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http://dx.doi.org/10.21289/KSIC.2021.24.3.295

Elastic Wave Characteristics of Austenitic STS202 with Subzero Treatment  

Choi, Seong-Won (Deptment of Materials Science and Engineering, Pukyong National University)
Choi, Byoung-Chul (Department of Energy and Chemical Process, Petro Chemical Training Center of Korea Polytechnics)
Nam, Ki-Woo (Deptment of Materials Science and Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.24, no.3, 2021 , pp. 295-300 More about this Journal
Abstract
This study investigated the dominant frequency of the elastic waves from the tensile test. The specimen was rolled with five different rolling degrees (10, 22, 33, 42 and 50%), which was treated subzero. The specimen was rolled at room temperature, which was transformed from austenite to martensite (only α'-martensite). The dominant frequency increased with an increase in the rolling degree regardless of the subzero temperature, and decreased after 33% of the rolling degree. On the other hand, higher frequency band was obtained at lower temperature and long time. The dominant frequency increased when the amount of α'-martensite increased and decreased with the α'-martensite amount between 50-65%. The lower subzero treatment temperature increased the amount of α'-martensite, which resulted in the higher dominant frequency. The longer treatment time at the same subzero temperature led to an increase in the amount of α'-martensite, leading to high dominant frequency.
Keywords
Au stenitic STS202; Different Rolling Degree; Martensite; Elastic Wave;
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