys Based on Logistic Regression Model

2011 ◽  
Vol 38 (11) ◽  
pp. 1103005 ◽  
Author(s):  
孔源 Kong Yuan ◽  
刘伟军 Liu Weijun ◽  
王越超 Wang Yuechao ◽  
王靖震 Wang Jingzhen ◽  
杨光 Yang Guang
Keyword(s):  
Logistic Regression ◽  
Regression Model ◽  
Titanium Alloys ◽  
Process Parameters ◽  
Logistic Regression Model ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Shaping Process ◽  
Direct Laser ◽  
Direct Laser Metal Deposition

scholarly journals A monitoring framework based on exergetic analysis for sustainability assessment of direct laser metal deposition process

2021 ◽  
Author(s):  
Valeria Selicati ◽  
Marco Mazzarisi ◽  
Francesco Saverio Lovecchio ◽  
Maria Grazia Guerra ◽  
Sabina Luisa Campanelli ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Sustainability Assessment ◽  
Metal Deposition ◽  
Process Efficiency ◽  
Laser Metal Deposition ◽  
Sustainable Solutions ◽  
Direct Laser ◽  
Monitoring Framework ◽  
Exergetic Analysis ◽  
Direct Laser Metal Deposition

Abstract With the constant increase of energy costs and environmental impacts, improving the process efficiency is considered a priority issue for the manufacturing field. A wide knowledge about materials, energy, machinery, and auxiliary equipment is required in order to optimize the overall performance of manufacturing processes. Sustainability needs to be assessed in order to find an optimal compromise between technical quality of products and environmental compatibility of processes. In this new Industry 4.0 era, innovative manufacturing technologies, as the additive manufacturing, are taking a predominant role. The aim of this work is to give an insight into how thermodynamic laws contribute at the same time to improve energy efficiency of manufacturing resources and to provide a methodological support to move towards a smart and sustainable additive process. In this context, a fundamental step is the proper design of a sensing and real-time monitoring framework of an additive manufacturing process. This framework should be based on an accurate modelling of the physical phenomena and technological aspects of the considered process, taking into account all the sustainability requirements. To this end, a thermodynamic model for the direct laser metal deposition (DLMD) process was proposed as a test case. Finally, an exergetic analysis was conducted on a prototype DLMD system to validate the effectiveness of an ad-hoc monitoring system and highlight the limitations of this process. What emerged is that the proposed framework provided significant advantages, since it represents a valuable approach for finding suitable process management strategies to identify sustainable solutions for innovative manufacturing procedures.

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