Effect of Ni on the mechanical and corrosion properties of TiC-reinforced steel matrix composites

被引:3
作者
Li, Jiaxin [1 ]
Wang, Xiang [1 ]
Li, Hui [1 ]
Jia, Peng [2 ]
Cheng, Minghui [1 ]
机构
[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Coll Mech & Elect Engn, 145 Nantong St, Harbin 150001, Peoples R China
来源
MATERIALS TODAY COMMUNICATIONS | 2024年 / 41卷
关键词
TiC-reinforced steel matrix composites; Ni alloying element; Mechanical properties; Corrosion mechanism; INTERGRANULAR CORROSION; CU; BEHAVIOR; ALLOY; MICROSTRUCTURE; DISLOCATION;
D O I
10.1016/j.mtcomm.2024.110274
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Particle-reinforced steel matrix composites typically lead to a decrease in corrosion resistance while enhancing mechanical properties. However, steel matrix composites for marine applications require superior mechanical properties and corrosion resistance. In this study, 8 vol% TiC/Fe-C composites were prepared using the master alloy method. The effects of Ni contents (0, 1.2 wt%, 1.6 wt%, 2.0 wt%, and 2.4 wt%) on the mechanical and corrosion properties of the composites were evaluated. Results indicated that the tensile strength, elongation, and corrosion resistance of the composites initially increased and then decreased with increasing Ni content. The C UTS and epsilon f f of Ni2.0 composites increased from 536 MPa and 4.1 % for Ni0 to 1100 MPa and 9.0 %, respectively. The i corr and corrosion rate of the Ni2.0 composite were 0.440 mu A/cm2 2 and 0.0057 mm/year, respectively. The mechanical properties and corrosion resistance of TiC particle-reinforced steel matrix composites were simultaneously enhanced by the addition of 2.0 wt% Ni. The increase in strength is mainly attributed to changes in thermal mismatch resulting from Ni addition, solid solution strengthening of the Fe-Ni solid solution, and improved interface compatibility between the TiC particles and the matrix, thus enhancing load transfer efficiency. The increase in plasticity can be attributed to the significant improvement in interface deformation compatibility with Ni addition. The increase in corrosion resistance primarily results from the steel matrix alloying, uniform distribution of TiC particles, and strong interface bonding between the particles and the matrix.
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页数:11
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