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Metalurgia INTERNATIONAL (magazine set-up
in 1995) English version,
published by romanian metallurgical
foundation Honorary president
of scientific
publishing house f.m.r. Dr. ec. Lepădatu v. gheorghe
vol. XI (2006) no.3 romanian metallurgical foundation Scientific publishing house
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Honourary
Staff (in
alphabetical order) bensabra hakim
(algeria), chabour salem
(algeria), gencang yang
(china), R. I. IMRIŠ
(TECHNICAL |
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romanian metallurgical foundation Scientific publishing house scientific board staff Professor NICOLAE AVRAM
Ph. D. professor Scorţea
Costin Ph. D Managing Director: Editor-in-chief: Professor Scorţea
Costin Ph. D. editorial board: Prof. bejan Mircea Ph. D Prof. cănănău nicolae Ph. D Prof. GĂLUŞCĂ
DAN GELU Ph. D Prof. hepuţ teodor Ph. D Prof. TODERIŢA
NEMEŞ Ph. D Prof. MARIA
NICOLAE Ph. D Prof. Ripoşan Iulian Ph. D Prof. samoilă Corneliu Ph. D Prof. SCORŢEA
COSTIN Ph. D Prof. SIMITI IOAN VIDA Ph. D Prof. SOFONEA GALAFTION Ph. D Prof. Şaban Rami Ph. D Manager Scientific Publishing House F.M.R.: eng. Florentina
Brânduşa Scorţea |
Contents Issn
1582 – 2214 Drissen Peter: A
brief history of iron - and steel -slag in roadmaking ................................................................................................ 5 Agop Marcel, Vizureanu Petrică,
Găluşcă Dan-Gelu, Ioniţă Iulian: The self-organization of the plasma-plasma
interface as a double layer ........................................................................ 12 Ana
Veţeleanu, Ciociu Nicolae: The silver
covering of highly heat-proof plastics ...............................................................................
22 Căliman
Radu: Cycle fatigue life model for
particulate-reinforced metal-matrix composites .................................................... 27 GHIMBĂŞEANU Ioan: Computer-assisted simulation of a
thermocouple with PtRh-Pt thermoelement .................................................... 30 GeamĂn Virgil, Munteanu
Sorin Ion, Ciobanu Ioan, Crişan
Aurel: Recent advances in rapid hard tooling .................... 33 Chichernea
? FOSECO Turbostop system – reference list ................................. I - II ? Press release
........................................................................... III - VIII ? New books,
published by romanian metallurgical
foundation .............................................................................................. IX - X |
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abstract
metalurgia International
3/2006
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D.C.: 669. Drissen Peter: A brief history of iron - and steel -slag in
roadmaking Metalurgia
International (vol. XI), no.3, 2006, p. 5 The use of metallurgic slag as construction material
has a longstanding tradition as can be proved by historical findings and
revision of literature. With increasing industrialisation the use of these
materials was set on scientific and technical bedrock. Changes in the
production of iron and steel as well as increasing demands in civil
engineering have been a challenge for metallurgists and civil engineers. The
continuous efforts of both have contributed to today’s high quality of slag
products. The paper is a written version of a presentation held on the
DSU-Romania Seminar “LiDonit – un produs integral reciclabil in industria
constructiilor”, 26 – 27 January 2006. Key
words: the plasma Agop
Marcel, Vizureanu Petrică, Găluşcă Dan-Gelu,
Ioniţă Iulian: The
self-organization of the plasma-plasma interface as a double layer Metalurgia
International (vol. XI), no.3, 2006, p. 12 Using the finite differences method it is shown that
a diffusion equation can generate but not maintain a double layer (DL).
Instead of these, a reaction-diffusion equation system induces a Koch-type
fractal which leads to a self-organization scenario of plasma-plasma
interface as a DL. Using the Scale Relativity
Theory (SRT) it was shown that a plasma-plasma interface behaves as a
junction of Josephson type: a negative differential resistance is its
self-structuring condition, it has memory through hysterezis and work in two
oscillation regimes. This model is important in the surface phenomenon study. D.C.: 669.228 Key
words: chemical nickel plating, highly heat-proof plastics, surface coating Ana Veţeleanu, Ciociu Nicolae: The silver
covering of highly heat-proof plastics Metalurgia
International (vol. XI), no.3, 2006, p. 22 In the framework
of this research we have approached metallizing plastics by chemically
reducing the nickel. The aim of this research is to discover new technologies
of chemical metallization of highly heat-proof plastics, such as:
PEEK-polyetheretherketon and PSU-polysulfon, the results we have obtained
being used in order to extend the use of chemical metallization of the
insulating materials. In order to
obtain a comparison electrode Ag/AgCl, for use in the chemical industry, the
deposition of the silver upon a
nickel conducting film is necessary. With the help of the potentiostatic
chlorination, the deposited silver layer forms AgCl at the surface, this way
the combination Ag/AgCl may be obtained and remains stable in various
chemical media. |
D.C.: 669.018.25 Key
words: particulate-reinforced
metal-matrix composite; aluminium alloy; cycle fatigue Căliman Radu: Cycle fatigue life model for particulate-reinforced
metal-matrix composites Metalurgia
International (vol. XI), no.3, 2006, p. 27 A cycle fatigue life prediction model for
particulate-reinforced metal-matrix composites (MMCs) is presented. The cycle
fatigue behaviour of particulate-reinforced MMCs is treated as a localised
damage development phenomenon activated by applied cyclic loading. The
localised cyclic stress and strain concentration and fatigue damage evolution
of microstructural elements within the fatigue damaged zone ahead of the
crack tip are considered to dominate the whole cycle fatigue processes. D.C.: 536.532 GHIMBĂŞEANU
Ioan: Computer-assisted simulation of a thermocouple with
PtRh-Pt thermoelement Metalurgia
International (vol. XI), no.3, 2006, p. 30 The paper
presents the computer-assisted simulation of a thermocouple with PtRh-Pt
thermoelement. The thermocouple simulation is made through the LabVIEW
graphic programme, referring to the data tables provided by the AICHELIN
furnace constructions company in D.C.: 669.14.018.25 Key
words: RESEARCH INTERESTS:
Technology and equipment for hot plastic deformation of metals, Isostatic
processing of materials (P/M, casting, wood, etc), Advanced Materials and
Technologies (Rapid Prototyping, Microforming, Nanomaterials, Composite
Materials etc.) GeamĂn Virgil,
Munteanu Sorin Ion, Ciobanu Ioan, Crişan Aurel: Recent advances
in rapid hard tooling Metalurgia
International (vol. XI), no.3, 2006, p. 33 Early in the
development of stereo lithography (SL) it was clear that this revolutionary
technology could be applied to numerous aspects of the manufacturing process. The paper
presents a new way for improving a rapid hard tooling technology. There are
presented few new data about this technology. D.C.: 621.744.072 Key
words: foundry equipment, crusher,
3D modelling Chichernea Metalurgia
International (vol. XI), no.3, 2006, p. 37 Going beyond classical design models of equipment in
general and foundry equipment in particular may lead to a spectacular leap in this field. This
dose not imply the complete elimination of what has been achieved to date,
but a continuation of the stage of classical design by applying modern 3D computer aided design methods. Currently, give the large range of available 3D modelling and
designing software, the work of the designing engineer can reach 80-90%
efficiency, with results close to realty. |