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| 高纯多晶铝的动态再结晶 | |
| 引用本文： | 蒋树农,刘楚明,李慧中,张新明. 高纯多晶铝的动态再结晶[J]. 中南大学学报(自然科学版), 2004, 35(6): 935-940 |
| 作者姓名： | 蒋树农 刘楚明 李慧中 张新明 |
| 作者单位： | 中南大学,材料科学与工程学院,湖南,长沙,410083 |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | 将99.992%高纯多晶铝在533～773 K时以0.002～2.000 s-1的应变速率压缩到其真应变为0.92.采用真应力-真应变曲线以及偏光金相和透射电镜研究高纯铝高温塑性变形特征,研究了形变条件对高纯铝动态软化机制的影响.研究结果表明:高纯铝的动态软化机制与Zenner- Hollomon参数Z密切相关,当Z较大时,试样仅发生动态回复;Z处于中间值时,发生连续动态再结晶;Z较小时,发生不连续动态再结晶,但真应力-真应变曲线未出现波动. |
| 关 键 词： | 高纯铝 Zenner- Hollomon参数 高温变形 再结晶 |
| 文章编号： | 1672-7207(2004)06-0935-06 |
| 修稿时间： | 2004-05-19 |
Dynamic Recrystallization of High Purity Polycrystalline Aluminum |
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| JIANG Shu-nong,LIU Chu-ming,LI Hui-zhong,ZHANG Xin-ming. Dynamic Recrystallization of High Purity Polycrystalline Aluminum[J]. Journal of Central South University:Science and Technology, 2004, 35(6): 935-940 | |
| Authors: | JIANG Shu-nong LIU Chu-ming LI Hui-zhong ZHANG Xin-ming |
| Abstract: | Specimens of high purity Aluminum of 99.992% grade were hot compressed to a true strain of 0.92 at 533773 K and with strain rates of 0.0022.000 s~(-1). The dynamic restoration mechanisms were examined by the true stress-true strain curves, polarized microscopy and transmission electron microscopy. The effect of parameter Z (Zener-Hollomom parameter) on the restoration mechanisms of high purity aluminum was investigated. The results show that only dynamic recovery occurs when parameter Z is high; continuous dynamic recrystallization occurs when parameter Z is intermediate, and discontinuous dynamic recrystallization takes place if parameter Z is low. But the true stress-true strain curve does not accompany stress oscillation when discontinuous dynamic recrystallization occurs. |
| Keywords: | high purity aluminum Zenner-Hollomon parameter hot deformation recrystallization |
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