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http://dx.doi.org/10.21289/KSIC.2022.25.6.1055

Mechanical and Elastic Wave Properties of STS316L with Different Reverse Transformation Temperature and Time  

Do, Jae-Yoon (Dept. of Mechanical System, Busan Campus of Korea Polytechnics)
Tak, Young-Joon (Dept. of Materials Science and Engineering, Pukyong National University)
Shin, Ki-Hang (Dept. of Materials Science and Engineering, Pukyong National University)
Nam, Ki-Woo (Dept. of Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.25, no.6_2, 2022 , pp. 1055-1062 More about this Journal
Abstract
In this study, the mechanical properties of 80% cold-rolled austenitic 316L stainless steel were evaluated using specimens subjected to reverse transformation at 500-750℃ for 20 minutes and reverse transformation at 700℃ for 2-60 minutes. Also, for the elastic wave obtained from the tensile test, the dominant frequency according to the reverse transformation condition was investigated by time-frequency analysis. The SEM image of the 80% cold-rolled material was transformed into martensite and showed line and cross shapes. The TEM image showed that line shapes were shown at the grain, and grain boundary of martensite. The higher the heat treatment temperature and the longer time, the larger the grain. Tensile strength decreased as the heat treatment temperature and time increased, but elongation increased. Hardness was proportional to tensile strength. This is because the grain with different directions showed the same direction due to reverse transformation. The dominant frequency was decreased and then increased as the temperature and time increased. This is because the direction of the grain is different at a low temperature and the same direction is shown at a high temperature.
Keywords
Dominant Frequency; Elastic Wave; Mechanical Properties; Reverse Transformation Temperature and Time; STS316L Stainless;
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Times Cited By KSCI : 1  (Citation Analysis)
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