X-ray measurement of an ultrasonic wave amplitude in a crystal

Lazara, Kenneth J.; Zayas, Jose M.; Zajac, Alfred

doi:10.1121/1.380692

Cited by 4 publications

(1 citation statement)

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“…The major limitation of the microscope observation method is that the machining marks, indicating diamond grains trajectories, can only be observed on the RUM-machined surface of ductile materials (The details of the microscope observation method will be reviewed in Section 2 of this paper.). In addition, some methods have been reported for measuring ultrasonic vibration amplitude in other applications [25][26][27][28][29][30][31][32][33][34], which can be potentially utilized in RUM without machining of materials. The investigations on all of these reported methods indicate that there is a lack of methods to measure ultrasonic vibration amplitude in RUM machining of brittle materials.…”

Section: Introductionmentioning

confidence: 99%

A mechanistic ultrasonic vibration amplitude model during rotary ultrasonic machining of CFRP composites

et al. 2017

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Rotary ultrasonic machining (RUM) has been investigated in machining of brittle, ductile, as well as composite materials. Ultrasonic vibration amplitude, as one of the most important input variables, affects almost all the output variables in RUM. Numerous investigations on measuring ultrasonic vibration amplitude without RUM machining have been reported. In recent years, ultrasonic vibration amplitude measurement with RUM of ductile materials has been investigated. It is found that the ultrasonic vibration amplitude with RUM was different from that without RUM under the same input variables. RUM is primarily used in machining of brittle materials through brittle fracture removal. With this reason, the method for measuring ultrasonic vibration amplitude in RUM of ductile materials is not feasible for measuring that in RUM of brittle materials. However, there are no reported methods for measuring ultrasonic vibration amplitude in RUM of brittle materials. In this study, ultrasonic vibration amplitude in RUM of brittle materials is investigated by establishing a mechanistic amplitude model through cutting force. Pilot experiments are conducted to validate the calculation model. The results show that there are no significant differences between amplitude values calculated by model and those obtained from experimental investigations. The model can provide a relationship between ultrasonic vibration amplitude and input variables, which is a foundation for building models to predict other output variables in RUM.

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Section: Introductionmentioning

confidence: 99%

A mechanistic ultrasonic vibration amplitude model during rotary ultrasonic machining of CFRP composites

et al. 2017

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On the Suppression of X‐Ray Anomalous Transmission by Acoustic Oscillations

Éntin

1985

Physica Status Solidi (b)

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It is shown that the Debye-Waller factor describes correctly the Borrmann effect acoustic suppression only within the short-wave range (& < T , 1, ultrasonic wavelength, t extinction length).The suppression factor is expressed both, for long-wave (A, >t) and intermediate (As t) cases.An analysis of the published experimental data establishes that an incorrect description of the suppression effect by the Debye-Waller factor can cause an error of several orders when determining displacements by the measured attenuation of anomalous transmission. In some cases experimental results demonstrate the main contribution of X-ray acoustic resonance to the suppression effect. nOKa3aH0, ' I T 0 MHOWHTeJIb J(e6af1-Bannepa npaBHJIbH0 OIIllCbIBaeT aIFyCTElYeCKOe AJIIlHa BOJIHbI yJIbTpa3ByKa, t 3KCTMHKuEIOHHaFI JXJIEIHa). nOnyYeHb1 BbIpaXeHEIH HJIFI $aKTOpa IIOAaBJIeHkIfI B JXJIEIHHOBOJIHOBOM (As >T) EI npOMeXyTOYHOM (As NN t) CJXyYaFIX. noHasneHne a @ $ e~~a EopMaHa TomKO B KOPOTKOBOJIHOBOM npeaene (& < t, As I43 a~a~11i3a m%emuwxcfI B nwrepaType a~c n e p~~e~~a n b~b r x naHHbix cnenyeT, YTO Hesop-pemHoe onmame a $ + e~~a noaaBneHm c noMoubm #aKTopa J(e6am-Bannepa MOWeT JXaTb O L U E I~K~ B HeCKOJIbKO IIOpRnIFOB npEI OIIpeAeJIeHHEI CMeQeHEld no H3MepeH-HOMY ocna6ne~am aHOMaJIbHOr0 npOXOX~eHEIfI. B PfIJXe CJIyYaeB 3KCIlePEIMeHTaJIbHbIe B B#@eIFT IIOAaBJIeHEIfI. pe3ynb~a~bi yxa3b1sam~ Ha onpenemmu@ Bxnaa PeHTreHoaKycTHsecKoro p e 3 o~a~c a

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