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Wyniki 1-6 spośród 6 dla zapytania: authorDesc:"STANISŁAW ROSKOSZ"

» Application of profilometry method for quantitative description of fracture of AZ91 alloy

STANISŁAW ROSKOSZ  JANUSZ ADAMIEC  
The methodology and examination results of the surfaces and profiles of fractures generated in a static tensile test of alloy AZ91 are presented together with a quantitative evaluation of phases’ dominance in the fracture. Relations between the structure, the fracture and the mechanical properties in the as-cast state and after heat treatment have been analyzed. INTRODUCTION The basic[...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2007/3-4


 

» Influence of the macro- and microstructure of AZ91D alloy after thermal treatment on its mechanical properties

JANUSZ ADAMIEC  STANISŁAW ROSKOSZ  TADEUSZ GANCARCZYK  
The relationships between the AZ91D alloy’s macro- and microstructure and its mechanical properties when in the as-cast condition and after thermal treatment conducted in accordance with the PN-88/H-88050 standard are presented in this paper. Examination of the mechanical properties of the AZ91D alloy was carried out, including uniaxial tension tests and hardness examination. The alloy'[...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2007/3-4


 

» Analysis of inhomogeneity of gradient percolation structures, based on the notion of affinity

JERZY CHMIELA  DAMIAN SŁOTA  STANISŁAW ROSKOSZ  
The paper presents the results of an inhomogeneity analysis of gradient percolation structures of cast-iron rollers cast into metal moulds. The variable intensity of cast iron solidification in permanent mould contributes to the creation of a structure of large inhomogeneity degree, characterised with gradients of surface fraction of cementite as well as pearlite and graphite being reversely [...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2008/4


 

» Evaluation of sialon ceramics - crack resistance via surface stereometry and multifractal analysis

SEBASTIAN STACH  JERZY CYBO  STANISŁAW ROSKOSZ  JAN CWAJNA  
One of the most frequently applied parameters in quantitative fractography is the fracture area development coefficient RS. It provides, inter alia, the information on the fracture formation mechanism and the energy consumed for its formation. Sialon ceramics studies confirm this viewpoint [1]. For selected parameters RS qualitative dependencies were developed. A proportional relation betwee[...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2007/3-4


 

» Characterization of top surface of gradient TBC by confocal scanning laser microscopy

GRZEGORZ MOSKAL  LUCJAN SWADŹBA  STANISŁAW ROSKOSZ  BOGUSŁAW MENDALA  
In the article, the results of investigation of the outer layer of TBC type gradient ceramic coatings are presented (Fig. 3). The application of confocal microscopy enabled the imaging of topographic surface maps and their 3D reconstruction (Fig. 4,5). The numerical treatment of the qualitative results provided the means for quantitative characterisation of the surface roughness, employing pa[...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2007/3-4


 

» Verification of the stereometric-fractal description of overlaps in sialon ceramics' fractures

SEBASTIAN STACH  STANISŁAW ROSKOSZ  JERZY CYBO  JAN CWAJNA  
A quantitative description of overlaps on fractures in sialon ceramics, is presented in the paper. A conventional analysis, aiming at the determination of the percentage share of overlaps on the basis of quantitative fractography, was preceded by stereometric/fractal analyses. They enabled the selection of representative sections of samples and then, the production of transverse microsections[...] więcej»
w zeszycie INŻYNIERIA MATERIAŁOWA 2008/4


 

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