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The Effects of Microstructure in Austenitic 316L Stainless Steels on the Strength and Damping Capacity  

SON DONG-WOOK (Division of Materials Science and Engineering, PKNU)
LEE JONG-MOON (Division of Materials Science and Engineering, PKNU)
KIM HYO-JONG (Division of Materials Science and Engineering, PKNU)
NAM KI-WOO (Division of Materials Science and Engineering, PKNU)
PARK KYU-SEOP (Dept. of Ceramic Science & Engineering, CNU)
KANG CHANG-YONG (Division of Materials Science and Engineering, PKNU)
Publication Information
Journal of Ocean Engineering and Technology / v.20, no.1, 2006 , pp. 1-6 More about this Journal
Abstract
The effects of microstructure on the damping capacity and tensile properties of 316L stainless steel were investigated. Increasing the degree of cold working, the volume fraction of $\varepsilon-martensite$ decreased after rising to maximum value at specific level of cold working, the volume fraction of d-martensite slowly increased and then dramatically increased from the point of decreasing $\varepsilon-martensite$ volume fraction. Increasing the degree of cold working, the behnvior of damping capacity is similar to that of the $\varepsilon-martensite$. After the damping capacity showing the maximum value at about $20\%$ of cold rolling, damping capacity was decreased with the volume fraction of $\varepsilon-martensite$. Tensile strength was proportional to the volume fraction of d-martensite, and elongation steeply decreased in the range low volume fraction of a'-martensite, then slowly decreased in range the above $10\%$ volume fraction of d-martensite. The damping capacity and elongation is strongly controlled by the volume fraction of $\varepsilon$ martensite with liner relationship. However, the effect of the volume fraction of d-martensite and austenite phase on the damping capacity was not observed. Tensile strength was governed by the volume fraction of d-martensite.
Keywords
316L Stainless Steel 316L; Damping Capacity; Cold Working; Volume Fraction; Tensile Strength; Elongation;
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