金屬並に合金折れ口 (Fracture) の 4 型式 : 第 2 報單相の部の結論

概要

論文の詳細を見る
The experimental results contained in the 1st. report were discussed from another angle and the 4 types were described in more exact and perfect form. A few new data were also added. Type 1. Transgranular. Separation occurs along cleavag planes or "Spaltflache". Fineness of fracture coincides with grain size. Very rough fracture as shown by Bi and Zn. Type 2. Transgranular. Slipping occurs along slip planes. Fracture is generally very much finer than grain size, fineness is equal with the width of one to three slip bands or with the width of a twin. Very fine fracture as shown by annealed brasses and brozes. Type 3. Transgranular. Breaking occurs along the boundaries of dendrite stems and big branches, and even when they are crossed the zigzags of their sizes are revealed on the fractured surface. Very fine fracture as shown by most cast metals and alloys. Type 4. Intergranular. An abnormal fracture breaking along grain boundaries. Fineness coincides with grain size. Very rough fracture as shown by most metals and alloys broken at high temperatures.
社団法人日本鉄鋼協会の論文
1933-01-25