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首页> 外文会议>International Conference on Fracture and Damage Mechanics(FDM 2007); 20070717-19; Madeira(PT) >Deformation and damage evolution of the microstructure around Ti-particles in IF steel during tensile deformation
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Deformation and damage evolution of the microstructure around Ti-particles in IF steel during tensile deformation

机译：拉伸变形过程中IF钢中Ti颗粒周围组织的变形和损伤演变

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摘要

The microstructure evolution in the deformation zone around second phase particles of IF steel sheets subjected to tensile deformation has been investigated in order to correlate it to the damage at microstructural scale. The experimental set-up consisted of a series of interrupted tensile tests which were carried out at different tensile deformations up to fracture. The microstructure of the deformed samples was investigated by EBSD analysis in which the EBSD scans were focused on the areas containing Ti (C, N) particles of cubical shape. It was found that at tensile strains below 25%, the ferrite matrix exhibited the evolution of slip bands inside specific grains depending on their crystallographic orientation although no special strain localization around the particles was observed. After 35% of tensile strain, the strain concentrates around the particles and particle-matrix decohesion was observed. The lattice rotations of the matrix surrounding the particles as well as the selective deformation of the grains are analyzed and discussed.
机译：研究了IF钢板拉伸变形后第二相颗粒周围变形区的组织演变，以便将其与组织破坏相关联。实验装置由一系列中断的拉伸试验组成，这些试验是在不同的拉伸变形直至断裂的条件下进行的。通过EBSD分析对变形样品的微观结构进行了研究，其中EBSD扫描集中在含有立方形状的Ti（C，N）颗粒的区域。已发现，在低于25％的拉伸应变下，铁素体基体根据其晶体学取向表现出特定晶粒内滑带的演变，尽管未观察到颗粒周围的特殊应变。在35％的拉伸应变后，应变集中在颗粒周围，并观察到了颗粒-基质的内聚力。分析和讨论了围绕颗粒的基质的晶格旋转以及颗粒的选择性变形。

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