喷射沉积超高强铝合金自然时效行为分析  

Natural aging behavior of spray formed superhigh strength aluminum alloys

作　　者：章国伟[1] 陈刚[1] 翟景[1] 马力[1] 郭安振[1] 陈伟[1] 辛海鹰[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2013年第2期56-58,共3页Ordnance Material Science and Engineering

基　　金：宁波市自然科学基金(2011A610159)

摘　　要：研究喷射沉积超高强铝合金的自然时效时间0.25,0.5,1,2,2.5,3 a的力学与组织行为。结果表明:在前2 a内,合金的抗拉强度和屈服强度随自然时效时间的延长而增强,最大抗拉强度达到810 MPa,而伸长率则从最初的11%减少到6%;自然时效2.5 a,合金的抗拉强度减少到750 MPa,而伸长率提高到10%;时效3 a后,合金的抗拉强度增强到800 MPa,伸长率降低到8%。The natural aging behavior of spray formed superhigh aluminum alloys was researched, and the aging time was choosed as 0.25, 0.5, 1, 2, 2.5, 3 a. The results show that at the first 2 a, the tensile strength is increased as the aging time, the tensile strength is up to 810 MPa for aging time of 2 a. And the elongation is reduced as the aging time, the elongation is reduced from 11% to 6%. After 2.5 a aging, the tensile strength reduces to 750 MPa, and the elongation increases to 10%; after 3 a aging, the tensile strength increases to 800 MPa, and the elongation reduces to 8%.

关 键 词：喷射沉积 超高强铝合金 自然时效 抗拉强度 伸长率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]