Effect of Rolling Temperature on the Structural Refinement and Mechanical Properties of Dual-Phase Heterostructured Low-Carbon Steel

Author:

Xu Tao,Pan Zhiyi,Gao Bo,Huang Jiaxi,Chen Xuefei,Liu Yi,Xiao Lirong,Zhou HaoORCID

Abstract

Warm rolling at temperatures ranging from 25 °C to 500 °C was conducted on the dual-phase heterostructured low-carbon steel to investigate the effect of deformation temperature on the structural refinement and mechanical properties. Defying our intuition, the grain size and strength of the rolled steels do not deteriorate with the increase in deformation temperature. Warm rolling at 300 °C produces a much finer lamellar structure and higher strength than steels rolled at both room temperature and elevated temperature. It is supposed that the enhanced interactions between carbon atoms and defects (interfaces and dislocations) at 300 °C promote dislocation accumulation and stabilize the nanostructure, thus helping with producing an extremely finer structure and higher strength than other temperatures.

Funder

National Natural Science Foundation of China

Hong Kong Research Grants Council

Fundamental Research Funds for the Central Universities

Publisher

MDPI AG

Subject

General Materials Science,Metals and Alloys

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