航空材料学报2017，Vol.37Issue(6)：95-101,7.DOI:10.11868/j.issn.1005-5053.2017.000109
Al-Zn-Mg-Cu合金铣削表面变形层的微观组织和织构
Microstructure and Texture in Surface Deformation Layer of Al-Zn-Mg-Cu Alloy Processed by Milling
摘要
Abstract
The microstructural and crystallographic features of the surface deformation layer in Al-Zn-Mg-Cu alloy induced by milling were investigated by means of transmission electron microscopy (TEM) and precession electron diffraction (PED) assisted nanoscale orientation mapping.The result shows that the surface deformation layer is composed by the top surface of equiaxed nanograins/uhrafine grains and the subsurface of lamellar nanograins/uhrafine grains surrounded by coarse grain boundary precipitates (GBPs).The recrystallized nanograins/ultrafine grains in the deformation layer show direct evidence that dynamic recrystallization plays an important role in grain refining process.The GBPs and grain interior precipitates (GIPs) show a great difference in size and density with the matrix due to the thermally and mechanically induced precipitate redistribution.The crystallographic texture of the surface deformation layer is proved to be a mixture of approximate copper { 112 } 〈 111 〉,rotated cube { 001 } 〈 110 〉 and F { 111 } 〈 112 〉.The severe shear deformation of the surface induced by milling is responsible for the texture evolution.关键词
Al-Zn-Mg-Cu合金/旋进电子衍射/析出相/织构Key words
Al-Zn-Mg-Cu alloy/precession electron diffraction(PED)/precipitate/texture分类
矿业与冶金引用本文复制引用
陈艳霞,杨延清..Al-Zn-Mg-Cu合金铣削表面变形层的微观组织和织构[J].航空材料学报,2017,37(6):95-101,7.基金项目
973项目资助 （）
