Ultrasonic Examination of TI-6-4 and Nitrided TI-6-4 Materials

Mittleman, John; Han, K. Y.; Thompson, R. B.

doi:10.1007/978-1-4615-1987-4_187

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…( 7) are also compared with the experimental results conducted previously on the nitrided Ti64. The grain noise measurements obtained experimentally [10] are fit with the SSR model in Figure 2 measurements (mV) are different with those of the theoretical prediction of dimensionless quantity Φ¹(t)/Φ₀ such that the curve fitting could be adjusted flexibly in the vertical dimension. The main purpose is to obtain the closest curve shape compared with the experimental result.…”

Section: Example Numerical Results and Comparisonmentioning

confidence: 81%

“…The results of FOM are obtained as a function of q within this range for a 50 MHz input signal and shown in Figure 2(a). The work of the experimental measurements [10] also gave the predicted FOM for nitrided Ti64 from the independent scatter model (ISM) as 0.45 cm −1/2 for the same input frequency. Compared with these results, the FOM model Eq.…”

Section: Example Numerical Results and Comparisonmentioning

confidence: 95%

“…Example results are presented for specific cases of polycrystals with decorated grain boundaries. The decorated particle boundary structure [10] is composed of the nitrided titanium -6 aluminum -4 vanadium (Ti64). Titanium alloys often exhibit complex microstructures and are widely used in industry.…”

Section: Example Numerical Results and Comparisonmentioning

confidence: 99%

“…For simplification, the nitrided Ti64 is considered as a two-phase structure -the microspheres and the titanium nitride shell. An SEM image of consolidated nitrided powders [10] shows that the thickness of the interfaces is approximately 16 to 18 μm, independent of particle diameter, and the mean particle size is about 0.24 mm.…”

Section: Example Numerical Results and Comparisonmentioning

confidence: 99%

See 3 more Smart Citations

Ultrasonic backscatter in two-phase media and its dependency on the correlation function

Liu

Turner²

2013

Proceedings of Meetings on Acoustics

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Section: Example Numerical Results and Comparisonmentioning

confidence: 81%

Section: Example Numerical Results and Comparisonmentioning

confidence: 95%

Section: Example Numerical Results and Comparisonmentioning

confidence: 99%

Section: Example Numerical Results and Comparisonmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasonic backscatter in two-phase media and its dependency on the correlation function

Liu

Turner²

2013

Proceedings of Meetings on Acoustics

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“…The general formulation here can be directly related to sintered metals, concrete, and polycrystals with decorated grain boundaries for which previous models had difficulty explaining the experimental results. 31,32 These results should be very useful for nondestructive testing and materials characterization research despite the simplicity of the assumptions made.…”

Section: Discussionmentioning

confidence: 99%

Influence of spatial correlation function on attenuation of ultrasonic waves in two-phase materials

Liu

Turner

2008

The Journal of the Acoustical Society of America

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Successful processing of materials by powder sintering relies on the creation of strong interparticle bonds. During certain critical stages of the sintering process, the medium may be modeled as two phases consisting of the particles and a surrounding matrix. Ultrasonic methods have been proposed as a potential tool for monitoring such sintering processes. Thus, an understanding of the propagation and scattering of elastic waves in two-phase solids is of fundamental importance to these monitoring techniques. In this article, expressions for the ultrasonic attenuations are developed based on the spatial statistics of the density and Lamé parameters of the material constituents under assumptions of statistical homogeneity and statistical isotropy. The formulation is based on the solution of the elastodynamic Dyson equation within the limits of the first-order smoothing approximation. Since the geometric two-point correlation function plays a central role in the model, numerical models are developed using Voronoi polycrystals surrounded by a matrix of different material properties. The spatial statistics of the medium are extracted from these models. The results presented suggest new ultrasonic techniques may be developed to extract multiple correlation lengths for such two-phase microstructures.

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Laboratory nondestructive evaluation technology for materials characterization

Thompson

1996

J Nondestruct Eval

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Ultrasonic Examination of TI-6-4 and Nitrided TI-6-4 Materials

Cited by 4 publications

References 7 publications

Ultrasonic backscatter in two-phase media and its dependency on the correlation function

Ultrasonic backscatter in two-phase media and its dependency on the correlation function

Influence of spatial correlation function on attenuation of ultrasonic waves in two-phase materials

Laboratory nondestructive evaluation technology for materials characterization

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