Juan Pablo Sanhueza

Juan Pablo Sanhueza
University of Concepción · Departamento de Ingeniería de Materiales

Doctor of Philosophy in Materials Science and Engineering

About

32
Publications
2,907
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
255
Citations

Publications

Publications (32)
Article
Nucleation, growth and coarsening of three different precipitates (NbC, M23C6 and V(C,N)) in a novel 9%Cr heat resistant steel designed by the authors were investigated. The microstructure evolution after tempering (780 °C/2 h) and after creep (650 °C/100 MPa) was characterized using transmission electron microscopy in the scanning mode (STEM). The...
Article
The precipitation kinetics of secondary phases in a 10.5%Cr heat resistant steel, designed by the authors, was studied experimentally and theoretically. Experimental data of nucleation, growth and coarsening stages for M23C6 carbides, V-MX, Nb-MX and Laves phase were obtained by HRTEM-characterization on samples after tempering (780°C/2h) and isoth...
Article
A 12 pct Cr martensitic/ferritic steel was designed and produced to study Laves and Z-phase as precipitation hardening particles under creep conditions (650 °C). According to thermodynamic calculations, W and Cu additions were selected to ensure the precipitation of Laves after tempering. It is known that Z-phase formation does not follow the class...
Article
In this work, a Super Austenitic Stainless Steel is designed supported by Thermo‐Calc modeling and produced at open atmosphere induction furnace, based on 254SMO (UNSS31254). The technological challenge of this work is to prevent the sensitization of the alloy, due to its high C content (0.072%). The chemical composition includes 0.25%Nb and 2.2%Mn...
Article
The effect of B and W in the precipitation kinetic of M23C6 carbides in martensitic/ferritic steels were studied assisted by ThermoCalc and TC-PRISMA. The simulation predicts that B has low solubility in the austenitic and ferritic matrix, thus promoting the formation of M2B borides and (Cr,Fe)23(C,B)6 carbides. Furthermore, calculation carried out...
Article
Technological advancements have consistently been accompanied by significant progress in materials science, with alloys serving as fundamental elements in engineering design. However, due to emerging demands of industry, these alloys face limitations forcing materials scientists to design new alloys and understand their phenomenological behavior. T...
Article
Full-text available
Antifouling coatings containing biocidal agents can be used to prevent the accumulation of biotic deposits on submerged surfaces; however, several commercial biocides can negatively affect the ecosystem. In this study, various formulations of a potential biocide product comprising copper nanoparticles and capsaicin supported on zeolite ZSM-5 were a...
Article
Full-text available
The development of high-entropy alloys has been hampered by the challenge of effectively and verifiably predicting phases using predictive methods for functional design. This study validates remarkable phase prediction capability in complex multicomponent alloys by microstructurally predicting two novel high-entropy alloys in the FCC + BCC and FCC...
Article
Full-text available
In this study, were extensively reviewed the hardening and self-healing properties of Laves-phase in Fe-based alloys. First, the microstructural features of different polytypes of the Laves-phase, focusing on the thermodynamics and kinetics of formation in ferritic and martensitic steels were revised. C14 was identified as the dominant polytype in...
Article
Full-text available
Aluminum and its alloys are very versatile materials used in a wide range of applications due to the initial characteristics of pure aluminum and the combination of properties obtained from its blend with other elements. Considering that aluminum is the second-most-produced metal after steel, and that its production will increase over time based on...
Article
Full-text available
Citation: Oñate, Á.; Torres, E.; Olave, D.; Ramírez, J.; Medina, C.; Sanhueza, J.P.; Melendrez, M.; Tuninetti, V.; Rojas, D. Exploring the Impact of Cooling Rate on Microstructural Features, Mechanical Properties, and Corrosion Resistance of a Novel Nb-Stabilized Super Duplex Stainless Steel in Shielded Metal Arc Welding. Abstract: The corrosion an...
Article
Isothermal heat treatments below the martensite start temperature are carried out in a 0.25C‐1.4Mn‐1.4Si‐0.32Mo steel (in wt%). The microstructural observation reveals a combination of tempered lath and plate martensite, accompanied by bainite and retained austenite. The temperature variation of the austenitic carbon content under different constra...
Article
In this study, three martensitic creep-resistant steels with 100, 90, and 70ppm of boron were investigated. The experimental data obtained from isothermal aging and creep test at 650°C were compared with the results of simulation conducted using TC-PRISMA software. Tungsten was found to be the rate-controlling element in the coarsening of (Cr, Fe,...
Article
With the purpose of improving the protection of steel ASTM A36 from corrosion, in this paper the use of tannin as an inhibitor was studied by incorporating it in an epoxy resin along with zinc oxide nanoparticles functionalized with 3-aminopropyltriethoxysilane (APTES) in concentrations of 1, 3, and 5%w/w. Electrochemical techniques such as polariz...
Article
Poly(butylene adipate‐co‐terephthalate) (PBAT) was mixed with copper nanoparticles (Cu‐NPs) in concentrations of 1%, 3%, and 5% with particle size between 100 nm and 200 nm by the melting method. A morphological, thermal, and structural characterization of the nanocomposites (NCs‐PBAT/Cu) was performed to analyze the effect of the Cu‐NPs on the pol...
Article
A 12% Cr martensitic/ferritic with tailor-made microstructure was characterized by HRTEM after tempering (780ºC/2 h) and isothermal aging at 650ºC during 2 months and 1 year. The investigation was focused on the precipitation behavior of Laves phase nanoparticles and its contribution to creep response at 650ºC. Although, dense precipitation of Lave...

Network

Cited By