Evaluation of Austenite Phase in High-Carbon Steels by Ultrasonic Longitudinal Velocity
作者： S. H. Khan , A. Nusair Khan
DOI: 10.1520/JTE20140504
关键词: Quantitative determination 、 Materials science 、 Diffraction 、 Metallurgy 、 High carbon 、 Austenite 、 Phase (matter) 、 Ultrasonic sensor 、 Rockwell scale 、 Electron microscope
摘要: Retained austenite is a remnant product that may induce significant changes in mechanical properties of the steel. Consequently, accurate and economical measurement retained very important. In this regard, specimens AISI-440C AISI-A2 steels were austenized at different temperatures ranging from 950°C to 1250°C then air cooled. This led major microstructural these specimens. These characterized by using x-ray diffraction techniques, optical electron microscopy, Rockwell hardness testing, ultrasonic flaw detectors. study revealed there good correlation exists between phase longitudinal velocity. The magnitude velocity can be used obtain reliable, quick, quantitative determination volume percentage present on production floor with relative ease, less destructive, as compared other methods.
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