| 等通道转角挤压(ECAP)工艺的研究进展 |
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| 引用本文： | 郭廷彪,丁雨田,胡勇,曹军,李更新.等通道转角挤压(ECAP)工艺的研究进展[J].兰州理工大学学报,2008,34(6). |
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| 作者姓名： | 郭廷彪 丁雨田 胡勇 曹军 李更新 |
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| 作者单位： | 兰州理工大学,甘肃省有色金属新材料重点实验室,甘肃,兰州,730050 |
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| 摘 要： | 对等通道转角挤压技术的基本原理和近年来的最新研究进展进行综述. 对挤压过程中晶粒细化机理和变形机理、影响挤压效果的因素分析认为,降低挤压温度、增加背压、减小入口摩擦并适当加大出口摩擦可以有效增加材料组织的均匀性. 认为ECAP加工后材料内部大角度晶界数的增加导致变形机制的改变,晶界滑移导致晶粒转动趋势的增加,这2方面的原因是产生超塑性的主要原因. 提出从单晶材料的织构层面揭示材料的微观组织演变及定量计算多晶体的宏观性质是今后的研究方向.
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| 关 键 词： | 等通道转角挤压 超细晶 塑性变形 |
Research progressing of technology of equal-channel angular pressing(ECAP) |
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| GUO Ting-biao,DING Yu-tian,HU Yong,CAO Jun,LI Geng-xin.Research progressing of technology of equal-channel angular pressing(ECAP)[J].Journal of Lanzhou University of Technology,2008,34(6). |
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| Authors: | GUO Ting-biao DING Yu-tian HU Yong CAO Jun LI Geng-xin |
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| Institution: | GUO Ting-biao,DING Yu-tian,HU Yong,CAO Jun,LI Geng-xin(State Key Lab.of Gansu Advanced Non-ferrous Metal Materials,Lanzhou Univ.of Tech.,Lanzhou 730050,China) |
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| Abstract: | The principle of equal-channel angular pressing(ECAP),and its recent research progressing were summarized.It was recognized from the analysis of refinement mechanism of grain size,the deformation mechanism of materials,and the influencing factors on pressing effect that the structural uniformity of materials could effectively be improved by means of decreasing the pressing temperature,increasing the back pressure,decreasing the inlet friction,and increasing appropriately the outlet friction.It was also reco... |
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| Keywords: | equal-channel angular pressing ultra-fine grain plastic deformation |
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