Improving flexural strength of Ti_(2)C-Ti cermet by hot compressive deformation:Microstructure evolution and fracture behaviors

作     者：SUN FengBo WANG Shuai CHEN Xin ZHANG Rui AN Qi LIU WenQi HUANG LuJun GENG Lin 

作者机构：School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Waikato Centre for Advanced Materials and ManufacturingSchool of EngineeringUniversity of WaikatoHamilton 3240New Zealand State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Science China(Technological Sciences)》 (中国科学(技术科学英文版))

年 卷 期：2023年第66卷第11期

页      面：3298-3308页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFB3701203) the National Natural Science Foundation of China(Grant Nos.52171137,52071116,52192593) the Heilongjiang Provincial Natural Science Foundation of China(Grant No.TD2020E001) the Heilongjiang Touyan Team Program China Postdoctoral Science Foundation(Grant No.2022M710939) 

主　　题：cermet sub-stoichiometric titanium carbide hot deformation precipitate fracture behavior 

摘      要：In order to improve the microstructure and mechanical properties,the hot compressive deformation with 50%height reduction at 1100℃was conducted on a Ti_(2)C-Ti *** results showed that the lamellar Ti precipitates in Ti_(2)C grains were transformed to bimodal size distribution,which was approximately 290 nm and 5.8μm in diameter,respectively,after the hot *** bimodal Ti precipitates suppressed{011}cleavage surfaces of Ti_(2)C during flexural fracture,which resulted in an 18.5%increment of *** phenomenon can be attributed to the bimodal Ti precipitates that decreased the average crack driving force due to their gentle variation in elastic modulus compared with the monolithic lamellar Ti *** present work can guide further deformation and mechanical property improvement of Ti_(2)C cermets.