Nonlinear Ultrasonic Properties of As-Quenched Steels

Hurley, Donna C.; Purtscher, P. T.; Balzar, Davor; Hollman, Kyle W.; Fortunko, C. M.

doi:10.1007/978-1-4615-5339-7_191

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Contributions from dislocations and their interactions with microstructural features and interfaces in structural materials demonstrated potential applications as a nondestructive technique for evaluating microstructures. Measurements of acoustic harmonic generation and the nonlinearity parameter, ~, have been shown to be sensitive to microstructure variations in materials such as interstitial carbon concentration and martensite tetragonality in steels [2], percent second phase [3] and fatigue induced dislocations [4] in aluminum alloys. From the noted examples, acoustic harmonic generation measurements are seen a cradle-to-grave technique, with applications beginning with materials processing and monitoring the material throughout service.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Harmonic Generation Measurements for Materials Characterization

Barnard

1999

Review of Progress in Quantitative Nondestructive Evaluation

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Section: Introductionmentioning

confidence: 99%

Acoustic Harmonic Generation Measurements for Materials Characterization

Barnard

1999

Review of Progress in Quantitative Nondestructive Evaluation

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Evaluation of Ultrasonic Nonlinear Characteristics in Artificially Aged Al6061-T6

Kim¹,

Lee²,

Jhang

et al. 2014

Journal of the Korean Society for Nondestructive Testing

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Generally, the nonlinearity of ultrasonic waves is measured using a nonlinear parameter , which is defined as the ratio of the second harmonic's magnitude to the power of the fundamental frequency component after the ultrasonic wave propagates through a material. Nonlinear parameter  is recognized as an effective parameter for evaluating material degradation. In this paper, we evaluated the nonlinear parameter of Al6061-T6 which had been subjected to an artificial aging heat treatment. The measurement was using the transmitted signal obtained from contact-type transducers. After the ultrasonic test, a micro Vickers hardness test was conducted. From the result of the ultrasonic nonlinear parameter, the microstructural changes resulting from the heat treatment were estimated and the hardness test proved that these estimates were reasonable. Experimental results showed a correlation between the ultrasonic nonlinear parameter and microstructural changes produced by precipitation behavior in the material. These results suggest that the evaluation of mechanical properties using ultrasonic nonlinear parameter  can be used to monitor variations in the mechanical hardness of aluminum alloys in response to an artificial aging heat-treatment.

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Nonlinear Ultrasonic Properties of As-Quenched Steels

Cited by 2 publications

References 7 publications

Acoustic Harmonic Generation Measurements for Materials Characterization

Acoustic Harmonic Generation Measurements for Materials Characterization

Evaluation of Ultrasonic Nonlinear Characteristics in Artificially Aged Al6061-T6

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