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http://dx.doi.org/10.3795/KSME-A.2013.37.3.353

Change in Ultrasonic Characteristics with Isothermal Heat Treatment of 2.25Cr-1Mo Steel  

Nam, Young-Hyun (Center for Material Measurement, Korea Research Institute of Standards and Science)
Baek, Un-Bong (Center for Material Measurement, Korea Research Institute of Standards and Science)
Park, Jong-Seo (Center for Material Measurement, Korea Research Institute of Standards and Science)
Nahm, Seung-Hoon (Center for Material Measurement, Korea Research Institute of Standards and Science)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.3, 2013 , pp. 353-358 More about this Journal
Abstract
The ultrasonic characteristics of 2.25Cr-1Mo steel were investigated in relation to the isothermal heat treatment temperature and time. Charpy impact tests and hardness tests were conducted on individual specimens with three different heat treatment conditions. A pulse-echo method with longitudinal waves was used to measure the attenuation and velocity of ultrasonic waves. The FATT (fracture appearance transition temperature) increased with an increase in the isothermal heat treatment time, which implies that the toughness decreased. As the isothermal heat treatment time and temperature increased, the longitudinal wave velocity and ultrasonic attenuation coefficient were raised.
Keywords
Hydrogen; Isothermal Heat Treatment; Pressure Vessel; Ultrasonic; 2.25Cr-1Mo Steel;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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