2,680 research outputs found
New phenomena in interaction of intense ultrashort light pulses with transparent materials: from 3D self-assembled nanostructures to quill writing and nonreciprocal photosensitivity
Interaction of intense ulrashort light pulses with transparent materials reveal new ultrafast phenomena. Recent demonstrations of 3D nanoripple formation, ultrafast laser calligraphy and nonreciprocal photosensitivity are reviewed
Recent advances in ultrafast laser processing of transparent materials
Interaction of intense ulrashort light pulses with transparent materials reveal new interesting properties and phenomena. Recent demonstrations of 3D nanoripple formation, self-assembled form birefringency and ultrafast laser calligraphy are reviewed
Ultrasonic pole figure for the texture of aluminum alloy
Copyright 1987 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 50(20), 1411-1412, 1987 and may be found at http://dx.doi.org/10.1063/1.9783
Electromagnetically excited acoustic resonance for evaluating attenuation coefficient and grain size in polycrystalline metals
Copyright 1994 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 64(17), 2217-2219, 1994 and may be found at http://dx.doi.org/10.1063/1.11167
Advanced EMAT-Resonant Technique for Assessment of Damage Accumulation and Remaining Life of Crept Stainless Steel
Many of fossil power plants, which were constructed during 1960âs and 70âs and exceed more than 10,000 working hours, have presently been operating while they have been receiving progressive damage, mainly from creep, as the time proceeds. [1, 2] Furthermore, by shifting the base load of power from fossil power plants to nuclear power plants, they are faced to even more severe operating condition such as daily or weekly startup and shutdown in order to correspond to rapid change of the demand for power. As the consequence of this trend, the materials degradation was accelerated. Therefore, a nondestructive technique is now highly required for safely operating plants and predicting the remaining life. It is also important for the technique to be simple and quick-operating to cope with the large number of measuring points
Nonlinear resonance interaction of ultrasonic waves under applied stress
Copyright 1984 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics, 56(1), 235-237, 1984 and may be found at http://dx.doi.org/10.1063/1.33375
Leaky Lamb Wave Along VCR Magnetic Tapes
High recording density with the home-use digital VCRs requires the use of narrow tracks, short recording wavelength, and thin magnetic tapes. Knowledge of Youngâs modulus of the tape is essential for the precise positioning of the tape on the rotating drums and then a stable tape-to-head interface. The magnetic tapes usually show different Youngâs moduli for the machine direction (MD) and the transverse direction (TD) [1]. The anisotropy develops mainly in the base film of polyethylene terephthalate (PET) through the partial crystallization and the crystallite orientation alignment during the stretching process on the tapes [2], while the original PET sheet, from which the tapes are cut, shows much less anisotropy. This situation requires the determination of Youngâs moduli for both MD and TD of the tape. The tapes on play are straightened by tensile loads, which should be controlled with Youngâs modulus for the MD. Too much load may distort the recorded tracks or damage the tape. Besides, the vertical load is applied onto both edges of the running tape by the guiding rollers. Again, too much load may induce the tape buckling. Critical load is proportional to the Youngâs modulus in the TD. Large moduli are desirable for both directions
Resonance EMAT system for acoustoelastic stress measurement in sheet metals
Copyright 1993 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Review of Scientific Instruments, 64(11), 3198-3205, 1993 and may be found at http://dx.doi.org/10.1063/1.114432
Material processing using ultrashort light pulses with tilted front
Femtosecond laser writing in glass is controlled by the polarization plane azimuth and intensity front tilt of light pulse. Polarization dependent distribution of extraordinary modifications along the light propagation direction is observed
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