等径角挤压法制备亚微米2A12铝合金块体材料
Alloy by Equal Channel Angular Pressing
摘 要
采用等径角挤压技术对2A12铝合金在室温下进行挤压变形.用TEM、SEM观察了材料的微观结构,并测试了挤压过程中强度、硬度的变化.结果表明:两次挤压可以使2A12铝合金的平均晶粒尺寸从5μm减小到200nm左右,晶粒细化效果明显.材料经等径角挤压一次后,σb、σ0.2和硬度分别提高了70％、60％和50％.
晶粒细化
亚微米结构
equal channel angular pressing
grain refinement
sub-microstructure
Abstract
Equal channel angular pressing(ECAP) was carried out on 2A12 aluminum alloy at room temperature.The microstructure in different ECAP times was observed by TEM and SEM.The mechanical properties such as tensile strength,proof stress and hardness were also tested.The ECAP successfully refined the grain size to 200nm only after two times of ECAP.Moreover,σb,σ0.2 and hardness had also improved by 70％,60％ and 50％ respectively.
中图分类号 TG146
所属栏目
基金项目 山东省科技攻关项目(032050115)
收稿日期 2004/9/23
修改稿日期 2004/12/15
网络出版日期
作者单位点击查看
备注王素梅(1979-),女,山东郓城人,硕士研究生.
引用该论文: WANG Su-mei,SUN Kang-ning,BI Jian-qiang,LIU Rui. Alloy by Equal Channel Angular Pressing[J]. Materials for mechancial engineering, 2006, 30(1): 42～45
王素梅,孙康宁,毕见强,刘睿. 等径角挤压法制备亚微米2A12铝合金块体材料[J]. 机械工程材料, 2006, 30(1): 42～45
被引情况:
【1】窦世涛,郑 林,张朝晖,张 津,计鹏飞,何长光,彭正坤,肖 勇, "短波长X射线衍射法测试纳米铝块体的内部残余应力",机械工程材料 40, 97-100(2016)
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参考文献
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【2】Iwahashi Y,Horita Z,NemotoM,et al.The process of grain refinement in equal-channel angular pressing[J].Acta Materialia,1998,46:3317-3331.
【3】Shan A,Moon I,Park J,et al.Direct observation of shear deformation during equal channel angular pressing of pure aluminum[J].Scripta Materialia,1999,41:353-357.
【4】Nieh T G,Hsiung L M,Wadsworth J,et al.High strain rate superplasticity in a continuously recrystallized Al-6%Mg-03%Sc alloy[J].Acta Materialia,1998,46:2789-2800.
【5】Yamashita A,Yamaguchi D,Horita Z,et al.Influence of pressing temperature on microstructural development in equal--channel angular pressing[J].Materials Science and Engineering A,2000,287:100-106.
【6】Chung C S,Kim J K,Kim H K,et al.Improvement of high-cycle fatigue life in a 6061 Al alloy produced by equal channel angular pressing[J].Materials Science and Engineering A,2002,337:39-44.
【7】Hiroki Akamatsu,Takayoshi Fujinami,Zenji Horita,et al.Influence of rolling on the superplastic behavior of an Al-Mg-Sc alloy after ECAP [J].Scripta Materialia,2001,44:759-764.
【8】Murayama M,Horita Z,Hono K.Microstructure of two-phase Al-1.7 at% Cu alloy deformed by equal-channel angular pressing[J].Acta Materialia,2001,49:21-29.
【9】Lee S,Furukawa M,Horita Z,et al.Developing a superplastic forming capability in a commercial aluminum alloy without scandium or zirconium additions[J].Materials Science and Engineering A,2003,342:294-301.
【10】郑立静,邓江宁,张 焱.采用ECAP制备亚微米晶铝合金及其力学性能[J].东北大学学报(自然科学版),2002,23(7):694-696.
【11】石德柯.材料科学与基础[M].北京:机械工业出版社,1999.
【12】蒙多尔福.铝合金的组织与性能[M].北京:冶金工业出版社,1988.
【13】李永霞,张永刚,陈昌麟,等.截面通道角变形挤压对高纯铝微观组织及力学性能的影响[J].航空材料学报,2001,(3):33-38.
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