材料工程2017，Vol.45Issue(3)：112-118,7.DOI:10.11868/j.issn.1001-4381.2015.000850
升温速率对7B04铝合金板材晶粒组织和超塑性的影响
Effect of Heating Rate on Grain Structure and Superplasticity of 7B04 Aluminum Alloy Sheets
摘要
Abstract
Fine-grained 7B04 aluminum alloy sheets were manufactured through thermo-mechanical treatment.The effects of anneal heating rate on grain structure and superplasticity were investigated using electron back scattering diffraction (EBSD) and high temperature tensile test.The results show that at the heating rate of 5.0× 10-3K/s,the average grain sizes along the rolling direction (RD) and normal direction (ND) are 28.2μm and 13.9μm respectively,the nucleation rate is 1/1000.With the increase of heating rate,the average grain size decreases,and the nucleation rate increases.When the heating rate increases to 30.0K/s,the average grain sizes along the RD and ND decrease respectively to 9.9μm and 5.1μm,and the nucleation rate increases to 1/80.Besides,with the increase of heating rate,the elongation of sheets also increases.The elongation of the specimens increases from 100％ to 730％ under the deforming condition of 773K/8× 10-4s-1.关键词
铝合金/形变热处理/升温速率/晶粒尺寸/超塑性Key words
aluminium alloy/thermo-mechanical treatment/heating rate/grain size/superplasticity分类
矿业与冶金引用本文复制引用
陈敏,叶凌英,孙大翔,杨涛,王国玮,张新明..升温速率对7B04铝合金板材晶粒组织和超塑性的影响[J].材料工程,2017,45(3):112-118,7.基金项目
国家自然科学基金资助项目(51205419) （51205419）
