Jhon Alexander Villada

Dr. Jhon Alexander Villada

orcid

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 November 2017 in Journal of Food Engineering
Verified
Journal Article
Closed access
JVJhon Alexander Villada
Jhon Alexander Villada
FSF. Sánchez-Sinencio
F. Sánchez-Sinencio
OZO. Zelaya-Angel
O. Zelaya-Angel
EGE. Gutiérrez-Cortez
E. Gutiérrez-Cortez
MRMario Enrique Rodriguez-Garcia
Mario Enrique Rodriguez-Garcia

19 August 2021 in Journal of Materials Engineering and Performance
Verified
Journal Article
Closed access
PDF file
JFJulio Franco-Correa
Julio Franco-Correa
EME. Martínez-Franco
E. Martínez-Franco
JAJ. M. Alvarado-Orozco
J. M. Alvarado-Orozco
LCL. A. Cáceres-Díaz
L. A. Cáceres-Díaz
DED. G. Espinosa-Arbelaez
D. G. Espinosa-Arbelaez
JVJhon Alexander Villada
Jhon Alexander Villada

1 November 2008 in Physica B: Condensed Matter
Verified
Journal Article
Closed access
LTLiliana Tirado
Liliana Tirado
JVJhon Alexander Villada
Jhon Alexander Villada
MRM. de Los Ríos
M. de Los Ríos
JPJ.A. Peñafiel
J.A. Peñafiel
GFG. Fonthal
G. Fonthal
MRMario Enrique Rodriguez-Garcia
Mario Enrique Rodriguez-Garcia

28 March 2019 in Journal of Materials Engineering and Performance
Verified
Journal Article
Closed access
PDF file
JVJhon Alexander Villada
Jhon Alexander Villada
RBR. G. Bayro-Lazcano
R. G. Bayro-Lazcano
EME. Martinez-Franco
E. Martinez-Franco
DED. G. Espinosa-Arbelaez
D. G. Espinosa-Arbelaez
JGJ. Gonzalez-Hernandez
J. Gonzalez-Hernandez
JJuan Manuel Alvarado Orozco
Juan Manuel Alvarado Orozco

14 December 2022 in Metals
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Journal Article
Open access
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JSJuan Manuel Salgado
Juan Manuel Salgado
Enrique Martínez-FrancoEnrique Martínez-Franco
Enrique Martínez-Franco
CCCelso Cruz
Celso Cruz
JCJorge Corona Castuera
Jorge Corona Castuera
JVJhon Alexander Villada
Jhon Alexander Villada
The manufacture of cellular structures using high-performance materials is possible thanks to the additive manufacturing of metals. However, it is well known that the mechanical and microstructural properties of metals manufactured by this technique do not correspond to those of the same metals manufactured by conventional methods. It is well known that the mechanical properties depend on the direction of manufacture, the size of the pieces, and the type of cell structure used. In addition, the effect of heat treatments on parts manufactured by additive manufacturing differs from parts manufactured by conventional methods. In this work, the microstructure and microhardness of cellular structures of Inconel 718, manufactured by additive manufacturing under heat treatments with different aging times, were evaluated. It was found that the time of the first aging impacts the microhardness and its homogeneity, affecting the microstructure. The highest hardness was obtained for an aging time of 8 h, while the lowest standard deviation was obtained at 10 h. Finally, it is shown that the aging time influences a more homogeneous distribution of the elements and phases.

22 November 2023 in Materials
Verified
Journal Article
Open access
PDF file
JFJulio Franco-Correa
Julio Franco-Correa
Enrique Martínez-FrancoEnrique Martínez-Franco
Enrique Martínez-Franco
CCCelso Cruz
Celso Cruz
JSJuan Manuel Salgado
Juan Manuel Salgado
JVJhon Alexander Villada
Jhon Alexander Villada
Experimental and computational approaches were used to study the microstructure of IN718 produced via powder bed fusion additive manufacturing (PBF-AM). The presence, chemical composition, and distribution of stable and metastable phases (γ′′, δ, MC, and Laves) were also analyzed. The information obtained from the microstructural study was used to construct a tailored time–temperature transformation (TTT) diagram customized for additive manufacturing of IN718. Experimental techniques, including differential scanning calorimetry (DSC), scanning electron microscopy, energy dispersive X-ray spectroscopy, and electron backscatter diffraction (EBSD), were employed to establish the morphological, chemical, and structural characteristics of the microstructure. The Thermo-Calc software and a Scheil–Gulliver model were used to analyze the presence and behavior of phase transformations during heating and cooling processes under non-thermodynamic equilibrium conditions, typical of AM processes. Unlike conventional TTT diagrams of this alloy, the diagram presented here reveals that the precipitation of γ′′ and δ phases occurs at lower temperatures and shorter times in AM-manufactured parts. Significantly, the superposition of γ′′ and δ phase curves in the proposed diagram underscores the interdependence between these phases. This TTT diagram is a valuable insight that can help in the development of heat treatment processes and quality control for IN718 produced via PBF-AM.