光干渉法による鋼材切欠先端の塑性流動の低温域における観察

概要

論文の詳細を見る
The dependence of plastic flow process on temperature and thickness, for slit notched three point bending specimen, was investigated by continuous direct observation, using optical interference method. The relationship between the degree of plastic constraint and plastic flow process or applied load was cleared. Moreover, the cleavage fracture behaviours were discussed based on the observed plastic flow processes. Main results obtained are as follows (1) The plastic flow processes in low temperature region and the degree of plastic constraint, can be estimated by the optical interference method. (2) The state of stress triaxiality is characterized by the transition behaviour from the stage of local yielding to that of hinge type plastic flow. (3) The temperature effect on the size of plastic zone appears only at the stage of hinge type in plastic flow process. (4) In slow bend test of Charpy size specimen, the cleavage fracture occures either at stage of local yielding or after the general yield.
社団法人溶接学会の論文
1978-11-05