期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.04.050
关键词
Cementite; Pearlitic steel wire; Deformation; Cold drawn
类别
资金
- Natural Science Foundation of China [51371050, 51201031, 51301038]
- Natural Science Foundation of Jiangsu Province, China [BK2011616]
Nanostructural evolution of cementite lamellae in pearlitic steel wires subjected to cold drawing remains elusive, making it difficult to understand the origin of remarkable ductility in cementite. Using high-resolution transmission electron microscopy (HRTEM), the mechanisms underlying the inelastic deformation of cementite in pearlitic steel wires were examined and elucidated. Deformation of cementite in drawing should be included in two mechanisms: (1) Dislocation mechanism: deformation in low strain pearlite should rely on the movement of dislocation. Flat-crystal cementite was broken up into several different orientation cementite particles. (2) Grain rotation mechanism: the deformation mechanism should be by the rotation of cementite particles. Cementite still keeps lamellar shape, but it was divided into a multilayer structure: central nano-crystal and outermost amorphous cementite. (C) 2014 Elsevier B.V. All rights reserved.
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