Microstructural evolution and mechanical properties on an ARB processed IF steel studied by X-ray diffraction and EBSD
Microstructural evolution and mechanical properties on an ARB processed IF steel studied by X-ray diffraction and EBSD
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DOI：
10.1016/j.matchar.2016.05.025
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发表时间：
2016-08-01
影响因子：
4.7
通讯作者：
Mendoza-Leon, Hector
中科院分区：
文献类型：
--
作者：
Cruz-Gandarilla, Francisco;Maria Salcedo-Garrido, Ana;Mendoza-Leon, Hector
累积滚压接合（ARB）是所谓的严重塑性变形（SPD）工艺之一，可以生产具有超细（微纳米）结构的金属和合金。具有超细晶粒的材料具有有吸引力的特性，例如强度和延展性同时增加。我们对这些材料的兴趣集中在它们在 ARB 加工过程中的微观结构演变，最终导致这些机械性能的增强。在当前的工作中，我们通过电子背散射衍射 (EBSD) 和 X 射线衍射 (XRD) 跟踪连续加工周期后经 ARB 变形的无间隙原子 (IF) 钢的微观结构演变。特别是，我们提出了与织构、晶粒 (GS) 和磁畴尺寸、晶界特征、几何必要位错 (GND) 密度、晶粒取向扩展 (GOS)、晶格参数、微应变、位错密度及其空间排列相关的结果。5 个 ARB 循环后，系统显示出主要由亚微米晶粒构成的微观结构，具有高角度边界和内部位错的存在率低 谷物。 (C) 2016 Elsevier Inc. 保留所有权利。
Accumulative Roll Bonding (ARB) is one of the so-called severe plastic deformation (SPD) processes, allowing the production of metals and alloys with ultrafine (micro-nano) structures. Materials with ultrafine grains present attractive properties like the simultaneous increase in strength and ductility. Our interest in these materials is focused on their microstructural evolution during ARB processing, eventually responsible for the enhancement of those mechanical properties.In the current work we follow the evolution of the microstructure in an interstitial-free (IF) steel deformed by ARB after consecutive processing cycles, by means of Electron BackScatter Diffraction (EBSD) and X-ray diffraction (XRD). Particularly, we present results related to texture, grain (GS) and domain sizes, grain boundary character, density of Geometrically Necessary Dislocations (GND), Grain Orientation Spread (GOS), lattice parameters, microstrain, dislocation density and their spatial arrangement After 5 ARB cycles the system shows a microstructure constituted mainly by submicrometric grains with high angle boundaries and low presence of dislocations inside the grains. (C) 2016 Elsevier Inc. All rights reserved.