Sohaciu Mirela | University Politehnica of Bucharest (original) (raw)
Uploads
Papers by Sohaciu Mirela
NEUMANN:STEELS O-BK, 2000
Key Engineering Materials, 2015
The paper presents the investigations made on samples taken from the related rotor blade of an ho... more The paper presents the investigations made on samples taken from the related rotor blade of an hospital cooling equipment.The failure analysis was made in order to find if the failure appear because the metallic material used or was functional problem.The objectives of our analysis and techniques used are described below:determining the chemical composition by optical emission spectrometry;determining the hardness of the material;metallographic analysis by optical microscopy;micro compositional and microstructural analysis by scanning electron microscopy (SEM) and by microanalysis, energy dispersive X-ray (EDAX). Research has highlighted the quality of piece elaboration and casting, which led to a long life of its use.
Key Engineering Materials, 2015
The paper presents the results of research conducted to determine the causes that led to the frac... more The paper presents the results of research conducted to determine the causes that led to the fracture of a motor shaft component from an electric surgical motor used in orthopedic surgery.The chemical and structural analysis emphasized a structure rich in complex silicate and sulfides inclusions. They form areas of weakness, acting like stress concentrators which induce fatigue shaft breakage. Their high density and non-uniform shape and distribution suggest a non-adequate technology of making and casting of steel, destinated to work in difficult conditions and having an important operational role.
Key Engineering Materials, 2015
The paper presents the results of research conducted to determine the causes that led to the frac... more The paper presents the results of research conducted to determine the causes that led to the fracture of a motor shaft component from an electric surgical motor used in orthopedic surgery.The chemical and structural analysis emphasized a structure rich in complex silicate and sulfides inclusions. They form areas of weakness, acting like stress concentrators which induce fatigue shaft breakage. Their high density and non-uniform shape and distribution suggest a non-adequate technology of making and casting of steel, destinated to work in difficult conditions and having an important operational role.
ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering., 2010
ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering., 2010
Key Engineering Materials, 2015
NEUMANN:STEELS O-BK, 2000
Key Engineering Materials, 2015
The paper presents the investigations made on samples taken from the related rotor blade of an ho... more The paper presents the investigations made on samples taken from the related rotor blade of an hospital cooling equipment.The failure analysis was made in order to find if the failure appear because the metallic material used or was functional problem.The objectives of our analysis and techniques used are described below:determining the chemical composition by optical emission spectrometry;determining the hardness of the material;metallographic analysis by optical microscopy;micro compositional and microstructural analysis by scanning electron microscopy (SEM) and by microanalysis, energy dispersive X-ray (EDAX). Research has highlighted the quality of piece elaboration and casting, which led to a long life of its use.
Key Engineering Materials, 2015
The paper presents the results of research conducted to determine the causes that led to the frac... more The paper presents the results of research conducted to determine the causes that led to the fracture of a motor shaft component from an electric surgical motor used in orthopedic surgery.The chemical and structural analysis emphasized a structure rich in complex silicate and sulfides inclusions. They form areas of weakness, acting like stress concentrators which induce fatigue shaft breakage. Their high density and non-uniform shape and distribution suggest a non-adequate technology of making and casting of steel, destinated to work in difficult conditions and having an important operational role.
Key Engineering Materials, 2015
The paper presents the results of research conducted to determine the causes that led to the frac... more The paper presents the results of research conducted to determine the causes that led to the fracture of a motor shaft component from an electric surgical motor used in orthopedic surgery.The chemical and structural analysis emphasized a structure rich in complex silicate and sulfides inclusions. They form areas of weakness, acting like stress concentrators which induce fatigue shaft breakage. Their high density and non-uniform shape and distribution suggest a non-adequate technology of making and casting of steel, destinated to work in difficult conditions and having an important operational role.
ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering., 2010
ANNALS OF THE ORADEA UNIVERSITY. Fascicle of Management and Technological Engineering., 2010
Key Engineering Materials, 2015