Microstructure and Mechanical Properties of High Purity Aluminum Processed by Equal Channel Angular Pressing

LIU Guo-xin; WEI Wei; WEI Kun-xia

Materials and Mechanical Engineering > 2008 > 32(6): 66-69.

LIU Guo-xin, WEI Wei, WEI Kun-xia. Microstructure and Mechanical Properties of High Purity Aluminum Processed by Equal Channel Angular Pressing[J]. Materials and Mechanical Engineering, 2008, 32(6): 66-69.

Citation:

PDF (1263 KB)

Microstructure and Mechanical Properties of High Purity Aluminum Processed by Equal Channel Angular Pressing

More Information

Received Date: November 08, 2007

Graphical Abstract

Abstract

Abstract

The microstructure and mechanical properties of high purity aluminum processed by equal channel angular pressing (ECAP) after 1,2,4,8,12 and 16 passes were investigated by optical microscope (OM),transmission electron microscope (TEM) and tensile tests at room temperature.It is shown that grains could be remarkably refined with the occurrence of dynamic recovery and dynamic recrystallization during ECAP.The strength reached a maximum value after 2 passes,and then decreased with the passes,and finally approached to a saturated value.The elongation had a minimum value of 35.88% after 1 pass,then it increased with the passes and reached the similar value of annealing state after 12 passes.The strain softening was contributed to the dynamic recovery and dynamic recrystallization during ECAP process.
- equal channel angular pressing(ECAP),
- high purity Al,
- mechanical property,
- strain softening

FullText(HTML)

References (20)

References

[1]	Ruslan Z Valiev,Terence G Langdon.Principles of equalchannel angular pressing as a processing tool for grain refinement[J].Progress in Materials Science,2006,51:881-981.
[2]	魏伟,陈光.ECAP等径角挤压变形参数的研究[J].兵器材料科学与工程,2002,25(6):61-63.
[3]	Zhao Y H,Liao X Z,Jin Z,et al.Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing[J].Acta Mater,2004,52:4589-4599.
[4]	Gubicza J,Chinh N Q,Horita Z,et al.Effect of Mg addition on microstructure and mechanical properties of aluminum[J].Materials Science and Engineering,2004,A387/389:55-59.
[5]	Chinh N Q,Horvath G,Horita Z,et al.A new constitutive relationship for the homogeneous deformation of metals over a wide range of strain[J].Acta Mater,2004,52:3555-3563.
[6]	Wang Jing Tao,Wei Wei,Zhang Yue,et al.An investigation on softening in constitutive relationship of metals at high strain level[C]//[s.l.]:Ultrafine Grained Materials IV,2006:89-96.
[7]	Segal V M.Severe plastic deformation:simple shear versus pure shear[J].Materials Science and Engineering,2002,A338:331-344.
[8]	丁桦,赵文娟,陈荣石,等.铸态与轧制态纯铝等径角挤压变形后的组织与性能[J].机械工程材料,2006,30(12):36-39.
[9]	Segal V M.Deformation mode and plastic flow in ultrafine grained metals[J].Materials Science and Engineering,2005,A406:205-216.
[10]	Chu D,Morris Jr J W.The influence of microstructure on work hardening in aluminum[J].Acta Mater,1996,44:2599-2610.
[11]	Kong L X,Hodgson P D,Wang B.Development of constitutive models for metal forming with cyclic strain softening[J].Journal of Materials Processing Technology,1999,89/90:44-50.
[12]	蒋树农,刘楚明,李慧中,等.高纯多晶铝的动态再结晶[J].中南大学学报(自然科学版),2004,35(6):935-940.
[13]	Gourdet S,Montheillet F.Effects of dynamic grain boundary migration during the hot compression of high stacking fault energy metals[J].Acta Mater,2002,50(11):2801-2812.(上接第56页)
[14]	Dell′Agli G,Mascolo G.Low temperature hydrothermal synthesis of ZrO2-CaO solid solutions[J].Journal of Materials Science,2000,35:661-665.
[15]	Tsukada T,Venigalla S.Low-temperature hydrothermal synthesis of yttrium-doped zirconia powders[J].Journal of the American Ceramic Society,1999,82(5):1169-1174.
[16]	Stefanic G,Popovic S.Influence of pH on the hydrothermal crystallization kinetics and crystal ZrO2[J].Thermochim Acta,1997,303:31-39.
[17]	Hu Jiangtao,Wang Teri,Odom,et al.Chemistry and physics in one dimension:Synthesis and properties of nanowires and nanotubes[J].Accounts of Chemical Research,1999,32:435-445.
[18]	徐如人,庞文琴.无机合成与制备化学[M].北京:高等教育出版社,2001.
[19]	陶为华,马桂林,周丽,等.ZrO2-8 mol%Y2O3纳米晶的碱性水热法合成及其烧结体的电性能研究[J].化学学报,2003,61(12):1955-1959.
[20]	郑燕青,施尔畏.水热反应条件二氧化锆同质变体的形成[J].中国科学(E辑),2001,31(4):289-295.

Cited By

Get Citation

PDF

XML

Article views (5) PDF downloads (0)

Turn off MathJax

Article Contents

Abstract

References

Microstructure and Mechanical Properties of High Purity Aluminum Processed by Equal Channel Angular Pressing

Abstract

References

Catalog

Export File

Citation

Format

Content