Characterization of copper–nickel alloys fabricated using laser metal deposition and blended powder feedstocks

The use of the Laser Metal Deposition (LMD) technology as a manufacturing and repairing technique in industrial sectors like the die and mold and aerospace is increasing within the last decades. Research carried out in the field of LMD process situates argon as the most usual inert gas, followed by nitrogen. Some leading companies have started to use helium and argon as carrier and shielding gas, respectively. There is therefore a pressing need to know how the use of different gases may affect the LMD process due there being a lack of knowledge with regard to gas mixtures. The aim of the present work is to evaluate the influence of a mixture of argon and helium on the LMD process by analyzing single tracks of deposited material. For this purpose, special attention is paid to the melt pool temperature, as well as to the characterization of the deposited clads. The increment of helium concentration in the gases of the LMD processes based on argon will have three effects. The first one is a slight reduction of the height of the clads. Second, an increase of the temperature of the melt pool. Last, smaller wet angles are obtained for higher helium concentrations.

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Additively Manufactured Al/SiC Cylindrical Structures by Laser Metal Deposition

Materials ◽

10.3390/ma13153331 ◽

2020 ◽

Vol 13 (15) ◽

pp. 3331 ◽

Cited By ~ 1

Author(s):

Ainhoa Riquelme ◽

Pilar Rodrigo ◽

María Dolores Escalera-Rodríguez ◽

Joaquín Rams

Keyword(s):

Wear Resistance ◽

Powder Metallurgy ◽

Wear Behavior ◽

Metal Deposition ◽

Fabrication Process ◽

Laser Metal Deposition ◽

Composite Matrix ◽

Cylindrical Structures ◽

Preliminary Characterization

Preliminary characterization of the microstructure of Al/SiCp composites prepared by Laser Metal Deposition (LMD) was analyzed, and the microhardness and wear behavior of the materials manufactured have been evaluated. It has been determined that the combined effect of the laser speed and power is decisive for the fabrication process. The microstructure characterization shows that the presence of hygroscopic Al4C3 can be avoided by adding Ti to the composite matrix. The wear behavior of the LMD samples and their microhardness have been compared with Powder Metallurgy samples with the same composition. The LMD samples showed higher hardness and wear resistance.

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Characterization of the corrosion layer of copper-nickel alloys in a synthetic sweat medium by FTMS and LAMMA laser microprobes

Applied Surface Science ◽

10.1016/s0169-4332(97)00400-5 ◽

1998 ◽

Vol 125 (1) ◽

pp. 29-45 ◽

Cited By ~ 15

Author(s):

S. Colin ◽

G. Krier ◽

H. Jolibois ◽

A. Hachimi ◽

J.F. Muller ◽

...

Keyword(s):

Nickel Alloys ◽

Corrosion Layer ◽

Copper Nickel

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Fabrication and Characterization of AlxCrCuFeNi2 High-Entropy Alloys Coatings by Laser Metal Deposition

Procedia Manufacturing ◽

10.1016/j.promfg.2020.01.408 ◽

2019 ◽

Vol 39 ◽

pp. 509-518 ◽

Cited By ~ 2

Author(s):

Wenyuan Cui ◽

Xinchang Zhang ◽

Lan Li ◽

Yitao Chen ◽

Tan Pan ◽

...

Keyword(s):

Metal Deposition ◽

High Entropy Alloys ◽

Laser Metal Deposition ◽

High Entropy ◽

Fabrication And Characterization

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Fabrication and Characterization of AlxCoFeNiCu1−x High Entropy Alloys by Laser Metal Deposition

Coatings ◽

10.3390/coatings7040047 ◽

2017 ◽

Vol 7 (4) ◽

pp. 47 ◽

Cited By ~ 11

Author(s):

Xueyang Chen ◽

Lei Yan ◽

Sreekar Karnati ◽

Yunlu Zhang ◽

Frank Liou

Keyword(s):

Metal Deposition ◽

High Entropy Alloys ◽

Laser Metal Deposition ◽

High Entropy ◽

Fabrication And Characterization

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Ultrasonic Characterization of Components Manufactured by Direct Laser Metal Deposition

Materials ◽

10.3390/ma13112658 ◽

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.

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