摘要
以超塑性5A90合金板材为对象,通过EBSD检测、金相观察等实验手段,研究其在超塑变形过程中沿标距长度方向局部应变的演变对晶粒形貌、空洞形貌的影响。结果表明:在试样标距内从断口至肩部,应变分布不均匀并呈梯度分布,靠近断口处的应变量最大;晶粒尺寸、空洞尺寸及体积分数随着局部应变量的上升而增加。
Superplastic deformation of 5 A90 alloy was carried out to study the effect of local strain developed on the microstructural evolution along the gauge length of tensile specimen by using optical techniques and electron backscatter diffraction.The results showed that the strain distribution was found to be non-uniform with more deformation towards fracture tip and less towards the shoulder section of specimen.Grain size and the volume fraction of cavity increased with the increase of local strain.
作者
李红萍
杨栋
孙泉
叶凌英
张新明
LI Hong-ping;YANG Dong;SUN Quan;YE Ling-ying;ZHANG Xin-ming(School of Materials Science and Engineering,Central South University,Changsha,410083;Key Laboratory of Nonferrous Metals Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083;Shanghai Aircraft Design and Research Institute of COMAC,Shanghai 200232,China)
出处
《铝加工》
CAS
2020年第5期14-19,共6页
Aluminium Fabrication
基金
国家重点研发计划资助项目(2016YFB0300901)
国家自然科学基金资助项目(51205419)。
