발간논문

Home > KJMM 논문 > 발간논문

Vol.27, No.5, 473 ~ 482, 1989
Title
Environmental effect and Cyclic Plastic Strain energy in low Cycle Fatigue of Nb - bearing HSLA Steel
홍순형S . H . Hong, 박종욱C . O . Park, 이원종W . J . Lee
Abstract
The influence of plastic strain amplitude and gaseous environment on the low cycle fatigue properties has been studied in a Nb-bearing HSLA steel. The cyclic response under plastic-strain controlled loading is determined. Neither the cyclic stress-strain curve (CSSC) shows a plateau nor persistent slip bunds (PSB`s) have been observed in the bulk. The cyclic plastic strain energy (ΔW) and the accumulated plastic strain energy (W) have been calculated as a function of plastic strain amplitude (Δ_(εΡ)/2) in the form of Κ(Δ_(εp)/2)＾N. The computed values of ΔW and W are in good agreement with the experimental data. The vacuum environment enhances fatigue crack initiation life, fatigue life and W. The environmental effect becomes more severe as the plastic strain amplitude decreases. Tensile properties, cyclic stress response and ΔW are not affected by the gaseous environment.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.