The Experts below are selected from a list of 3933 Experts worldwide ranked by ideXlab platform
Fatih Toptan - One of the best experts on this subject based on the ideXlab platform.
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corrosion and tribocorrosion behaviour of ti6al4v produced by selective laser melting and hot pressing in comparison with the Commercial Alloy
Journal of Materials Processing Technology, 2019Co-Authors: Fatih Toptan, A C Alves, O Carvalho, F Bartolomeu, A M P Pinto, F S Silva, G MirandaAbstract:Abstract The corrosion and tribocorrosion behaviour of SLM-produced Ti6Al4V Alloy was studied in comparison with its HP and Commercial counterparts in 9 g/L NaCl solution at body temperature. Results showed that SLM processing route influenced the electrochemical response of the SLM-produced Alloy by leading to a relatively lower quality for the passive film due to decreased β phase and the formation of α′ phase. However, after tribocorrosion, neither the total volume loss nor the volume loss under the influence of mechanical wear and wear-accelerated corrosion showed any statistically significant difference between the processing routes.
G Miranda - One of the best experts on this subject based on the ideXlab platform.
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corrosion and tribocorrosion behaviour of ti6al4v produced by selective laser melting and hot pressing in comparison with the Commercial Alloy
Journal of Materials Processing Technology, 2019Co-Authors: Fatih Toptan, A C Alves, O Carvalho, F Bartolomeu, A M P Pinto, F S Silva, G MirandaAbstract:Abstract The corrosion and tribocorrosion behaviour of SLM-produced Ti6Al4V Alloy was studied in comparison with its HP and Commercial counterparts in 9 g/L NaCl solution at body temperature. Results showed that SLM processing route influenced the electrochemical response of the SLM-produced Alloy by leading to a relatively lower quality for the passive film due to decreased β phase and the formation of α′ phase. However, after tribocorrosion, neither the total volume loss nor the volume loss under the influence of mechanical wear and wear-accelerated corrosion showed any statistically significant difference between the processing routes.
S S Bhattacharya - One of the best experts on this subject based on the ideXlab platform.
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model for grain boundary sliding and its relevance to optimal structural superplasticity part 3 effect of flow localisation and specimen thickness on superplasticity in Alloy supral 100
Materials Science and Technology, 1996Co-Authors: Valentynovych Viacheslav Astanin, K. A. Padmanabhan, S S BhattacharyaAbstract:AbstractThe effect of flow localisation and specimen thickness on the superplastic deformation of the Commercial Alloy Suprall 100 (Al–6Cu) is discussed. Optimal flow was accompanied by the formation and spread of intense ‘shear bands’ along grain/interphase boundaries. The spacing between the shear bands depended on both the strain rate of deformation and the specimen thickness. Superplasticity drastically decreased when the specimen thickness fell below about 10 grain diameters. The apparent activation volume was afunction of strain rate but was independent of specimen thickness, while the strain rate sensitivity index depended on both the strain rate and specimen thickness. The results are explained in terms of the theory that as well as being influenced by specimen geometry, the degree of superplasticity depends on the extent to which cooperative boundary sliding and boundary shear band formation are present during flow.MST/3076
L L Meisner - One of the best experts on this subject based on the ideXlab platform.
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effect of inclusions on cratering behavior in tini shape memory Alloys irradiated with a low energy high current electron beam
Surface & Coatings Technology, 2016Co-Authors: L L Meisner, A B Markov, D I Proskurovsky, V P Rotshtein, G E Ozur, S N Meisner, Evgeny YakovlevAbstract:Abstract Irradiation of TiNi shape memory Alloys with a microsecond low-energy (10–30 keV), high-current (10–25 kA) electron beam in surface melting modes induces microcrater formation, which limits the practical use of this method of surface modification. Potential centers of crater formation are inclusions, which are inherent to TiNi Alloys. However, there is limited information about their role in crater formation and the nature of this phenomenon as applied to TiNi Alloys. In this paper, the microstructural identification of inclusions was carried out in Commercial (VIM) and precision TiNi Alloys using TEM/SAED/EDS methods. The topographical features of microcraters formed by a single-pulse irradiation of TiNi samples near the surface melting threshold of the B2 matrix phase were identified. It was found by SEM/EDS-analysis, that microcraters are mainly nucleated on titanium oxycarbide TiC(O) (Commercial Alloy) and oxide Ti 4 Ni 2 O (precision Alloy) inclusions; in both cases, the central region of microcraters is enriched with oxygen. The role of gradient capillary forces in the melt mass transfer (Marangoni effect), which determine the formation of microcraters, was analyzed. It was shown that thermocapillary forces play an insignificant role, while chemicapillary forces induced by decreasing a surface tension of the melt due to its oxygen enrichment can be sufficiently large to produce microcraters.
Jacques Huot - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen storage in Ti–Mn–(FeV) BCC Alloys
Journal of Alloys and Compounds, 2009Co-Authors: S F Santos, Jacques HuotAbstract:Abstract Recently, the replacement of vanadium by the less expensive (FeV) Commercial Alloy has been investigated in Ti–Cr–V BCC solid solutions and promising results were reported. In the present work, this approach of using (FeV) Alloys is adopted to synthesize Alloys of the Ti–Mn–V system. Compared to the V-containing Alloys, the Alloys containing (FeV) have a smaller hydrogen storage capacity but a larger reversible hydrogen storage capacity, which is caused by the increase of the plateau pressure of desorption. Correlations between the structure and the hydrogen storage properties of the Alloys are also discussed.