收稿日期: 2015-09-16
网络出版日期: 2017-06-30
基金资助
国家自然科学基金青年基金资助项目(51301102)
Effect of Cu precipitation and grain boundary on mechanical properties of microalloyed steel
Received date: 2015-09-16
Online published: 2017-06-30
李智1,2, 胡丽娟1,2, 谢耀平1,2, 赵世金1,2 . 纳米Cu析出相及晶界对微合金化钢力学性能的影响[J]. 上海大学学报(自然科学版), 2017 , 23(3) : 432 -442 . DOI: 10.12066/j.issn.1007-2861.1748
Based on the elastic plastic finite element method, a microalloyed steel model of tension including Cu precipitation is constructed. This model is introduced into the finite element analysis of tension of microalloyed steel by changing the microstructure of Cu precipitation and grain boundary. Uniaxial tensile tests are conducted under different sizes of Cu precipitation and grain, and various values of the strain. Equivalent strain-stress curves are obtained. Strengthening mechanism is learned by analyzing the distribution of stress and strain. The results show that excellent ductility takes place at the center of Cu precipitation. Both intra-granular plasticity and its strain rate are better than grain boundary. In addition, a tension test of polycrystal model contained Cu precipitation and
grain boundary also shows compatible deformation of grain boundary.
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