摘要
采用三种等通道转角挤压 (ECAP)与热处理相结合的工艺制备了超高强度细晶 70 5 0铝合金 ,应用小角x射线散射技术定量地分析了ECAP过程中显微结构参数的变化情况 ,合理地解释了ECAP过程中力学性能的变化 ,揭示了合金强化机理 .研究发现 ,“固溶淬火 +ECAP +时效”工艺是获得高性能 70 5 0铝合金的合适工艺 ,可以使 70 5 0铝合金的抗拉强度提高到 6 77MPa ,延伸率保持在 15 %左右 .
Three processes which combined equal-channel angular pressing (ECAP) with heat treatment were applied to fabricate super-high strength fine 7050 Al alloy. Variations of microstructure parameters of precipitates in 7050 Al alloys were analyzed by using small angle x-ray scattering technique. The variations of mechanical properties and mechanism of strengthening in 7050 Al alloys were explained in the paper. Experiments discovered that 'pre-ECAP solid solution treatment and post-ECAP aging treatment' was a proper process, with which the ultimate tensile strength was increased to 677 MPa, and elongation to failure was improved to be 15% or so.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第4期1665-1670,共6页
Acta Physica Sinica
基金
国家重点基础研究发展规划 (批准号 :G19990 64 9)
国家高技术研究发展计划 (批准号 :2 0 0 1AA3 3 2 0 3 0 )资助的课题~~
