Ultrasonic Determination of Recrystallization

Generazio, Edward R.

doi:10.1007/978-1-4613-1893-4_165

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…[12][13][14][15] T.Jayakumar 16 has used ultrasonic velocity measurements for estimating the degree of cold work in an austenitic stainless steel. Generazio 17 successfully used ultrasonic attenuation measurements for determining the onset, degree, and completion of recrystallisation in superalloys. Vasudevan et al 18 reported the superiority of ultrasonic velocity measurements over mechanical property evaluation to indicate precisely the time and temperature for onset of recrystallisation in austenitic stainless steel.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural characterisation of thermally degraded 2·25Cr–1Mo steel using ultrasonic measurement and its correlation with mechanical properties

Sahoo

Jha

Sahoo

2014

Materials Science and Technology

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Ultrasonic testing is a sensitive tool not only for defect detection and evaluation of components and structures but also to characterise microstructural features which affect mechanical properties. In this study, four different thermally degraded specimens of 2·25Cr–1Mo steel have been prepared by aging at 873 K for 10 h, 923 K for 20 h, 973 K for 40 h and 973K for 80 h to obtain variation in microstructural features. Mechanical properties of each specimen having different microstructures were investigated using tensile and hardness tests. Ultrasonic parameters of each specimen having different microstructural features were studied by pulse echo technique using 5 MHz longitudinal probe. It has been observed that ultrasonic velocity and attenuation both increased with increase in the size of carbide precipitates obtained due to increased time and temperature of aging. Our results indicated that these ultrasonic parameters could be used as a tool to assess the degraded microstructure of operating components in service.

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Section: Introductionmentioning

confidence: 99%

“…12–15 T.Jayakumar 16 has used ultrasonic velocity measurements for estimating the degree of cold work in an austenitic stainless steel. Generazio 17 successfully used ultrasonic attenuation measurements for determining the onset, degree, and completion of recrystallisation in superalloys. Vasudevan et al .…”

Section: Introductionmentioning

confidence: 99%

Microstructural characterisation of thermally degraded 2·25Cr–1Mo steel using ultrasonic measurement and its correlation with mechanical properties

Sahoo

Jha

Sahoo

2014

Materials Science and Technology

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“…Palanichamy et al [6] have reported the use of longitudinal and shear wave velocity measurements for average grain size estimation in austenitic stainless steel. Generazio [8] for the first time used attenuation measurements to study the microstructural changes during heat treatment in nickel and copper alloy and to determine the onset, degree of recrystallization of aluminium sheet in a manufacturing environment. Recently, Vasudevan et al [10] reported the use of ultrasonic longitudinal wave velocity measurements for studying the annealing behavior of 20 % cold worked austenitic steel type alloyD9.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Cold Rolled Austenitic Stainless Steel by Ultrasonic Longitudinal Velocity

Khan

2012

KEM

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Ultrasonic testing has a strong application in defect detection. An efficient tool for characterizing and life assessment of material structure and components by nondestructive ultrasonic velocity was developed about thirty years ago. Cold rolling results in increase in strength and hardness. The work discussed here is to study quantitative ultrasonic longitudinal velocity for characterizing a change in microstructure due to cold rolling in austenitic stainless steel samples. Samples were cold rolled upto 80 percent in 10 percent step. It was found that the use of velocity measurements is a useful quantitative and non-destructive tool for characterizing amount of cold rolled austenitic stainless steel.

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“…Palanichamy et al [15] have reported the use of longitudinal and shear wave velocity measurements for average grain size in austenitic stainless steel. Generazio [16] for the first time used attenuation measurements to study the microstructural changes during heat treatment in nickel…”

Section: Introductionmentioning

confidence: 99%