X線マイクロディフラクトメータによる破面の解析(第1報)

衝撃試験破面に対する検討

抄録

It is necessary to know the distributions of plastic strain in the materials and also the features on fracture for analyzing the fracture mechanism. In this investigation, fracture surfaces after impact test was analyzed using X-ray micro-diffractometer. The material used was Al-killed steel. Plastic strains on the fracture surfaces were evaluated using the integral breadth of X-ray diffraction intensity curves. Plastic strain was large near the notch root and had minimum at a position 2-3 mm away from the notch root. Thereafter, the plastic strain increased as the distance from the notch root increased. The estimated energy using plastic strain thus obtained corresponded approximately to the impact energy.