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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F14%3A00225289%21RIV15-MSM-21220___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://www.icmas.eu/Journal_archive_files/Vol_9-Issue1_2014_PDF/19-24_HAJDUCHOVA_Stodola.pdf
dcterms:description
Estimation of structures life and ensure their safety and integrity is an essential part of the design of equipment for transport, engineering and other industries. Usually, fatal accident occurs often under varying loads without causing changes shape. Application of fracture mechanics and testing is possible to describe the propagation of cracks but the kinetics of damage in the early stages has not yet been expressed. The paper deals with identifying the causes of surface failure of a shaft made of material 42CrMoS4. On the basis of microstructural analysis completed by hardness testing, the occurrence of undesirable phases, such as non-metallic inclusions in the structure of the shaft, can be demonstrated. In the presence of various heterogeneous phases in the material structure, plucking of particles can occur during chip machining which leads to surface damage. In the conclusion, the authors recommend checking the starting material, which can eliminate problems that cause the degradation of the surface of the shaft. The failure of the surface causes the notch effect which initiates further failures of the material. Using highly sensitive methods for observing the surface such as scanning electron mikroskopy etc., unique data on mechanism of crack initiation were obtained. The authors present selected partial results of longitudinal studies that deal with failure mechanisms and surface materials and the formation of cracks. Estimation of structures life and ensure their safety and integrity is an essential part of the design of equipment for transport, engineering and other industries. Usually, fatal accident occurs often under varying loads without causing changes shape. Application of fracture mechanics and testing is possible to describe the propagation of cracks but the kinetics of damage in the early stages has not yet been expressed. The paper deals with identifying the causes of surface failure of a shaft made of material 42CrMoS4. On the basis of microstructural analysis completed by hardness testing, the occurrence of undesirable phases, such as non-metallic inclusions in the structure of the shaft, can be demonstrated. In the presence of various heterogeneous phases in the material structure, plucking of particles can occur during chip machining which leads to surface damage. In the conclusion, the authors recommend checking the starting material, which can eliminate problems that cause the degradation of the surface of the shaft. The failure of the surface causes the notch effect which initiates further failures of the material. Using highly sensitive methods for observing the surface such as scanning electron mikroskopy etc., unique data on mechanism of crack initiation were obtained. The authors present selected partial results of longitudinal studies that deal with failure mechanisms and surface materials and the formation of cracks.
dcterms:title
Degradation of the Shaft Surface During Machninig Technology Degradation of the Shaft Surface During Machninig Technology
skos:prefLabel
Degradation of the Shaft Surface During Machninig Technology Degradation of the Shaft Surface During Machninig Technology
skos:notation
RIV/68407700:21220/14:00225289!RIV15-MSM-21220___
n3:aktivita
n13:O
n3:aktivity
O
n3:cisloPeriodika
1
n3:dodaniDat
n10:2015
n3:domaciTvurceVysledku
n6:3623130
n3:druhVysledku
n11:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n15:predkladatel
n3:idSjednocenehoVysledku
10065
n3:idVysledku
RIV/68407700:21220/14:00225289
n3:jazykVysledku
n9:eng
n3:klicovaSlova
chip machining; surface defects; non-metallic inclusions; microstructure; hardness; cracks
n3:klicoveSlovo
n5:non-metallic%20inclusions n5:cracks n5:hardness n5:chip%20machining n5:microstructure n5:surface%20defects
n3:kodStatuVydavatele
RO - Rumunsko
n3:kontrolniKodProRIV
[09CF6931E012]
n3:nazevZdroje
Proceedings in Manufacturing Systems
n3:obor
n12:JG
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
3
n3:rokUplatneniVysledku
n10:2014
n3:svazekPeriodika
9
n3:tvurceVysledku
Stodola, J. Pešlová, Františka Hajduchová, L.
s:issn
2067-9238
s:numberOfPages
6
n7:organizacniJednotka
21220