| 等径角挤压过程中材料的流变行为研究 |
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| 引用本文： | 郭廷彪,丁雨田,胡勇,袁训锋,曹军.等径角挤压过程中材料的流变行为研究[J].材料导报,2009,23(18). |
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| 作者姓名： | 郭廷彪 丁雨田 胡勇 袁训锋 曹军 |
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| 作者单位： | 兰州理工大学甘肃省有色金属新材料国家重点实验室,兰州,730050 |
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| 摘 要： | 分析了等径角挤压过程中材料流变的原因和特征,认为每道次挤压材料内部发生的剪切变形量与时间的函数曲线呈近似正态分布,适当升高温度和增加背压能有效减小难变形区,降低通道与试样接触面之间的摩擦能减小材料内部的滞变区.通过实验证明,随着挤压道次的增加,材料内部的滞变区将减小,均匀化程度会逐步提高.
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| 关 键 词： | 等径角挤压 流变 塑性变形 |
Study on the Materials Flowing and Deformation Behavior by Equal Channel Angular Pressing(ECAP) |
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| GUO Tingbiao,DING Yutian,HU Yong,YUAN Xunfeng,CAO Jun.Study on the Materials Flowing and Deformation Behavior by Equal Channel Angular Pressing(ECAP)[J].Materials Review,2009,23(18). |
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| Authors: | GUO Tingbiao DING Yutian HU Yong YUAN Xunfeng CAO Jun |
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| Affiliation: | GUO Tingbiao,DING Yutian,HU Yong,YUAN Xunfeng,CAO Jun(Key Laboratory of Gansu Provincial Advanced Non-ferrous Metal Materials,Lanzhou University of Technology,Lanzhou 730050) |
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| Abstract: | The causes of flowing and characteristics when materials pressed by equal channel angle pressing (ECAP) are analyzed.It is believed that the function curve measured by share distortion with time shows normal distribution.Improving temperature and back pressure can minish the dead zone.Decreasing the interface friction can weaken stagnant zone of the material.The result is validated that stagnant zone will decrease and uniformity improved through the experiment. |
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| Keywords: | equal channel angular pressing (ECAP) UFG plastic deformation |
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