Microstructure and nanoindentation creep behavior of TiC reinforced steel matrix composite after stabilizing heat treatments |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, PR China;2. Key Laboratory of No-ferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha, Hunan, 410083, PR China |
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| Abstract: | The microstructure and nanoindentation creep behavior of characteristic phases in TiC reinforced steel matrix composite after stabilizing heat treatments were investigated. The results showed that the microhardness of matrix increased from 4.85 ± 0.30 GPa in the annealed sample to 13.45 ± 0.71～ 16.06 ± 0.88 GPa after stabilizing heat treatments, and the apparent hardness of TiC particle was also improved due to the martensitic strengthening of matrix. The dominant creep mechanism of the composite was dislocation movement, the primary micro creep stage dominated the micro creep behavior of annealed composite and the steady state creep dominated the micro creep behavior of stabilized composites. The micromechanical properties of the characteristic phases in the composite after TCC treatment were well matched, and the overall creep resistance of that was excellent, which provided theoretical support in achieving the consistency of micromechanical properties of the composite during the stabilizing heat treatments. |
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| Keywords: | Nanoindentation creep behavior Characteristic phases Microhardness Creep mechanism |
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