The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2018
Filed:
Sep. 25, 2014
East China University of Science and Technology, Shanghai, CN;
Shanghai Electric Power Equipment Co., Ltd. Shanghai Steam Turbine Factory, Shanghai, CN;
Fuzhen Xuan, Shanghai, CN;
Haitao Wang, Shanghai, CN;
Qiongqi Wang, Shanghai, CN;
Linbo Mei, Shanghai, CN;
Xia Liu, Shanghai, CN;
Yuhui Huang, Shanghai, CN;
EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shanghai, CN;
SHANGHAI ELECTRIC POWER EQUIPMENT CO., LTD. SHANGHAI STEAM TURBINE FACTORY, Shanghai, CN;
Abstract
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.