1,720,963 research outputs found
Aluminium based protective coatings produced on AISI 304 stainless. Journ. de Phys. IV 3,877-880 ,
No full textThe diffision of Aluminium is one of the most promising methods to build superficial coatings for stainless
steel protection.
Heat treatments at 800 OC performed on rods of AISI 304 steel, Aluminium coated by means of
electrodeposition, displayed the possibility of forming intermetallic compounds. Depending on the
duration of the heat treatment and on the cooling kinetics, these compounds can be continuous.
At high cooling kinetics (water cooling) a two-phase structure composed of y' (Ni3Al) and y
(substitutional solid solution) is obtained.
At slow cooling rates (in furnace), a substitutional solid solution and some precipitates of y' (Ni3Al) and
p (NiAl) can be observed.
At intermediate cooling rates (oil cooling and air cooling), only the substitutional solution and the y' phase
are present.
Using furnace cooling from 800 OC until 500 OC, permanence at this temperature for I92 h and cooling
furnace, the two-phase structure obtained is composed of the substitutional solid solution and the j3 (NiAl)
phase.
The existence of these phases and their composition have been reported by X-ray diffraction patterns and
microanalysis.
The possibility of forming a natural composite, constituted by a hard phase of aluminides diffised in a
substitutional solid solution, has an important consequence on the mechanical and protection properties of
these coatings. Moreover, the diffusion of Al improves the adhesion of coatings
Various Form os Stress Corrosion in AISI 316 Austenitic Stailess Steel, Met. Sci. and Techn.
No full textInfluence of the steel/molten-zinc reaction kinetics on thickness, constitution and morphology of reinforced concrete galvannealed bars.
No full textComposition and structural modifications to the Al/AISI 316L sintered steel interface induced by heat treatments.
No full textA study of the phases formed during a heat treatment of an aluminium coating on AISI 310 and AISI 316 stainless steels, 4th European Conference on Advanced Materials and Processes.
No full text
Indagine diagnostica non invasiva al Palazzo Vescovile di Frascati: un approccio integrato
Full text linkUn’indagine diagnostica si è svolta al Palazzo Vescovile di Frascati mediante l’applicazione di un approccio integrato che ha coinvolto differenti tecniche non invasive. Un sistema LIF (Laser Induced Fluorescence) a scansione ha lavorato in sinergia con lo strumento RGB-ITR ( Red Green Blue – Imaging Topological Radar) 3D laser scanner e la tecnica SfM (Structure from Motion) per la ricostruzione fotogrammetrica 3D. Il caso studio presentato in questo lavoro mostra come l’informazione multispettrale 3D può rivelare e localizzare precedenti azioni di restauro e processi di deterioramento a supporto della conservazione, della ricerca e a scopo di disseminazione.Laser artistic surfaces at the Bishop’s Palace of Frascati have been investigated by an integrated approach involving different non-invasive diagnostic techniques. A LIF (Laser Induced Fluorescence) scanning system worked in synergy with the RGB-ITR ((Red Green and Blue – Imaging Topological Radar) 3D laser scanner and the SfM (Structure from Motion) technique for the 3D photogrammetric reconstruction. The presented case study shows how 3D multispectral information can reveal and locate previous restoration actions and deterioration processes as support for conservation, research and dissemination purposes
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Contributo alla comprensione del meccanismo di aderenza dell'acciaio AISI 409 Alluminiato per marmitte catalitiche.
No full textShaking table tests of an arch-pillars system and design of strengthening by the use of tie-rods
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