首页|In-situ SEM characterization of fracture mechanism of TiB/Ti-2Al-6Sn titanium matrix composites after electroshocking treatment

In-situ SEM characterization of fracture mechanism of TiB/Ti-2Al-6Sn titanium matrix composites after electroshocking treatment

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In this article,in-situ scanning electron micro-scope characterization of the tensile properties of TiB/Ti-2Al-6Sn titanium matrix composite(TMC)was conducted before and after electroshocking treatment(EST).After EST,the tensile strength increased by 113.2 MPa.The effect of EST on the tensile strength and fracture behavior of TiB was investigated using in-situ characterization of the fracture morphology and crack propagation path of the matrix and TiB.Before EST,TiB fracture introduced cracks that extended into the matrix,resulting in material failure.After EST,the refined TiB improved the bearing capacity of the matrix,thereby improving TMC strength.Moreover,after EST,the cracks were introduced into the matrix,and resulting the fracture of matrix first.With an increase in the external load,cracks in the matrix were observed to propagate to TiB,and the refined TiB was fractured,detached,and pulled out,resulting in the for-mation of pores.Analyzing the propagation path of the main crack after EST showed that the deflection angle of the main crack increased.The microstructure of the frac-ture surface indicated that the fracture of the matrix was plastic,whereas that of TiB was brittle.After EST,the size and area of the dimples increased,confirming the increase in plasticity.The results revealed that the comprehensive mechanical properties of TiB/Ti-2Al-6Sn improved after EST.Hence,EST is an efficient method for tailoring the microstructures and mechanical properties of TMCs.

TiB/Ti-2Al-6SnIn-situ microstructure characterizationTensile propertiesReinforcementElectroshocking treatment(EST)

Ya-Ya Wu、Jian Zhou、Guo-Lei Han、Yan Wen、Zhou Wang、Li-Qiang Wang、Wei-Jie Lv、Le-Chun Xie、Lin Hua

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Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China

Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China

Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China

State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

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国家自然科学基金国家自然科学基金重大项目湖北省自然科学基金Knowledge Innovation Program of Wuhan-Basic ResearchApplication Foundation Frontier Project of Wuhan"Chu Tian Scholar"Project of Hubei ProvinceOverseas Expertise Introduction Project for Discipline InnovationInnovative Research Team Development Program of Ministry of Education of China

52271135922661022022CFB49220220108010101742020010601012171CTXZ2017-05B17034IRT_17R83

2024

10.1007/s12598-023-02614-4

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(6)
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