Title
Evaluation of thermal degradation of 2.25Cr-1Mo steel by high frequency ultrasonic attenuation measurement
Keywords
ultrasonic attenuation; nondestructive evaluation; thermal degradation; 2.25Cr-1Mo steel; NONDESTRUCTIVE EVALUATION; TEMPERATURES; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering
Abstract
It was attempted to assess nondestructively the degree of isothermal degradation of 2.25Cr-1Mo steel by using high frequency longitudinal ultrasonic wave. Microstructural parameter (mean size of carbides), mechanical property (Vickers hardness) and ultrasonic attenuation coefficient were measured for the 2.25Cr-1Mo steel isothermally degraded at 630 degrees C for up to 4800 hours in order to find the correlation among these parameters. The ultrasonic attenuation coefficients at high frequencies (over 35MHz) were observed to increase rapidly in the initial 1000 hours of degradation time and then slowly thereafter, while the ones at low frequencies showed no noticeable increase. Ultrasonic attenuation at high frequencies increased as a function of mean size of carbides. Ultrasonic attenuation coefficient was found to have a linear correlation with the hardness, and suggested accordingly as a potential nondestructive evaluation parameter for assessing the mechanical strength reduction of the isothermally degraded 2.25Cr-1Mo steel.
Journal Title
Pricm 5: The Fifth Pacific Rim International Conference on Advanced Materials and Processing, Pts 1-5
Volume
475-479
Publication Date
1-1-2005
Document Type
Article
Language
English
First Page
257
Last Page
260
WOS Identifier
ISSN
0255-5476; 0-87849-960-1
Recommended Citation
"Evaluation of thermal degradation of 2.25Cr-1Mo steel by high frequency ultrasonic attenuation measurement" (2005). Faculty Bibliography 2000s. 5030.
https://stars.library.ucf.edu/facultybib2000/5030
Comments
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