| 亚微米晶Al-3%Mn合金的超塑延展性变形行为(英文) |
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| 引用本文： | 肖旋,高慈,侯介山,郭建亭.亚微米晶Al-3%Mn合金的超塑延展性变形行为(英文)[J].中国有色金属学会会刊,2012,22(5):1035-1040. |
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| 作者姓名： | 肖旋 高慈 侯介山 郭建亭 |
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| 作者单位： | 沈阳理工大学材料科学与工程学院;中国科学院金属研究所 |
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| 摘 要： | 采用球磨法制备晶粒尺寸为0.3μm的亚微米晶Al-3%Mn(质量分数)合金。Al-3%Mn合金在室温下轧制时,表现为极高的延展性(超过2500%)。采用透射电镜(TEM)观察球磨态和冷轧态的纯铝和Al-3%Mn合金组织;采用X射线衍射对比分析组成,发现连续塑性变形机制包括位错滑移和晶界滑动,同时还有动态回复和再结晶,而动态再结晶是大塑性变形的主要控制机制。
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| 关 键 词： | 铝合金 机械合金化 冷轧 变形组织 |
| 收稿时间： | 19 April 2011 |
Superplastic extensibility deformation of Al-3%Mn alloy with submicrometer grain size |
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| XIAO Xuan,GAO Ci,HOU Jie-shan,GUO Jian-ting.Superplastic extensibility deformation of Al-3%Mn alloy with submicrometer grain size[J].Transactions of Nonferrous Metals Society of China,2012,22(5):1035-1040. |
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| Authors: | XIAO Xuan GAO Ci HOU Jie-shan GUO Jian-ting |
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| Affiliation: | 1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China; 2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | Submicrometer-grained (SMG) Al-3%Mn (mass fraction) alloy specimens with initial grain size of ~0.3 μm were produced by ball milling for 3 h. The Al-3%Mn specimens which were cold rolled with a strain rate of 1×10-3- 1×10-2 s-1 at room temperature show high extensibility to failure more than 2500%. Microstructures of pure Al and Al-3%Mn alloy at as-milled and cold-rolled state were examined using X-ray diffraction and transmission electron microscopy (TEM). Based on the microstructure analysis, it is established that the mechanism of the continued plastic deformation in SMG Al-3%Mn alloy consists of dislocation slip, grain boundary sliding companied by dynamic recovery and recrystallization, and dynamic recrystallization is a main control factor of the large plastic deformation. |
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| Keywords: | aluminium alloys mechanical alloying cold rolling deformation structure |
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