Search Results - "de Almeida, L.H."

Microstructural changes caused by yttrium addition to NbTi-modified centrifugally cast HP-type stainless steels by Nunes, F.C., de Almeida, L.H., Dille, J., Delplancke, J.-L., Le May, I.

“…Centrifugally cast heat-resistant HP stainless steels are particularly suitable for applications where service conditions comprise high temperatures and…”
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Characterization of a new beta titanium alloy, Ti–12Mo–3Nb, for biomedical applications by Gabriel, S.B., Panaino, J.V.P., Santos, I.D., Araujo, L.S., Mei, P.R., de Almeida, L.H., Nunes, C.A.

“…► This paper focused on the development of Ti–12Mo–3Nb alloy for it to be used as a bone substitute. ► The alloy show good mechanical properties and exhibit…”
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Yttrium addition to heat-resistant cast stainless steel by Nunes, F.C., Dille, J., Delplancke, J.-L., de Almeida, L.H.

“…Yttrium addition to HP-type (where H stands for heat-resistant and P is related to the Ni content) heat-resistant cast stainless steel resulted in increased…”
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Precipitation in 9Cr–1Mo steel after creep deformation by Furtado, H.C., de Almeida, L.H., Le May, I.

“…The carbides present after creep testing a 9Cr–1Mo steel at 566 °C over a range of stress levels giving rupture times of up to 7300 h have been characterized…”
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Lower temperatures mechanism of strain aging in carbon steels for drawn wires by Hämmerle, J.R, de Almeida, L.H, Monteiro, S.N

“…The mechanism of static strain aging in carbon steel for drawn wires is discussed. Pre-strained specimens were pulled in tension after aging times and…”
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Mechanistic Modeling of Dynamic Strain Aging in Austenitic Stainless Steels by de Almeida, L.H., Le May, I., Emygdio, P.R.O.

“…On the basis of experimental data from tensile testing and review of the literature, the mechanisms of dynamic strain aging (DSA) in austenitic stainless…”
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Transmission Electron Microscopy Characterization of a Nb Microalloyed Steel for Carburizing at High Temperatures by de Morais, R.F., Reguly, A., de Almeida, L.H.

“…The carbide particles in AISI 5115 steel modified with added 0.038 wt.% Nb were characterized by means of transmission electron microscopy after simulation of…”
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Oxidation assisted intergranular cracking under loading at dynamic strain aging temperatures in Inconel 718 superalloy by Rezende, M.C., Araújo, L.S., Gabriel, S.B., Dille, J., de Almeida, L.H.

“…•Mechanical properties are controlled by DSA, precipitation hardening and OAIC.•Between 600 and 700°C the critical strain for serrations increases with…”
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The influence of heat treatments on the corrosion behaviour of nickel-based alloy 718 by Valle, L.C.M., Santana, A.I.C., Rezende, M.C., Dille, J., Mattos, O.R., de Almeida, L.H.

“…The corrosion resistance of the nickel-based alloy 718 in chloride environment depends on its microstructure and the influence of the different phases is still…”
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Hydrogen embrittlement in nickel-based superalloy 718: Relationship between γ′ + γ″ precipitation and the fracture mode by Rezende, M.C., Araujo, L.S., Gabriel, S.B., dos Santos, D.S., de Almeida, L.H.

“…The present work studies the influence of different metallurgical conditions on the hydrogen embrittlement of the nickel-based superalloy 718. The interaction…”
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Hydrogen embrittlement of a hard chromium plated cylinder assembly by Araujo, L.S., de Almeida, L.H., dos Santos, D.S.

“…Plating of high strength steels with a hard chromium layer is widely used in applications where wear and corrosion resistant surfaces are a requisite, with a…”
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Corrosion resistance of aged Ti–Mo–Nb alloys for biomedical applications by de Almeida, L.H., Bastos, I.N., Santos, I.D., Dutra, A.J.B., Nunes, C.A., Gabriel, S.B.

“…•The work presents the electrochemical behavior of aged Ti–Mo–Nb alloys.•Among the alloys, the Ti–10Mo–20Nb alloy showed to be more resistant to corrosion.•The…”
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Microstructural evolution during aging at 800°C and its effect on the magnetic behavior of UNS S32304 lean duplex stainless steel by Dille, J., Areiza, M.C.L., Tavares, S.S.M., Pereira, G.R., De Almeida, L.H., Rebello, J.M.A.

“…Duplex stainless steels are high strength and corrosion resistant alloys extensively used in chemical and petrochemical industries. However, exposition to…”
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Evaluation of electric and magnetic signals in heat-resistant HP alloys using scanning probe microscopy by Arenas, M.P., Pacheco, C.J., Fonseca, A.B., Queiroz, F.S., Gaudencio, M., Eckstein, C.B., Nogueira, L., De Almeida, L.H., Rebello, J.M.A., Nysten, B., Pereira, G.R.

“…•Samples with different chemical composition showed the same behavior in relation to their magnetic response.•Samples with aging state I exhibits magnetic…”
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Anelastic relaxation due to hydrogen in Ti–35Nb–7Zr–5Ta alloy by de Almeida, L.H., Caram, R., Moreno-Gobbi, A.O., Grandini, C.R.

“…► Mechanical spectroscopy measurements in Ti–35Nb–7Zr–5Ta alloys with hydrogen. ► Two relaxation structures: low temperature associated with hydrogen; high…”
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Setting of commercial glass ionomer cement Fuji IX by 27 Al and 19 F MAS-NMR by Munhoz, Tais, Karpukhina, Natalia, Hill, Robert G, Law, Robert V, De Almeida, L.H

“…To investigate the long term setting reaction in the glass ionomer restorative, Fuji IX, by monitoring the structural evolution of aluminium and fluorine…”
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Setting of commercial glass ionomer cement Fuji IX by 27Al and 19F MAS-NMR by Munhoz, Tais, Karpukhina, Natalia, Hill, Robert G., Law, Robert V., De Almeida, L.H.

“…To investigate the long term setting reaction in the glass ionomer restorative, Fuji IX, by monitoring the structural evolution of aluminium and fluorine…”
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Setting of commercial glass ionomer cement Fuji IX by27 Al and19 F MAS-NMR by Munhoz, Tais, Karpukhina, Natalia, Hill, Robert G, Law, Robert V, De Almeida, L.H

“…Abstract Objectives To investigate the long term setting reaction in the glass ionomer restorative, Fuji IX, by monitoring the structural evolution of…”
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Stress induced ordering due interstitials in Nb–4.7at.%Ta by de Almeida, L.H., Grandini, C.R., Machado, J.P.B., Rodrigues, D.

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Quantitative observations of precipitation in 2.25Cr–1Mo steel exposed to different creep conditions in a power station by de Lima, C.R., Pinto, A.L., Furtado, H.C., de Almeida, L.H., de Souza, M.F.P., Le May, I.

“…Samples of 2.25Cr–1Mo steel in the form of tubes have been examined in the new condition and after extended service in a power station. The differences in…”
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