| 锻造方式对7075铝合金锻件动态再结晶的影响 |
| |
| 引用本文： | 周建,张廷杰,张小明,马光来,田锋,周廉.锻造方式对7075铝合金锻件动态再结晶的影响[J].稀有金属材料与工程,2004,33(8):827-830. |
| |
| 作者姓名： | 周建 张廷杰 张小明 马光来 田锋 周廉 |
| |
| 作者单位： | 1. 东北大学,辽宁,沈阳,110004;西北有色金属研究院,陕西,西安,710016
2. 西北有色金属研究院,陕西,西安,710016 |
| |
| 基金项目： | 国家重点基础项目(G1999064908-04) |
| |
| 摘 要： | 利用金相(OM)、透射电镜(TEM)对7075铝合金热变形显微组织进行了观察。实验表明：在热锻条件下，7075铝合金完全可以发生动态再结晶并通过动态再结晶产生细小的再结晶晶粒。动态再结晶的方式为不连续动态再结晶，形核机制为亚晶转动、聚合形核；其临界应变值和加工道次有关，道次越多，临界值越低。在相同Z值下，再结晶晶粒尺寸随着应变的增加而减小。弥散的第二相粒子在动态再结晶过程中起了重要作用。
|
| 关 键 词： | 7075铝合金 动态再结晶 临界应变 第二相粒子 |
| 文章编号： | 1002-185X(2004)08-0827-04 |
| 修稿时间： | 2003年1月7日 |
The Influence of Forge Mode on Dynamic Recrystallization for 7075 Aluminum Alloy during Forging |
| |
| Zhou Jian,Zhang Tingjie,Zhang Xiaoming,Ma Guanglai,Tian Feng,Zhou Lian.The Influence of Forge Mode on Dynamic Recrystallization for 7075 Aluminum Alloy during Forging[J].Rare Metal Materials and Engineering,2004,33(8):827-830. |
| |
| Authors: | Zhou Jian Zhang Tingjie Zhang Xiaoming Ma Guanglai Tian Feng Zhou Lian |
| |
| Abstract: | The 7075 aluminum alloy is forged at different strain in different ways. OM(optical microscope) and TEM(transmission electric microscope) were employed to observe the microstructure of 7075 aluminum alloy after hot deformation. Experiment results indicated that 7075 aluminum can occur dynamic recrystallization under hot forging and fine grain can be obtained at the same time, whose recrystallization mechanism and nucleation mechanism are discontinuous dynamic recrystallization and subgrain rotation and polymerization respectively. Its critical strain value is related to deformation pass, the more passes are, the smaller critical strain value will become. Recrystallized grain size decreases with increase of strain, and dispersed second-phase particles play a very important role during dynamic recrystallization. |
| |
| Keywords: | aluminum alloy critical strain dynamic recrystallization second-phase particles |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
