溶接金属の COD 特性と組織の関係について

概要

論文の詳細を見る
Crack Opening Displacement (COD) tests were carried out in submerged arc weld metals. The fracture initiation properties of wled metals were related to the microstructures. The relationship between them was investigated in the view point of unit crack path on the fracture surface of COD specimen. The results obtained are as follows : (1) The evaluation method of the fracture toughness of submerged arc weld metal was established by means of COD test. (2) The crack initiation properties were related to the microstructures of weld metal. (3) The growth of the uniform fine ferrite structure improves the low temperature toughness of weld metal. (4) The brittle fracture surfaces in COD specimens were closely related to the microstructure, and it was found that the crack initiation temperature at δ_c=0.2mm has a good correlation with the unit crack path based on the direct observation of fracture surface.
社団法人溶接学会の論文
1978-09-05