[1]魏 伟,马志俊,魏坤霞,等.T型ECAP变形纯铝微观组织与力学性能研究[J].常州大学学报(自然科学版),2015,(02):30-34.[doi:10.3969/j.issn.2095-0411.2015.02.007]
　WEI Wei,MA Zhi-jun,WEI Kun-xia,et al.Microstructure and Mechanical Properties of Pure Aluminum Processed by T-Shaped Equal Channel Angular Pressing (T-ECAP)[J].Journal of Changzhou University(Natural Science Edition),2015,(02):30-34.[doi:10.3969/j.issn.2095-0411.2015.02.007]
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T型ECAP变形纯铝微观组织与力学性能研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2015年02期
页码:
30-34
栏目:
材料科学与工程
出版日期:
2015-04-25

文章信息/Info

Title:
Microstructure and Mechanical Properties of Pure Aluminum Processed by T-Shaped Equal Channel Angular Pressing (T-ECAP)
作者:
魏 伟1; 2; 马志俊1; 魏坤霞1; 2; 杜庆柏1; 胡 静1; 2
（1.常州大学 材料科学与工程学院，江苏 常州 213164；
2.江苏省材料表面科学与技术重点实验室（常州大学），江苏 常州 213164）
Author(s):
WEI Wei1; 2; MA Zhi-jun1;  WEI Kun-xia1; 2; DU Qing-bo1; HU Jing1; 2
（1.School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China；
2. Jiangsu Key Laboratory of Materials Surface Science and Technology,Changzhou University,Changzhou 213164,China）
关键词:
T型等通道变形; 纯铝; 微观组织; 力学性能
Keywords:
T-shaped equal channel angular pressing; pure aluminum; microstructure; mechanical properties
分类号:
TG 146.21；TG 113
DOI:
10.3969/j.issn.2095-0411.2015.02.007
文献标志码:
A
摘要:
在室温下对工业纯铝进行T型等通道挤压变形(T-ECAP)，研究了挤压速度（5、12、60、120、180mm/min）和挤压道次（1道次、2道次、4道次）对纯铝微观组织与力学性能的影响。结果表明：不同挤压速度下，1道次挤压变形可以将晶粒细化到1μm以下，但是微观组织存在不均匀性；随着挤压道次的增加，晶粒逐渐细化，4道次时晶粒大小为350nm。在试样的纵向中心位置，显微硬度呈现“两端高，中间低”的漏斗状分布；随着挤压道次的增加，漏斗状的硬度分布逐渐减弱，4道次挤压变形后，硬度逐渐趋于均匀。挤压速度180mm/min时，拉伸强度呈现反常的Hall-Petch关系。随着挤压道次的增加，伸长率逐渐增大，2道次挤压变形后，拉伸强度趋于平稳。
Abstract:
Industrial pure aluminum was processed by T-Shaped equal channel angular pressing (T-ECAP) at room temperature. Microstructure and mechanical properties of the pure aluminum after the T-ECAP process with the different extrusion speed (5,12,60,120 and 180mm/min) and the different extrusion passes (1 pass,2 passes and 4 passes) were investigated. The results show that grain size could be refined into less than 1μm at different pressing speeds;however, the homogeneous microstructure was observed. With the increasing of passes, grains were gradually refined to be about 350nm after four passes. In the longitudinal center position of samples, the microhardness showed a funnel-shaped distribution of “high at both ends,low in the middle”.With the increasing of passes,the funnel-shaped distribution of microhardness weakened gradually.Microhardness tended to be uniform after four passes.The tensile strength showed an abnormal Hall-Petch relationship at the pressing speed of 180mm/min. With an increase of passes, the elongation to failure gradually increased, and the tensile strength was saturated after two passes.

参考文献/References:


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相似文献/References:

[1]魏坤霞,马志俊,魏伟,等.纯铝T型等通道变形有限元模拟研究[J].常州大学学报(自然科学版),2016,(06):68.[doi:10.3969/j.issn.2095-0411.2016.06.013]
　WEI Kunxia,MA Zhijun,WEI Wei,et al.Finite Element Analysis of Pure Aluminum Processed by T-Shaped Equal Channel Angular Pressing[J].Journal of Changzhou University(Natural Science Edition),2016,(02):68.[doi:10.3969/j.issn.2095-0411.2016.06.013]

备注/Memo

备注/Memo:
江苏省自然科学基金（BK2012594，BK20131144）；常州市国际合作项目（CZ20130021)；江苏省研究生培养创新工程项目（苏教办研\[2014\]1号）。
更新日期/Last Update: 2015-05-20