Localization of Subsurface Defects in Uncoated Aluminum with Structured Heating Using High-Power VCSEL Laser Arrays
Sign Up to like & getrecommendations! Published in 2019 at "International Journal of Thermophysics"
DOI: 10.1007/s10765-018-2478-9
Abstract: We report on photothermal detection of subsurface defects by coherent superposition of thermal wave fields. This is made possible by structured heating using high-power VCSEL laser arrays whose individual emitter groups can be arbitrarily controlled.… read more here.
Keywords: subsurface; heating using; high power; using high ... See more keywords
Layer by layer exposure of subsurface defects and laser-induced damage mechanism of fused silica
Sign Up to like & getrecommendations! Published in 2020 at "Applied Surface Science"
DOI: 10.1016/j.apsusc.2019.145186
Abstract: Abstract Inert ion beams with large incident angle were used for layer by layer etching of chemical-mechanical polished fused silica. The evolution of the impurities, subsurface defects, surface roughness, and surface molecular structure after ion… read more here.
Keywords: fused silica; subsurface defects; layer; surface ... See more keywords
Characterization of surface and subsurface defects induced by abrasive machining of optical crystals using grazing incidence X-ray diffraction and molecular dynamics
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Advanced Research"
DOI: 10.1016/j.jare.2021.05.006
Abstract: Abstract Introduction Surface and subsurface defects were easily induced during abrasive machining process of optical crystals due to their high brittleness. Accurate characterization of these defects is the prerequisite for obtaining optical components with high… read more here.
Keywords: abrasive machining; subsurface; subsurface defects; diffraction ... See more keywords
Study on the evolution mechanism of subsurface defects in nickel-based single crystal alloy during atomic and close-to-atomic scale cutting
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Manufacturing Processes"
DOI: 10.1016/j.jmapro.2021.07.013
Abstract: Abstract Nickel-based single crystal alloys are widely used in aerospace industry. From the point of view of defect evolution and energy change, the evolution mechanism of subsurface defects in the atomic and close-to-atomic scale (ACS)… read more here.
Keywords: subsurface; evolution; subsurface defects; single crystal ... See more keywords
Study of subsurface damage of monocrystalline nickel in nanometric grinding with spherical abrasive grain
Sign Up to like & getrecommendations! Published in 2019 at "Physica B: Condensed Matter"
DOI: 10.1016/j.physb.2019.02.012
Abstract: Abstract In this paper, molecular dynamics is used to analyze monocrystalline nickel by spherical abrasive grinding. The effects of different grinding speeds, different grinding depths and different sizes of abrasive grains on subsurface defects are… read more here.
Keywords: subsurface; different grinding; spherical abrasive; monocrystalline nickel ... See more keywords
Automatic Quantification of Subsurface Defects by Analyzing Laser Ultrasonic Signals Using Convolutional Neural Networks and Wavelet Transform
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2021.3087949
Abstract: The conventional machine learning algorithm for analyzing ultrasonic signals to detect structural defects necessarily identifies and extracts either time- or frequency-domain features manually, which has problems in reliability and effectiveness. This work proposes a novel… read more here.
Keywords: laser ultrasonic; laser; wavelet transform; ultrasonic signals ... See more keywords