| 制备7075铝合金厚板的复合变形模式 |
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| 引用本文： | 林高用,张辉,杨立斌,林启权,彭大暑. 制备7075铝合金厚板的复合变形模式[J]. 兵器材料科学与工程, 2002, 25(4): 18-21. DOI: 10.3969/j.issn.1004-244X.2002.04.005 |
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| 作者姓名： | 林高用 张辉 杨立斌 林启权 彭大暑 |
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| 作者单位： | 1. 中南大学材料科学与工程系,湖南,长沙,410083;华中科技大学塑性成形模拟及模具技术国家重点实验室,武汉,430074;2. 中南大学材料科学与工程系,湖南,长沙,410083;3. 中南大学材料科学与工程系,湖南,长沙,410083;湘潭大学机械系,湖南,湘潭,411105 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);G1999064908; |
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| 摘 要： | 提出了一种制备7075铝合金厚板的多向锻造后再轧制的复合变形模式.结果发现,在250～350℃范围内,应变率为0.1s-1的条件下,经过多向变形后(变形系数达21.5),再进行轧制变形(变形系数达10.5),可使7075铝合金获得2～3μm的细晶组织.大变形条件下应变诱导高能位错区的形成及演变成再结晶核心是晶粒细化的组织特征;微细二相粒子对细晶组织的稳定极为重要.
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| 关 键 词： | 7075铝合金 复合变形模式 多向锻造 轧制 晶粒细化 |
| 文章编号： | 1004-244X(2002)04-0018-04 |
| 修稿时间： | 2001-11-19 |
Combination deformation mode for manufacturing ultra-thick plates of 7075 aluminum alloy |
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| LIN Gao-yong ,,ZHANG Hui ,YANG Li-bin ,LIN Qi-quan ,,PENG Da-shu. Combination deformation mode for manufacturing ultra-thick plates of 7075 aluminum alloy[J]. Ordnance Material Science and Engineering, 2002, 25(4): 18-21. DOI: 10.3969/j.issn.1004-244X.2002.04.005 |
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| Authors: | LIN Gao-yong ZHANG Hui YANG Li-bin LIN Qi-quan PENG Da-shu |
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| Affiliation: | LIN Gao-yong 1,2,ZHANG Hui 1,YANG Li-bin 1,LIN Qi-quan 1,3,PENG Da-shu 1 |
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| Abstract: | A combination large deformation mode of multidirectional forging and sequent rolling is proposed for producing high performance aluminum alloy ultra-thick plates in this paper. The experiment shows that 2～3μm fine-grained structures in 7075 aluminum alloy can be obtained when total deformation coefficient λ=32 is achieved at the range of 250-350℃ under a strain rate of about 0.1s -1 . The development of fine-grained structure can be characterized by the formation of strain-induced high energy dislocation areas and then the areas transforming into nucleuses of recrystallization under large deformation at moderate temperature. The very fine secondary particles play an important role in retaining the stability of the fine-grained structures. |
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| Keywords: | aluminum alloy combination deformation mode multidirectional forging rolling grain refinement |
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