Št. zadetkov: 9
Izvirni znanstveni članek
Oznake:
continuous casting;cracks;thermal fatigue;fractal;damage;diagnostics;surface;
We have studied continuous-casting machine rolls' surface thermal cracking images. On the fundamentals of fractals a thermal cracking procedure analysis was proposed. The achieved results show that the thermal cracks have a strong self-similarity, according to the fractal laws, and the values of the ...
Leto:
2012
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
zvarni spoji;rast zrn;mikrostruktura;mehanske lastnosti;meja tečenja;Parisova krivulja;zaostale napetosti;welded joints;coarse grain HAZ;microstructure;fatigue limit;Paris curve;
This paper presents results of a study on martensitic coarse grain heat affected zone that can appear in welded joints. Mechanical properties of martensitic coarse grain heat affected zone and its microstructure were investigated. Special attention was given to its behaviour during the cycle loading ...
Leto:
2012
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
small defect;drilled hole;crack initiation;crack propagation;short crack;long crack;anomalous fast-crack propagation;
Specimens with martensitic microstructure were defected by tiny drilled holes with the existing local residual stresses induced by drilling and without them. The objective of this research was to determine the cyclic stress level for the crack initiation and fatigue limit of the defected and smooth ...
Leto:
2013
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
fracture;heat-resistant steel;cyclic loading;fatigue;plastic deformation;
Regularities of static and cyclic deformation, damage and fracture of heat-resistant steel 25Kh1M1F, based on the approaches of physical mesomechanics and 3D interferometry method, are presented in this paper. The applicability of these techniques for different hierarchy levels of deformation was st ...
Leto:
2013
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
defect size fatigue strength;damageability;heat-affected zone;
Fatigue strength of welds with various defects made by Vickers pyramide
Leto:
2011
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
udarna žilavost;preizkušanje;poškodbe;plinovod;jeklo;razgradnja;impact toughness;fracture;damage;gas pipeline;steel;degradation;
The correlation of microstructure, temperature and Charpy V-notch impact properties of a steel 17G1S pipeline steel was investigated in this study. Within the concept of physical mesomechanics, the dynamic failure of specimens is represented as a successive process of the loss of shear stability, wh ...
Leto:
2014
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
fatigue;surface;digital image;diagnostics;accumulated damage;defect propagation;evaluation;
An identification and quantitative analysis of the deformation relief of the aluminium alloy for an aircraft construction based on a digital-image processing has been performed. The behaviour of defects has been assessed on the basis of diagnostics results for individual stages of the deformation pr ...
Leto:
2013
Vir:
Fakulteta za strojništvo (UM FS)
Strokovni članek
Oznake:
nanoprevleke;razpoke;preiskava materiala;nanocoatings;cracks;materials testing;
The regularities and spatial distribution of multiple cracking of a nanocoating are investigated. It is found that in the cracking zones the relaxation of the stresses accumulated in the coating takes place; moreover, the intensity of its failure is determined by the structural level of defect accum ...
Leto:
2012
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
impact toughness;main gas pipeline;failure analysis;
By example of steel 17G1S, the regularities in the impact fracture of Charpy specimens at normal and low temperatures are described. The relationship between the energy parameters of fracture (impact toughness) and the deformation response of the material (the height of shear lips) of the specimens ...
Leto:
2015
Vir:
Fakulteta za strojništvo (UM FS)