Surface defects
Non contact ultrasonic detection of angled surface defects
... needed. Surface defects in metals are not necessarily confined to orientations normal to the sample surface; however, much of the previous work investigating the interaction of ultrasonic ...
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Analysis of Surface Defects of Ferrous Castings by using Magnetic Particle Inspection
... detecting surface and limited subsurface indications in ferromagnetic ...the surface and as well as inner surface defects in ferrous ...the surface and as well as inner surface ...
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Analysis of alternative current field detection signals based on complex surface defects
... several defects may occur at the same time. Multiple defects may appear as cross-shaped cross cracks, round-hole defects, and parallel ...complex defects, the effects of cross-type cross ...
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Non contact ultrasonic characterisation of angled surface defects
... ABSTRACT. Surface ultrasonic waves have been shown to have many uses in non-destructive testing, in particular for gauging the depth of surface ...these defects are oriented normal to the ...the ...
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Effects of surface defects on rolling contact fatigue of 60/40 brass
... of surface defects on rolling contact fatigue of 60/40 brass under a maximum contact pressure of 600 MPa and a slide-roll ratio of -1% was undertaken on a twin-disc rolling-sliding test ...disc ...
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Detection and Analysis of Surface Defects in Metals Using Wavelet Transform
... automated surface inspection technique is the only immediate alternative to human inspector in order to detect the abnormalities which deviate from the actual ...The surface defects generally result ...
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An evolutionary classifier for steel surface defects with small sample set
... Nowadays, surface defect detection systems for steel strip have replaced traditional artificial inspection systems, and automatic defect detection systems offer good performance when the sample set is large and ...
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Stress intensity factor calculation for surface defects in elbows
... The number of relevant parameters for the characterisation of the geometry of an elbow with a surface crack is too high to develop a specific compendium of influence function for the stress intensity factor ...
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Identification Of Surface And Sub-Surface Defects In Gear By Using Thermographic Technique
... 8 Micropitting are phenomenan where there is a small hole on the gear teeth. Micropitting happens when the oil film between the elements is equal to the average thickness of the roughness of the two surfaces. When this ...
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Multiscale expansion and numerical approximation for surface defects⋆
... In many physical situations, one has to consider objects whose geometry involves different scales. Typically, to the macroscopic description should be added a microscopic level of details: this is the case for granulates ...
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The effects of surface defects on the fatigue of water and oil lubricated contacts
... Rolling contact tests were conducted under a maximum contact pressure of either 600 or 750 MPa for brass, and 900 or 1500 MPa for rail and wheel steels. These represent typical loads experienced in wheel/rail contacts. ...
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A FRAMEWORK TOWARDS ACHIEVING QUALITY IN CASTING: A REVIEW
... crack-like defects, all other casting defects are more or less voluminous and ...sub-surface defects presented in this section, porosity type defects may lead to hazardous flaws with ...
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A Facile Strategy for the Growth of an Anodic Oxidation Film of the Ti13Nb13Zr Alloy Driven by Residual Stress
... alloy surface is prepared. The change is coupled to an increase in surface defects and the surface Gibbs free energy, providing structural disorder and boosting the intrinsic activity of the ...
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Research and classification of surface and internal defects of ceramic cutting tool
... the surface of the ceramic layer by coating and/or modification (ion implantation and laser alloying), allowing to transform the properties of the surface and surface layer of the original ...the ...
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A Generic Adaptive Fractal Filtering Algorithm for Identifying Work Piece Defects on Multiple Surfaces
... Third, by using the proposed fractal filtering algorithm, surface defects on a flange workpiece 24.. are identified.[r] ...
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Disc machine testing to assess the life of surface damaged railway track
... rail surface features which commonly ...certain surface topography will be present. Also, the surface can exhibit manufacturing defects and indentations that stem from handling or operating ...
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Modelling of silver adhesion on MgO(100) surface with defects
... Both surface defects cause strong redistributions of the electron density which increase the binding energy of metal atoms by more than an order of ...
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Towards zero-defect manufacturing with a combined online - offline fuzzy-nets approach in wire electrical discharge machining
... Such surface defects appear like lines parallel to the wire spooling direction and can consist of simple local “darkening” of the surface or include a local variation of the surface profile ...
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An optical method for measuring surface roughness of machined Carbon Fibre Reinforced Plastic composites
... Key words Carbon fibre, composite machining, edge trimming, surface roughness, milling, surface defects, surface inspection, surface integrity Introduction Surface roughness measurement [r] ...
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Failure Analysis of Base Plate Bolts of Radial Forging Machine
... 2. Fracture cross-sectional images as well as SEM images show fatigue occurrence, which is one of the most common causes of failure in bolt joints. The bolt failure mode according to the SEM im- ages is the low fatigue ...
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