David M. Bastidas
University of Akron
Analytical chemistryMortarNuclear chemistryComposite materialX-ray photoelectron spectroscopyInorganic chemistryChemistryMetallurgyMaterials scienceCorrosionCarbon steelRebarChloridePortland cementReinforced concreteChemical engineeringElectrochemistryCopperDielectric spectroscopyAustenite
138Publications
22H-index
1,650Citations
Publications 115
Newest
#1David M. Bastidas (University of Akron)H-Index: 22
Last. Sebastián F. Medina (CSIC: Spanish National Research Council)H-Index: 25
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Abstract null null The premature causes of failure of ball joint heads attached to the weight bearing bar used on high speed trains, which were continuously under traction, have been studied, with an average load of 47.5 kN plus a cyclical load of ±7.5 kN. Ball joint heads made of C45 (AISI 1045) carbon steel show a pearlite microstructure (80–90 %) with ferrite surrounding the prior-austenite grain boundaries. Two different external elliptical-shaped fatigue cracks of 14.5 mm and 7.7 mm nucleat...
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#1Ulises Martin (University of Akron)H-Index: 3
#2Juan Bosch (University of Akron)H-Index: 3
Last. David M. Bastidas (University of Akron)H-Index: 22
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Abstract The corrosion behavior, semiconducting properties and chemical composition of the passive film formed on lean-duplex stainless steel LDSS 2001, LDSS 2304 and AISI 304 reinforcements embedded in OPC mortar containing chloride, 0, 0.4, 2 and 4 wt% Cl−; after 2.5 years were studied. The Ceff,film of LDSS 2001 remained constant at 3 × 10−5 F/cm2 for all Cl− concentrations. Flat-band potential, EFB,A, of LDSS 2001 increased with the Cl− concentration, suggesting a Cr2O3 film more prone to ac...
2 CitationsSource
#1David M. Bastidas (University of Akron)H-Index: 22
#2Nick Birbilis (ANU: Australian National University)H-Index: 83
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#1David M. Bastidas (University of Akron)H-Index: 22
Last. Sebastián F. Medina (CSIC: Spanish National Research Council)H-Index: 25
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Abstract Herein, a premature failure analysis of structural tempered high-strength boron steel 27MnCrB5–2 bolts (0.0006 wt. B), used for railcar wheel-axle assembly, is presented. Fractographic analysis revealed a moderate ductile fracture. The applied torque produced elongation of the bolt until final fracture. A scarce presence of precipitates was observed, mainly of Ti(C,N), TiC, and inclusions such as Al2O3 and MnS. The mechanical properties of the boron steel 27MnCrB5–2 bolts were 1112 and ...
1 CitationsSource
#1Ahmed Mohamed (University of Akron)
#2D. Visco (University of Akron)
Last. David M. Bastidas (University of Akron)H-Index: 22
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#1Juan Bosch Giner (University of Akron)
#2Ulises Martin (University of Akron)H-Index: 3
Last. David M. Bastidas (University of Akron)H-Index: 22
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Herein, the corrosion behavior of steel exposed to fly ash (FA) synthetic pore solution and carbonated FA synthetic pore solution is presented. A better understanding of corrosion phenomena of steel embedded in FA binder will be achieved if the corrosion mechanisms in the pore solution are disentangled. As such a more sustainable cementing material will be suitable for the construction industry. Electrochemical tests such as cyclic potentiodynamic curves (CPP) and electrochemical impedance spect...
#1Ulises Martin Diaz (University of Akron)
#2Juan Bosch (University of Akron)H-Index: 3
Last. David M. Bastidas (University of Akron)H-Index: 22
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The corrosion behavior, semiconducting properties and chemical composition of the passive film formed on lean-duplex stainless steel LDSS 2001, LDSS 2304 and AISI 304 reinforcements embedded in OPC mortar containing chloride, 0, 0.4, 2 and 4 wt.% Cl‒; after 2.5 years were studied. The Ceff,film of LDSS 2001 remained constant at 3×10‒5 F/cm2 for all Cl‒ concentrations. Flat-band potential, EFB,A, of LDSS 2001 increased with the Cl− concentration, suggesting a Cr2O3 film more prone to accept elect...
#1Jacob Ress (University of Akron)H-Index: 7
#2Ulises Martin Diaz (University of Akron)
Last. David M. Bastidas (University of Akron)H-Index: 22
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Colophony microcapsules synthesized by water in oil in water double emulsion containing NaNO2 corrosion inhibitors were investigated for controlled release in simulated concrete pore solutions. With high encapsulation efficiency of 83% measured by induced coupled plasma optical emission spectroscopy, the microcapsules were introduced to solutions of deionized water (pH 6.8), carbonate bicarbonate buffer solution (pH 9.1), and simulated concrete pore solution made of saturated calcium hydroxide (...
#1Juan BoschH-Index: 3
#2Ulises MartinH-Index: 3
Last. David M. BastidasH-Index: 22
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1 CitationsSource
#1M. V. Biezma (UC: University of Cantabria)H-Index: 13
#2Ulises Martin (University of Akron)H-Index: 3
Last. David M. Bastidas (University of Akron)H-Index: 22
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Abstract Sigma phase is a deleterious phase which can be formed in duplex stainless steels (DSSs) during heat treatment, manufacturing, or welding processes, leading to a decrease of mechanical properties and corrosion resistance. This issue is highly concerning for numerous industries because the presence of σ–phase in the austenite/ferrite microstructure of DSSs reduces their lifetime and promotes a brittle fracture in service. This review focuses on the non-destructive techniques (NDT) for th...
2 CitationsSource