Al-Mg-Si合金挤压板材低温拉伸变形过程中表面晶粒滑移行为研究
Study on Slip Behaviour of Surface Grains in an Al-Mg-Si Alloy Extruded Sheet during Tensile Deformation at Cryogenic Temperature
许泽兵 1苏丽萍 2王华春 2郝成罡 1陆科呈1
作者信息
- 1. 广西科学院,南宁 530031
- 2. 广西国潮铝业有限公司,南宁 530031
- 折叠
摘要
在77K低温下对Al-Mg-Si合金挤压板材进行断续拉伸试验,在每个变形步骤之后,通过电子背散射衍射(EBSD)对同一区域进行扫描,获得不同变形量之后的晶体学特征,以研究样品表面晶粒变形行为.结果显示,拉伸试验后,不同取向的晶粒表面形貌有明显区别,最大施密特因子(Schmid factor)和激活的滑移系统数量在变形行为中起着至关重要的作用.
Abstract
Interrupted tensile tests were performed on an Al-Mg-Si alloy extruded sheet at cryogenic temperature of 77 K.After each deformation step,the crystallographic feature of the sample in a same area were obtained by Electron Backscatter Diffraction(EBSD)for different deformation extent,so as to study the grain deformation behavior on the surface of the sample.The results show that the surface topography for grains of different orientations is obviously different after the tensile test,and the maximum Schmid factor and the number of activated slip systems play a crucial role in the deformation behavior.
关键词
铝合金/低温变形/表面形貌/施密特因子Key words
aluminium alloy/cryogenic deformation/surface topography/Schmid factor引用本文复制引用
基金项目
广西重点研发项目(桂科AB24010123)
广西重点研发项目(桂科AB23026059)
出版年
2024
NETL
NSTL
万方数据