Effects of deformation temperature on dynamic recrystallization of 7A04-T6 alloy

摘要：

　　The influences of deformation temperature on microstructure dynamic recrystallization of 7A04-T6 ultra-high strength aluminium alloy by isothermal compression experiments in different deformation temperature on the 6300KN extrusion press.The experimental results show that both tensile strength and elongation increased with deformation temperature increasing.At 480℃,tensile strength reached 582Mpa and elongation increase to 9%.In the experiment,dynamic recrystallization of 7A04 aluminium alloy is mainly grain boundary nucleation and second phase particle nucleation.The grain size of 7A04-T6 aluminium alloy gradually refined with the deformation temperature increasing.Fracture morphology showed that rupture is belong to mixed rupture of intergranular and transgranular.With the deformation temperature increase to 480℃,grain size become small,the dimple in the fracture increase gradually,and existing the second phase particle in the dimple.

关键词： dynamic recrystallization ultrahigh strength aluminium alloy mechanical properties microstructure

作者: Jian Min Yu Zhi Min Zhang Qiang Wang Bao Hong Zhang

作者单位: North University of China, School of Material Science and Engineering, Taiyuan, 030051, China Engineering Research Centre of Magnesium-base Material Processing Technology, Ministry of Education,

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 121-125

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）