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归再时效(Retrogression and re-ageing,RRA).合金通过回归处理,回溶第一级时效中小于临界尺寸的微结构,尔后再时效,使晶界上形成T7状态不连续分布相,而晶内形成T6状态弥散分布的高密度亚稳相,因而合金的强度高,耐蚀性好[66].冯迪等[67]研究7055铝合金经RRA热处理后的显微组织,结果表明晶内第二相细小高密度分布,晶界断续分布,是典型的高强抗应力腐蚀组织特征.经三...中厚板的厚向组织及性能均匀性的影响[J]. 有色金属学报, 2015, 25(11): 3000-3010. FENG Di, ZHANG Xin-ming, LIU Sheng-dan. Effect of non-isothermal retrogression and re-ageing on through-thickness homogeneity of microstructure......
and re-ageing) process[J]. Materials Transactions, JIM, 1989, 30(8): 601-607. [14] Joachim W, Theo H, Sannakaisa V. Influence of temper and surface condition on the exfoliation behavior of high strength..., 45: 2377-2389. [2] 林高用, 张 颖. 时效制度对LC52铝合金组织与性能的影响[J]. 金属热处理, 2004, 29(10): 50-54.LIN Gao-yong, ZHANG Ying. Effects of ageing treatment on structure and properties of LC52 aluminum alloy[J]. Heat......
and Engineering, 2011: 61-63. [21] MARLAUD T, DESCHAMPS A, BLEY F, et al. Evolution of precipitate microstructures during the retrogression and re-ageing heat treatment of an Al-Zn-Mg-Cu alloy[J]. Acta Materialia...311.0 MPa和13.6%;过时效态合金的屈服强度为290.3 MPa,比峰时效态合金的屈服强度低6.7%,而伸长率则较之提高10.3%,达到15.0%. 表2 不同时效状态下合金的力学性能 Table 2 Mechanical properties of the alloys in different ageing conditions 2.2 显微组织 图1所......
-solution and re-ageing treatment on microstructure and properties of 7055 Al alloy[J]. Transactions of Materials and Heat Treatment, 2004, 25(3): 57-61. [9] 黄振宝. 双级固溶对7A55铝合金组织与力学性能的影响[D]. 长沙: 中南大学, 2006.... Retrogression and reaging treatment of 7055 type aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(5): 771-776. [3] Andreatta F, Terryn H. Corrosion behaviour of different tempers......
(17): 43-55. [14] VIANA F, PINTO A M P, SANTOS H M C, LOPES A B. Retrogression and re-ageing of 7075 aluminum alloy: microstructure characterization [J]. Journal of Materials Processing Technology... is attained by ageing for 24 h at 120 ℃, it is reasonable to accept that the majority of the precipitates are h′, as determined in the present work. 3.3 Mechanical properties The mechanical......
applications[J]. Materials Science Forum, 2006, 519/521: 1271-1278. [2] TANAKA M, HENON C, WARNER T. Microstructural evolution of a new aerospace 7XXX alloy during retrogression and re-ageing......
and dispersive precipitate caused by retrogression and re-ageing 图5 Al-Zn-Mg-Cu-0.15%Sc合金的拉伸试样断裂损伤光学显微组织 Fig.5 Tensile OM fractographs of Al-Zn-Mg-Cu-0.15%Sc alloy 图6 Al-Zn......
state reactions in Al-Zn-Mg-Cu alloys[J]. Materials Science and Engineering A, 1991, 132: 135-141. [17] FILOMENA V, PINTO A M P, HENRIQUE S, LOPES A B. Retrogression and re-ageing of 7075 aluminium alloy...合金中,对合金起着最大的强化作用. 关键词:1973合金;时效硬化;析出相;析出序列 中图分类号:TG 146.21 文献标志码:A Ageing precipitation and hardening behavior of 1973 high strength andhigh toughness aluminum alloy......
Chang-rong. The effect of retrogression and re-ageing treatments on the microstructure and properties of ultra-high-strength aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(7...-an, ZHU Bao-hong, WANG Feng, LIU Hong-wei. Investigation on strength, toughness and microstructure of an Al-Zn-Mg-Cu alloy pre-stretched thick plates in various ageing tempers[J]. Journal of Materials......
-isothermal retrogression and re-ageing on through-thickness homogeneity of microstructure and properties in 7055 aluminum alloy medium thick plate[J]. Transactions of Nonferrous Metals Society of China......