A macroscopic finite element model of multi-pass cold drawing coupled with a microscopic crystal plasticity finite element model of pearlite has been established in this study.The strain distribution and strain path of the cold drawn steel wire have been simulated,and the influence of them on the materi-al strengthening have been analyzed.It is found that the plastic strain on the cross-section of the steel wire increases first and then decreases from the core to the surface after cold drawing.Meanwhile,the strain path in the core area of the steel wire is close to proportional loading,while the strain path near the surface is tortuous.The tortuous strain path can drive more slip systems to act,causing additional strengthening and ultimately increasing hardness.Under the comprehensive effect of the difference of strain and strain path in different areas of the cross-section,the subsurface hardness of the cold-drawn steel wire is the highest.
关键词
材料合成与加工工艺/应变不均匀性/晶体塑性有限元/冷拉拔钢丝/应变路径
Key words
synthesizing and processing technics for materials/non-uniformity of strain/crystal plas-ticity finite element method/cold drawn steel wire/strain path
维普
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