摘要
结合光学显微镜和电子背散射衍射技术,对铸态AZ80镁合金中间退火两步锻压过程中的组织演化进行了观察。采用室温拉伸实验,检测了两步锻压后样品的力学性能,并将其组织、性能同普通一步锻压工艺进行了对比。结果表明,与一步锻压后的AZ80镁合金相比,两步锻压工艺所得样品再结晶晶粒尺寸更均匀,再结晶体积分数更高,变形织构较弱;断裂延伸率从9%大幅提升至18%,抗拉强度基本保持不变。
A two-step forging process was employed lor cast AZ80 Mg alloy in the study,and the microstructure evolution ol the cast AZ80 alloy was observed by using an optical microscopy and an electron backscatter diffraction apparatus.Mechanical properties ol products obtained alter two-step forging process were detected by using a uniaxial tensile tests at room temperature.Alter the comparison ol structure and properties between two-step forging and one-step forging processes,it is found that the two-step forging process can result in the obtained product with more uniform grain size distribution after recrystallization,a higher volume fraction lor recrystallized grains,and weakened deformation texture.It is shown that the ductility at break increased from 9%to 1 8%,and the tensile strength was almost kept unchanged.
作者
郭俊成
肖振宇
杨续跃
GUO Jun-cheng;XIAO Zhen-yu;YANG Xu-yue(Department of Products and Techniques Management,Baosteel Zhanjiang Iron&Steel Co Ltd,Zhanjiang 524086,Guangdong,China;School of Materials Science and Engineering,Central South University,Changsha 410083,Hunan,China)
出处
《矿冶工程》
CAS
CSCD
北大核心
2018年第4期144-148,共5页
Mining and Metallurgical Engineering
基金
国家自然科学基金(51771230)
关键词
AZ80镁合金
两步锻压
动态再结晶
力学性能
AZ80 Mg alloy
two-step forging
dynamic recrystallization
mechanical properties
