Deformation Behavior of Cu-8wt%Ag Alloy during Equal Channel Angular Pressing

Abstract:

The shear deformation behavior of the course-grained Cu-8wt%Ag alloy processed by one pass of equal channel angular pressing (ECAP) was revealed through the metallurgical microscope and the scanning electron microscope. Through the macro-level and micro-level synthesis analysis, it is confirmed that there are two shear deformation during the ECAP processing: the one along the intersection plane (IP) and the other along the vertical plane to the IP. And it is estimated that theoretical ranges of two shear angles are-32°<θ₁<0° and 43°<θ₂<58° respectively. Finally, it is also proved that the evolution of the shear bands is affected by the parallel and vertical shear to the IP of the ECAP die, and that, besides the shear along the IP, the shear along the vertical plane to the IP also plays an important role during the plastic deformation.

• Periodical: Advanced Materials Research (Volume 1101)
• Pages: 93-98
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1101.93
• Online since: April 2015
• Authors: Yue Shen*, Chuan Ting Ren, Guo Quan Zhang, Ming Xie, Ming Wen, Qi Bing Cheng, Wei Ming Guan
• Keywords: Cu-8wt%Ag Alloy, Equal Channel Angular Pressing, Shear Deformation

References

[1] K. Sitarama Raju, V. Subramanya Sarma, A. Kauffmann, et al. High Strength and Ductile Ultrafine-grained Cu–Ag Alloy through Bimodal Grain Size, Dislocation Density and Solute Distribution. Acta Materialia, vol. 61, p.228–238, (2013).

DOI: 10.1016/j.actamat.2012.09.053

[2] X. H An, S. D Wu, Z. F Zhang. Influnece of Stacking Fault Energy on the Microstructures, Tensile and Fatigue Properties of Nanostructured Cu-Al Alloys [J]. Acta Metallurgica Sinica, vol. 50, no. 2, pp.191-201, (2014).

[3] X. Y Liu, X Zhao, X Yang, et al. The Evolution of Hardness Homogeneity in Hommercially Pure Ti Processed by ECAP [J]. Journal of Wuhan University of Technology (Materials Science Edition), vol. 29, no. 3, pp.578-584, (2014).

DOI: 10.1007/s11595-014-0960-1

[4] W. K Wang, Y. P Song, D. S Gao, et al. Experimental and Finite Element Analyses of Plastic Deformation in the Compressive Stage of Copper in High-pressure Torsion [J]. Rare Metal Materials and Engineering, vol. 42, no. 2, pp.301-303, (2013).

[5] G. C Ren, G. Q Zhao. Effects of Deformation Temperature on Deformation Behavior of AZ31 Magnesium Alloy During Equal Channel Angular Pressing[J]. The Chinese Journal of Nonferrous Metals, vol. 23 , no. 7, pp.1789-1795, (2013).

[6] Hyun C Y, Kim H K. Grain Size Dependence of Flow Stress in ECAPed Ti with Constant Texture[J]. Trans. Nonferrous Met. Soc. China, vol. 22, p.673−s677, (2012).

DOI: 10.1016/s1003-6326(12)61784-1

[7] W. Skrotzki, L.S. Tóth, B. Klöden, etc. Texture after ECAP of a Cube-oriented Ni Single Crystal. Acta Materialia, vol. 56, pp.3439-3441, (2008).

DOI: 10.1016/j.actamat.2008.03.017

[8] Z. H Liu, L. W Chen, J Xi. Dislocation Refinement Mechanism of High Stacking Fault Energy 7003 Al alloy during ECAP deformation [J]. Rare Metal Materials and Engineering, vol. 42, no. 7, pp.1407-1410, (2013).

[9] Young G. K, Seung N, Byung U. L, et al. Mechanical and Electrical Responses of Nanostructured Cu-3wt. %Ag Alloy Fabricated by ECAP and Cold Rolling. Journal of Alloys and Compounds, vol. 50, no. 4, p.448–451, (2010).

DOI: 10.1016/j.jallcom.2010.02.198

[10] W Wei. Investigation on Fabrication, Investigation on Fabrication Microstructure and Mechanical Properties of Bulk Ultrafine-grained Copper[D]. Nanjin: Nanjing University of Science and Technology, (2004).

[11] J. M Wang, K. K Zhou and J Lu. Influence of Stacking Fault Energy on Grain Refinement During Severe Shear Deformation[J]. Chiese Journal of Mechanical Engineering, vol. 44, no. 11, pp.126-131, (2008).

DOI: 10.3901/jme.2008.11.126

[12] Segal V M. Equal Channel Angular Extrusion: From Macro-mechanics to Structure Formation[J]. Materials Science Engineering A, pp.271-322, (1999).

DOI: 10.1016/s0921-5093(99)00248-8

[13] Y. Z Tian, Q. Q Duan, H. J Yang, et al. Effects of Route on Microstructural Evolution and Mechanical Properties of Cu-8 wt Pct Ag Alloy Processed by Equal Channel Angular Pressing[J]. Metallurgical and Materials Transaction A, vol. 41, pp.2290-2303, (2010).

DOI: 10.1007/s11661-010-0313-4

[14] W. Z Han, Z. F Zhang, S. D Wu, et al, The Nature of Shear Flow Lines in ECAPed Metals and Alloys[J]. Philos. Mag. Lett, vol. 87, pp.735-741, (2007).

[15] W. Z Han, H. J Yang, X. H An, et al, Evolution of Initial Grain Boundaries and Shear Bands in Cu Bicrystals During One-pass Equal Channel Angular Pressing[J]. Acta Mater, vol. 57, pp.1132-1146, (2009).

DOI: 10.1016/j.actamat.2008.11.001