East China University of Science and Technology

Shanghai Electric Power Equipment Co., Ltd. Shanghai Steam Turbine Factory

Qiongqi Wang

Fuzhen Xuan

Haitao Wang

Xia Liu

Yuhui Huang

Linbo Mei

Disclosed is a method of measurement and determination on fracture toughness of structural materials at high temperature, comprising: preliminary assessing the ductility of a material based on a high-temperature uniaxial tensile test and the fracture characteristic; designing and manufacturing a CT specimen; conducting a monotonic loading fracture test on the CT specimen at high temperature; modifying a load-displacement curve output by a testing machine; determining a passivation coefficient M for the crack of the structural material; reversely recursing instant load-displacement data pairs corresponding to the instant crack length; calculating a J_R crack extension resistance curve of the tensile test; examining the validity of the J_R crack extension resistance curve and the fracture toughness J; calculating the fracture toughness per equivalent of the structural material K. The present invention overcomes the difficulty of placing an extensometer inside a high-temperature furnace.

Growing community of inventors

Shanghai, China

Qiongqi Wang