scholarly journals Additively Manufactured Al/SiC Cylindrical Structures by Laser Metal Deposition

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3331 ◽  
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.

Wear Behavior and Structural Characterization of a Nitrogen Implanted Ti6Al4V Alloy at Different Temperatures

1983 ◽  
Vol 27 ◽  
Author(s):  
R. Martinella ◽  
G. Chevallard ◽  
C. Tosello
Keyword(s):  
Wear Resistance ◽  
Structural Characterization ◽  
Wear Behavior ◽  
Hardened Layer ◽  
Structural Modifications ◽  
Theory Comparison ◽  
Different Temperatures ◽  
Nitrogen Ions ◽  
Wear Tests

ABSTRACTMechanically polished Ti6Al4V samples were implanted with 100 key nitrogen ions to a fluence of 5.1017 ions/cm2 at two different bulk tenneratures: 370°C and 470°C. Wear tests were carried out with a reciprocating slidina tribotester. Structural modifications and wear morphologies were studied by TEM and SEM. 370°C implanted sample showed the same wear behavior as unimplanted ones, while 470°C implanted sample showed better wear resistance because of a TiN hardened layer. Correlations- between microstructural modifications, wear behavior and mechanisms are reported: results agree with the delamination theory. Comparison with ion- and gas-nitrided samples are presented.

scholarly journals Study of the Influence of Shielding Gases on Laser Metal Deposition of Inconel 718 Superalloy

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1388 ◽  
Author(s):  
Jose Ruiz ◽  
Magdalena Cortina ◽  
Jon Arrizubieta ◽  
Aitzol Lamikiz
Keyword(s):  
Metal Deposition ◽  
Slight Reduction ◽  
Laser Metal Deposition ◽  
Melt Pool ◽  
Industrial Sectors ◽  
Inconel 718 Superalloy ◽  
Melt Pool Temperature ◽  
Different Gases ◽  
Die And Mold

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.

Dry Sliding Wear Behavior of the Reinforced by Graphite Particle and Heat Treated of Recycled Aluminum AA6061 Based MMC Fabricated by Powder Metallurgy Method

2017 ◽  
Vol 740 ◽  
pp. 9-16
Author(s):  
Ahmed Sahib Mahdi ◽  
Mohammad Sukri Mustapa ◽  
Mahmod Abd Hakim Mohamad ◽  
Abdul Latif M. Tobi ◽  
Muhammad Irfan Ab Kadir ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Powder Metallurgy ◽  
Compression Strength ◽  
Sliding Wear ◽  
Wear Behavior ◽  
High Wear Resistance ◽  
Dry Sliding Wear ◽  
Powder Metallurgy Method ◽  
Heat Treated ◽  
Improvement Ratio

The micro-hardness and compression of recycling aluminum alloy AA6061 were investigated as a function of the different microstructure and constituent powder metallurgy method. Five specimens were selected to investigate the compression strength and microhardness. The first, as fabricated specimen (as compacted), the second was as heat treated by quenching and aging process. Three specimens were mixed with Graphite particles as a reinforcement material. Compression strength values were tested for the specimens as fabricated and heat treated which were 195 and 300 MPa, respectively. The improvement ratio was 52% for the specimen as heat treated. On the other hand, high wear resistance was given by the specimen as heat treated, whereas, the lower wear strength was at the specimen mixed with 4.5% Graphite. These results were attributed to that the wear resistance related to the microhardness value.

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

2019 ◽  
Vol 39 ◽  
pp. 509-518 ◽  
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

Influence of laser metal deposition direction in the abrasive and adhesive wear resistance of Ni-Cr-B-Si coatings

2020 ◽  
Vol 32 (2) ◽  
pp. 022045
Author(s):  
Jurandir Marcos Sá de Sousa ◽  
Adriano de Souza Pinto Pereira ◽  
Milton Pereira ◽  
Rafael Gomes Nunes Silva
Keyword(s):  
Wear Resistance ◽  
Adhesive Wear ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Deposition Direction

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

Coatings ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 47 ◽  
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

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.

Microstructural and mechanical characterization of Ti6Al4V refurbished parts obtained by laser metal deposition

2015 ◽  
Vol 643 ◽  
pp. 64-71 ◽  
Author(s):  
Ramesh Raju ◽  
Muthukannan Duraiselvam ◽  
Vijay Petley ◽  
Shweta Verma ◽  
R. Rajendran
Keyword(s):  
Mechanical Characterization ◽  
Metal Deposition ◽  
Laser Metal Deposition
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