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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
(2006)
no.8 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. S.
HOUK (S.U.A.), I. IMRI (TECHNICAL
UNIVERSITY OF KOICE,
SLOVAK REPUBLIC), pușici miho (Slovenia), roșescu gheorghe
(grecia), roxana ruxandra
(california), w.m. nicola
(tri. state university angola, indiana, s.u.a.), xianqing you (china) |
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editorial
board : Prof. colan horia Ph. D., member of Romanian Academy of
Technical Sciences Prof. Coșmeleață georgeta Ph. D. Prof.
Dumitrescu Constantin Ph. D., deputy member of
Romanian Academy of Technical Science Prof. French David Ph. D., CSIRO Energy Technology, Australia Prof. Gălușcă Dan-Gelu Ph. D. Prof.
Mihaela Grigore Ph. D., University of New
South Wales, Sydney, Australia Prof. Lawson Cristopher Ph. D., Copenhague Technical Institute, Denmark Prof. Nicolae Avram Ph. D. Prof. Maria Nicolae Ph. D. Prof.
doc. Oprea Florea Ph. D., member of Romanian
Academy of Technical Sciences Prof.
Veena Sahajwalla Ph. D., University of New South Wales, Sydney, Australia Prof. Sakurovs Richard Ph. D.,
CSIRO Energy Technology, Australia Prof. Salvo Luc Ph. D., Grenoble National Politechnical
Institute, France Prof. Saiter Jean-Marc Ph. D., Rouen University, France Prof. Scorțea Costin Ph. D. Prof. Simiti Ioan Vida Ph. D. Prof.
Sofroni Laurenție Ph. D., member of
Romanian Academy of Technical Sciences Prof. Șaban Rami Ph. D Prof. ȘTEFĂNESCU DORU Ph. D, Ohio State University Columbus, S.U.A. advisory board : Prof. bejan Mircea Ph. D Prof. cănănău nicolae Ph. D Prof. hepuț teodor Ph. D Prof. TODERIȚA
NEMEȘ Ph. D Prof. Doina Răducanu Ph. D Prof. Ripoșan Iulian Ph. D Prof. samoilă Corneliu
Ph. D Prof. SOFONEA GALAgTION
Ph. D Managing Director: Editor-in-chief: Professor Scorțea
Costin Ph. D. Manager Scientific Publishing House F.M.R.: eng. Florentina
Brândușa Scorțea |
Contents Issn 1582 2214 Florentina Potecașu, Potecașu Octavian: The temperature
influence on mechanical
characteristics of materials hardened
through deformation
. 5 Vasile Lazar, Nistor Liviu: Compaction pressure,
determinant factor in obtaining superior mechanical characteristics in the production
of powder
metals pieces
....
9 Ciobanu Ioan, Mașniță Mihai, Monescu Vlad: Analytical determination of the casting solidification
time and solidification constant
..
.. 15 Carmen Otilia RUSĂNESCU, BRĂILOIU Mircea, RUSĂNESCU
Marin, IORDĂNESCU Traian: Microalloyed steels with vanadium by teste of torsion
.
.... 29 Batalu Dan, Georgeta Coșmeleață, Aloman Angel: Critical analysis of Al-Ni phase diagrams
.. 37 ? FOSECO
Turbostop system reference list
I-II ? Invitation
....
..
........... III IV ? New books,
published by romanian metallurgical
foundation
.
...
..
..... V - VI |
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abstract
metalurgia International 8/2006
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D.C.: 669. Key
words: aluminium,
hardening, recrystallization, resistance Florentina Potecașu, Potecașu Octavian: The temperature influence on mechanical
characteristics of materials hardened through deformation Metalurgia International (vol. XI), no.8, 2006, p.
5 The
paper presents the annealing influence of temperature on phenomena that take
place whenheating at different temperatures, for aluminium samples hardened
through dispersion with fine particles, hard, stable.
D.C.: 669. Key
words: powder metals, mechanical
characteristics, plasticity Vasile Lazar, Nistor
Liviu: Compaction pressure, determinant factor in obtaining
superior mechanical characteristics in the production of powder metals pieces Metalurgia International (vol. XI), no.8, 2006, p.
9 The enlargement of engineering powder metal
application field depends on the integrating possibility of sintered porous
pieces in mechanical structures of resistance that operates in complex
tension states and variable strains conditions. The acquaintance of influence
for different parameters, which characterize metal powder, on mechanical
properties that are
directly connected on tests
appliance on an object is the problem of heist importance in founding
the optimal technological solution. The paper presents experiments on
mechanical tests (tensile resistance, elongation, hardness) of plasticity and
dimensions changes evolution, for two types of powder (Ancorsteel 2000 and
Ancorsteel 4600 V) in able to make possible |
their
implementation in the fabrication of pieces constituting different
equipments. D.C.: 621.746.628 Ciobanu Ioan, Mașniță
Mihai, Monescu Vlad: Analytical determination of the casting
solidification time and solidification constant Metalurgia International (vol. XI), no.8, 2006, p.
15 Starting from the Stephan Swartz equation
of the temperature field from the mould it is established an analytical
relations for calculation of the solidification time and solidification
constant of the castings dependent on the thermophysical characteristics of
the alloy, of the mould and pouring conditions. It is verified the validity
of this relations by comparison the results obtained with it, with those
obtained by computer solidification simulation for a case of a plate poured
from eutectic grey cast iron. It is analysed the pouring temperature
influence over the solidification time and solidification constant determined
by those two methods, and results interpretation. D.C.: 669. Key words: activation energy, microalloyed steels, parameter
Zenner Hollomon Carmen Otilia RUSĂNESCU, BRĂILOIU Mircea, RUSĂNESCU
Marin, IORDĂNESCU Traian: Microalloyed steels with vanadium by
teste of torsion Metalurgia International (vol. XI), no.8, 2006, p.
29 The present paper studies the influence of the
microalloy on the characteristics of the some steel classes destined to the
execution of the petroleum tubes. Added to the realization
of high report between the resistance characteristics and tenaciousness by
using the fine granulation there can be obtained the rising of the capacity
to weld of the steel, by reducing the content in carbon in order to realize
the same level of resistance at breaking. The torsion at hot
temperature was used as trial for a reference steel and for the steel to be
studied. D.C.: 620.193. Batalu Dan, Georgeta Coșmeleață, Aloman Angel: Critical analysis of Al-Ni phase diagrams Metalurgia International (vol. XI), no.8, 2006, p.
37 In the present paper the authors critically
analyze some experimental and calculated phase diagrams, suggest a schema of
the Al-Ni binary phase diagram (BPD) and establish its corresponding flow
diagram. The results are important for
pointing out a reliable Al-Ni BPD and for indicating new directions of
research for Al-Ni BPD, in order to clarify the related controversies. The
results are also important for building and analysing ternary phase diagrams
in which the Al-Ni BPD is part of. |
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