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Enhancing the strength-ductility synergy of Fe-based composites by changing interface bonding between matrix and TiCx with various stoichiometric ratios by Xinmiao Zhong; Wen-Xin Wang; Yue Han; Xin Li; Shu-Qing Kou; Feng Qiu is a Materials Science article available to read on EtoBox.

What is Enhancing the strength-ductility synergy of Fe-based composites by changing interface bonding between matrix and TiCx with various stoichiometric ratios about?

The increase of strength in composites usually comes at the cost of ductility. This work proposed a strategy of design and synthesis of TiCx nanoparticles with controlled Ti/C stoichiometric ratios to adjust the microstructure and thus enhance the mechanical properties of the TiCx nanoparticles reinforced iron matrix composites. The changes of size and morphology of TiCx nanoparticles were investigated by self-propagating combustion synthesis (SHS) in the Fe–Ti–C reaction system. The influences of Ti/C stoichiometric ratios on the interface bonding and mechanical properties of Fe/TiCx were analyzed by lattice mismatch calculation. The results indicate that the morphology of TiCx nanoparticles changes from polyhedral to near-spherical sometimes accompanied by a few cubes with an increase in Ti/C stoichiometric ratios. The maximum yield strength (1525 MPa) compressive strength (2224 MPa) and microhardness (691.5 HV) of the TiCx/Fe composites are obtained when the C/Ti stoichiometric ratio reaches 1.0. The TiC0.8/Fe composites present a remarkable ductility up to 8.34%. Based on the lattice mismatch calculation, the good mechanical properties are mainly because the low lattice mismatc

Who reads Enhancing the strength-ductility synergy of Fe-based composites by changing interface bonding between matrix and TiCx with various stoichiometric ratios?

Author

Xinmiao Zhong; Wen-Xin Wang; Yue Han; Xin Li; Shu-Qing Kou; Feng Qiu

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Materials Science (Physical Sciences)