• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Texture on Deformation Mechanism of Hot Extruded Oxide Dispersion Strengthened 18Cr Ferritic Steel
【24h】

Influence of Texture on Deformation Mechanism of Hot Extruded Oxide Dispersion Strengthened 18Cr Ferritic Steel

机译：纹理对热挤出氧化物分散变形机理的影响强化18CR铁素体钢

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper focuses on studying the influence of texture on the deformation mechanism of oxide dispersion strengthened (ODS) 18Cr ferritic steel subjected to high-temperature tensile testing after consolidation by hot extrusion. The initial microstructure of the hot extruded steel showed preferential (1 1 0) planes alignment in perpendicular and parallel direction to extruded (ED) and transverse (TD), respectively. Two types of anisotropy have been highlighted: (1) A strong anisotropy of elongation properties with a transverse ductility is lower as compared to the axial ductility; (2) yield stress anisotropy (mechanical strength anisotropy) which is found to be temperature dependent. The material flow in < 1 1 1 > direction is observed during the application of load along extruded direction during the tensile test; however, (1 1 0) slip plane normal is parallel to the direction of loading for transverse direction and brings the Schmid factor to a lower level which makes slip activation unlikely. Deformation band is found to be aligned with the loading direction in the ED specimen and covering across a number of neighboring ferrite grains could be noticed irrespective of material flow. However, the areas near the grain boundaries in the microstructure are found to be the strain gradient regions. Further, it shows a preferential accommodation of strain in proximity to the boundary network for TD specimen. High temperature (973 K) tensile test in ED is found to promote grain-subdivision of elongated bands by dynamic recrystallization, and inverse pole figure distribution reveals a preferential increase in the intensity of clustering toward (1 1 1) plane parallel to the loading direction.
机译：本文研究了织构对氧化物弥散强化（ODS）18Cr铁素体钢热挤压固结后高温拉伸变形机制的影响。热挤压钢的初始组织分别在垂直和平行于挤压（ED）和横向（TD）的方向上显示出优先（10）平面排列。强调了两种类型的各向异性：（1）与轴向延展性相比，具有横向延展性的延伸性能的强各向异性较低；（2） 屈服应力各向异性（机械强度各向异性），与温度有关。拉伸试验中，沿挤压方向施加载荷时，观察到<1>方向的材料流动；然而，（1-10）滑移面法线平行于横向加载方向，并将施密德系数降低到较低水平，从而不太可能发生滑移激活。发现变形带与ED试样中的加载方向一致，并且无论材料流动如何，都可以注意到覆盖在许多相邻铁素体晶粒上的变形带。然而，微观结构中靠近晶界的区域被发现是应变梯度区域。此外，它还显示了TD试样在靠近边界网络的位置优先调节应变。ED中的高温（973 K）拉伸试验通过动态再结晶促进了拉长带的晶粒细化，相反的极图分布显示，向平行于加载方向的（1）面聚集的强度优先增加。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号