制备7075铝合金厚板的复合变形模式

兵器材料科学与工程 , 2002, 25(4): 18-21. doi: 10.3969/j.issn.1004-244X.2002.04.005

制备7075铝合金厚板的复合变形模式

林高用 ^1, , 张辉 ^2, , 杨立斌 ^3, , 林启权 ^4, , 彭大暑 ^5,

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

4.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

5.中南大学材料科学与工程系,湖南,长沙,410083

基金项目: 国家重点基础研究发展计划(973计划)(G1999064908) 国家重点实验室基金(01-4)

关键词： 7075铝合金 , 复合变形模式 , 多向锻造 , 轧制 , 晶粒细化

Combination deformation mode for manufacturing ultra-thick plates of 7075 aluminum alloy

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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制备7075铝合金厚板的复合变形模式

Combination deformation mode for manufacturing ultra-thick plates of 7075 aluminum alloy

参考文献