오스테나이트계 316L 스테인리스강의 강도 및 감쇠능에 미치는 미세조직의 영향

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 20; no. 1; pp. 1 - 6
• Main Authors: 손동욱(DONG-WOOK SON), 이종문(JONG-MOON LEE), 김효종(HYO-JONG KIM), 남기우(KI-WOO NAM), 박규섭(KYU-SEOP PARK), 강창룡(CHANG-YONG KANG)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2006
• Subjects: 해양공학; 316L Stainless Steel 316L 스테인리스 강; Volume Fraction 체적분율; Cold Working 냉간가공; Elongation 연신율; Tensile Strength 인장강도; Damping Capacity 감쇠능
• ISSN: 1225-0767; 2287-6715

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.