S45C摩擦圧接継手の衝撃強度と破断挙動

概要

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In order to investigate the impact characteristics of friction welded joint, the instrumented Charpy impact tests have been carried out at various temperatures from 77 K to 473 K, using 0.46 %C carbon steel specimens with butt joint. The main results obtained are as follows : (1) The impact value of the weld interface at the room temperature is apporoximately 30 % lower and at the upper shelf nearly 50 % lower than that of the parent material. (2) The deformation and crack propagation energy in the weld interface over the room temperature is remarkably small in comparison with that of the parent material. (3) Both the energy and fracture appearance transition temperature of the weld interface are higher than the transition temperatures of the parent material and the room temperature. (4) The absorption energy at the heat affected zone is in all regions extremely larger than absorbed energy of the parent material. The transition temperature is the lowest. (5) The impact bending strength is in the order of the heat affected zone, weld interface and parent material, regardless of the test temperature, but these strengths become the maximum around the highest temperature, where 100 % brittle fracture occur.
一般社団法人日本機械学会の論文
1991-10-25