scholarly journals Effect of Process Parameters on Deposition Properties of Functionally Graded STS 316/Fe Manufactured by Laser Direct Metal Deposition

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 607 ◽  
Author(s):  
Sangwoo Nam ◽  
Heewon Cho ◽  
Cheolhee Kim ◽  
Young-Min Kim
Keyword(s):  
Energy Dispersive Spectrometer ◽  
Functionally Graded ◽  
Functional Material ◽  
Feeding Condition ◽  
Mixed Powder ◽  
Graded Materials ◽  
Direct Energy Deposition ◽  
Eds Analysis ◽  
Direct Energy ◽  
Stainless Steel 316

Stainless steel 316 (STS316)/Fe functionally graded materials were fabricated by direct energy deposition (DED) method using laser as a heat source. The feeding amount of the mixed powder was evaluated and the powder feeding condition was optimized through the section evaluation. The reliability of the powder feed was evaluated by regression analysis, and it was confirmed through the energy dispersive spectrometer (EDS) analysis and X-ray diffractometer (XRD) that the graded functional material of the designed composition was manufactured. Defects and microstructures were analyzed by scanning electron microscope (SEM).

scholarly journals Analytical Evaluation of the Dendritic Structure Parameters and Crystallization Rate of Laser-Deposited Cu-Fe Functionally Graded Materials

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5665
Author(s):  
Konstantin Makarenko ◽  
Oleg Dubinin ◽  
Igor Shishkovsky
Keyword(s):  
Functionally Graded Materials ◽  
Dendritic Structure ◽  
Crystallization Rate ◽  
Functionally Graded ◽  
Aluminum Bronze ◽  
Graded Materials ◽  
Direct Energy Deposition ◽  
Direct Energy ◽  
Concentrated Source ◽  
Experimental Values

The paper is devoted to the direct energy deposition (DED) of functionally graded materials (FGMs) created from stainless steel and aluminum bronze with 10% content of Al and 1% of Fe. The results of the microstructure analysis using scanning electronic microscopy (SEM) demonstrate the existence of a dendritic structure in the specimens. The crystallization rate of the gradient binary Cu-Fe system structures was investigated and calculated using the model of a fast-moving concentrated source with an ellipsoid crystallization front. The width of the secondary elements of the dendrites in the crystallized slab was numerically estimated as 0.2 nm at the center point of the circle heat spot, and the two types of dendrites were predicted in the specimen: the dendrites from 0.2 to approximately 50 nm and from approximately 0.1 to 0.3 μm in width of the secondary elements. The results were found to be in good accordance with the measured experimental values of the dendritic structure geometry parameters.

Effects of Particle Size on Fabrication of Al-TiO2 Functionally Graded Materials by Centrifugal Mixed-Powder Method

2016 ◽  
Vol 879 ◽  
pp. 1691-1697 ◽  
Author(s):  
Hisashi Sato ◽  
Junya Maeda ◽  
Motoko Yamada ◽  
Yoshimi Watanabe
Keyword(s):  
Particle Size ◽  
Wear Resistance ◽  
Functionally Graded Materials ◽  
Casting Process ◽  
Functionally Graded ◽  
The Other ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method ◽  
Al Matrix

As one of processing methods of functionally graded materials (FGMs), centrifugal mixed-powder method has been proposed. The centrifugal mixed-powder method is the casting process combined of centrifugal casting and powder metallurgy. This processing method has advantage that fine ceramics-particles, whose wettability with matrix melt is low, can be compounded into metallic material. However, effects of particle size on microstructure and mechanical properties of the FGMs fabricated by the centrifugal mixed-powder method are unclear. In this study, two kinds of Al-TiO2 FGMs rings are fabricated by the centrifugal mixed-powder method. One contains TiO2 particles having similar diameter with Al matrix particles (hereafter, small different-size (SD) TiO2 particles), and the other one compounds TiO2 particles with much smaller diameter than Al matrix particles (hereafter, large different-size (LD) TiO2 particles). In case of the Al-TiO2 FGMs ring containing SD-TiO2 particles, the TiO2 particles are homogeneously dispersed in Al matrix on outer surface of the ring. On the other hand, the TiO2 particles in the Al-TiO2 FGMs ring with LD-TiO2 particles are distributed along grain boundary of Al matrix. Moreover, Vickers-hardness and wear resistance around outer surface of the Al-TiO2 FGMs ring containing the SD-TiO2 particles is higher than that of the Al-TiO2 FGMs ring with LD-TiO2 particles. Since Al particles in the mixed-powder with LD-TiO2 particles are surrounded by the TiO2 particles, the Al particles can be hardly melted by heat of molten Al at casting process. As a result, the Al-TiO2 FGMs ring with LD-TiO2 particles has low hardness and wear resistance. Therefore, it is found that TiO2 particles having similar diameter with Al matrix particles are more suitable for fabrication of the Al-TiO2 FGMs rings.

scholarly journals A Novel Fabrication Method for Functionally Graded Materials under Centrifugal Force: The Centrifugal Mixed-Powder Method

Materials ◽  
2009 ◽  
Vol 2 (4) ◽  
pp. 2510-2525 ◽  
Author(s):  
Yoshimi Watanabe ◽  
Yoshifumi Inaguma ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara
Keyword(s):  
Centrifugal Force ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Fabrication Method ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

Fabrication of Al/Al3Ti Functionally Graded Materials by Reaction Centrifugal Mixed-Powder Method

2011 ◽  
Vol 50 ◽  
pp. 01AJ02 ◽  
Author(s):  
Shimaa El-Hadad ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Yoshimi Watanabe
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method

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.

Fabrication of Al/Al3Ti Functionally Graded Materials by Reaction Centrifugal Mixed-Powder Method

2011 ◽  
Vol 50 (1S1) ◽  
pp. 01AJ02 ◽  
Author(s):  
Shimaa El-Hadad ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara ◽  
Yoshimi Watanabe
Keyword(s):  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Mixed Powder ◽  
Graded Materials ◽  
Powder Method
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