有色金属科学与工程2017，Vol.8Issue(3)：48-53,6.DOI:10.13264/j.cnki.ysjskx.2017.03.008
工业化制备7050铝合金厚板显微组织与力学性能
Microstructure and tensile properties of industrially prepared 7050 aluminum alloy thick plate
摘要
Abstract
The microstructure and tensile property of industrially prepared 7050 aluminum alloy thick plate were investigated by means of optical microscopy (OM),transmission electron microscopy (TEM) and tensile test.The distribution of grain size in the alloy was uneven,with parts of coarse grains.The size and quantity of coarse grains and the degree of grain size inhomogeneity in the central layer were higher than those in the surface and quarter layer.After the two-step aging,the main precipitation phases of the alloy were η phase,phase and a small amount of GP Ⅱ region.Discontinuous precipitation and precipitation free zone (PFZ) was found in the grain boundaries.The precipitation density in the surface layer was greater than that in the quarter and center layer.The gradient distribution of the hardness and tensile properties along with the thickness direction were found.The strength,hardness and elongation in the surface were higher than those in the quarter and center layer.关键词
7050铝合金厚板/不均匀性/析出相/强度Key words
7050 alloy thick plate/inhomogeneity/precipitation/strength分类
矿业与冶金引用本文复制引用
王胜玉,肖柱,王正安,李周,赵子谦..工业化制备7050铝合金厚板显微组织与力学性能[J].有色金属科学与工程,2017,8(3):48-53,6.基金项目
国家重点研发计划项目(2016YFB0300803) （2016YFB0300803）
中南大学创新驱动计划支持 （）
