Cerca
Items 1-10 di 19
Tribological Characteristics and Formation of Subsurface Structures of Cast FE-CR-C Alloys with Different Content of Copper, under Sliding Friction
(Universitatea ”Dunărea de Jos” din Galați, 2009)
Effect of copper contents (0%, 0.4%, and 14%) and modes of heat treatment on initial structure of Fe-Cr-C alloys (C~1.2%, Cr = 17…19%) and subsurface structure of friction layers and tribological characteristics of these ...
Particularities of Rubber Lip Seals Used for Pneumatic Linear Drives
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The paper presents some particular aspects of reciprocating rubber lip seals for pneumatic linear drives. This study is focused on the following tribological aspects: friction variation under linear velocity, determination ...
A Fast Numerical Method to Predict Elastic Fields due to Eigenstrains in an Isotropic Half-Space Part I: Algorithm Overview
(Universitatea ”Dunărea de Jos” din Galați, 2009)
A fast algorithm to predict elastic fields due to arbitrarily shaped eigenstrains in an elastic, isotropic half-space is advanced in this paper. The inclusion domain is partitioned in a set of cuboids of uniform eigenstrains, ...
Diffractometry Analysis on Non-Conventional Treated Steels after Tribological Tests
(Universitatea ”Dunărea de Jos” din Galați, 2009)
Two steel grades were subjected to a nitro-carburized thermo-chemical treatment after thermo-magnetic treatments. The contact was studied employing the concept of tribosystem and tribomodel. The structural aspects into ...
Estimation of the Operability Index of a Containership Operating in the Black Sea
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The calculation of the operability index, which represents the percentage of time during which the ship is operational, depends on the wave climate of the ocean area where the ship operates, the dynamic response of the ...
Steel on Silicon Nitride Hybrid Tribological Systems Lubricated by Kerosene. Tests on a fFour-Ball Machine
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The kerosene can be used not only as a fuel for jet engines, but also as lubricant of the various mechanisms of modern jet aircrafts and turbine helicopters [1]. In order to determine the wear resistance of hybrid ...
Aspects of Rheological Behavior of Rapeseed Oil
(Universitatea ”Dunărea de Jos” din Galați, 2009)
This paper presents a study of dynamic viscosity variation with shear rate for rapeseed oils obtained from different stages of processing and the hydraulic oil grade H32. For each of the 6 types of oils studied was determined ...
Sliding Indentation Behaviour of x 65 Hydrogenated Steel Grade
(Universitatea ”Dunărea de Jos” din Galați, 2009)
The paper presents an experimental research on non-hydrogenated and hydrogenated X 65 steel samples. The steel was obtained from a continuous casting slab, this grade being used in petroleum industry. The hydrogen has an ...
The Behaviour of Two Non-Conventionally Treated Steels During Corrosion Process
(Universitatea ”Dunărea de Jos” din Galați, 2009)
This paper presents an analysis on two steel grades, subjected to nitriding thermo-chemical treatment after classic / thermo-magnetic treatments (in direct current/alternative current). It was estimated the durability of ...
Tribological Testing Programs for Uhmwpe Matrix Composites
(Universitatea ”Dunărea de Jos” din Galați, 2009)
This paper aims to review the knowledge on materials and tribology of the ultra high molecular weight polyethylene (UHMWPE) composites. The various mechanisms proposed for the wear behaviour of UHMWPE are closely associated ...