| 循环形变对超细晶铜室温拉伸行为的影响 |
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| 引用本文： | 黄崇湘,吴世丁,李广义,刘腾,姜传斌,李守新.循环形变对超细晶铜室温拉伸行为的影响[J].金属学报,2004,40(11):1165-1169. |
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| 作者姓名： | 黄崇湘 吴世丁 李广义 刘腾 姜传斌 李守新 |
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| 作者单位： | 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 |
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| 基金项目： | 国家自然科学基金资助项目50171072和50371090 |
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| 摘 要： | 研究了循环形变处理对等通道转角挤压方法(ECAP)制备的超细晶铜(UFG—Cu)室温拉伸行为的影响．与制备态相比，循环形变处理后UFG—Cu的塑性变形行为发生了明显的变化，在应力—应变曲线上出现流变应力的平台区，在此区域没有应变硬化和颈缩发生，均匀延伸率由制备态的约2％提高到约6％．探讨了该阶段变形的机制以及导致这种变化的可能因素。
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| 关 键 词： | 等通道转角挤压 超细晶铜 循环形变 拉伸行为 均匀延伸 |
| 文章编号： | 0412-1961(2004)11-1165-05 |
EFFECT OF CYCLIC DEFORMATION ON ROOM TEMPERATURE TENSILE BEHAVIORS OF ULTRAFINE GRAINED COPPER |
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| HUANG Chongxiang,WU Shiding,LI Guangyi,LIU Teng,JIANG Chuanbin,LI Shouxin
Shenyang National Laboratory for Materials Science.EFFECT OF CYCLIC DEFORMATION ON ROOM TEMPERATURE TENSILE BEHAVIORS OF ULTRAFINE GRAINED COPPER[J].Acta Metallurgica Sinica,2004,40(11):1165-1169. |
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| Authors: | HUANG Chongxiang WU Shiding LI Guangyi LIU Teng JIANG Chuanbin LI Shouxin
Shenyang National Laboratory for Materials Science |
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| Affiliation: | HUANG Chongxiang,WU Shiding,LI Guangyi,LIU Teng,JIANG Chuanbin,LI Shouxin
Shenyang National Laboratory for Materials Science,Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110016 |
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| Abstract: | Tensile behaviors of ultrafine grained copper (UFG-Cu) processed by equal channel angular pressing (ECAP) were investigated at room temperature in the as-processed state and after cyclic deformation treatment. It was found that the plastic deformation behavior of UFG-Cu after cyclic deformation treatment is obviously different from that in the as-processed state. Stress-strain curves of the cyclically deformed specimens show a steady state deformation plateau characterized by the absence of both strain hardening/softening and necking. Uniform elongation increased from 2% of the as-processed Cu to about 6% of the cyclically deformed UFG-Cu. The deformation mechanism and possible reasons responsible for this change are discussed. |
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| Keywords: | equal channel angular pressing ultrafine grained copper cyclic deformation tensile behavior uniform elongation |
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