圧子押込み法による鋼および鋼溶接部の力学的特性推定法の検討
Study on Mechanical Characterization of Steel and Its Welds through Instrumented Indentation Technique
著者:
岡野 成威 Shigetaka OKANO 竹内 周平 Shuhei TAKEUCHI 望月 正人 Masahito MOCHIZUKI
発刊日:
公開日:
Instrumented indentation techniqueLow alloy steel weldsMechanical heterogeneitySpherical indenterStress strain curve
概要
In this study, a semi-nondestructive procedure for stress strain curve estimation was developed using instrumented indentation technique. Additionally, to estimate local stress ? strain curve in the welds with mechanical heterogeneity, a relation between spherical indentation size and measuring range of mechanical property was quantified by using finite element analysis of spherical indentation technique. The developed technique was applied to estimate mechanical properties of low alloy steel and its welds. To obtain mechanical heterogeneity in welds, two pass welding was performed on the surface of material with a certain level of transverse distance. With appropriate indentation size, distinguished stress strain curve was successfully obtained at each position, such as weld metal, heat affected zone and base metal. Thus, it was concluded that the developed technique was useful to estimate mechanical heterogeneity in the welds with a high degree of accuracy through simple process.
