Effect of Parallel Tubular Channel Angular Pressing ( PTCAP ) Passes on the Mechanical Properties of Copper Tube

Commercially pure copper samples were successfully deformed by parallel tubular channel angular pressing (PTCAP) up to different passes at room temperature. The effects of the PTCAP number of passes on the microstructure, mechanical properties, microhardness and wear resistance of the processed samples were fully investigate. The microstructure of processed samples were observed by SEM and showed notable decrease in the grain size with increase number of passes. The mechanical properties of the pure copper in each pass were studied by tensile testing and microhardness method at room temperature. In this respect, UTS, σ0.2% and microhardness have been markedly improved from 199.03, 102.17 MPa and 67.83 HV as the annealed condition to 331.40, 293.51 MPa and 144.03 HV after the forth pass, respectively. Besides, the elongation percent were decreased while, the wear resistance improved with increased number of PTCAP passes. Ductile fracture with extensive necking zone and many big dimples occurs in annealed samples, while fine dimples were decreased with the deformation final passes of PTCAP processed samples.

[1]  F. Fang,et al.  Microstructure , 2019, CIRP Encyclopedia of Production Engineering.

[2]  G. Faraji,et al.  Evaluation of the microstructure and mechanical properties of the ultrafine grained thin-walled tubes processed by severe plastic deformation , 2015, Metals and Materials International.

[3]  A. Shokuhfar,et al.  Segmentation of copper alloys processed by equal-channel angular pressing , 2015 .

[4]  F. Djavanroodi,et al.  Experimental investigation of three different tube equal channel angular pressing techniques , 2015 .

[5]  M. Lewandowska,et al.  The electrical conductivity of CuCrZr alloy after SPD processing , 2014 .

[6]  G. Faraji,et al.  Ultrasonic assisted tubular channel angular pressing process , 2014 .

[7]  E. A. Gadallah,et al.  Effect of tin content and ECAP passes on the mechanical properties of Cu / Sn alloys , 2014 .

[8]  J. Cabrera,et al.  Mechanical, microstructural and electrical evolution of commercially pure copper processed by equal channel angular extrusion , 2013 .

[9]  G. Faraji,et al.  TEM analysis and determination of dislocation densities in nanostructured copper tube produced via parallel tubular channel angular pressing process , 2013 .

[10]  G. Faraji,et al.  Parallel tubular channel angular pressing (PTCAP) as a new severe plastic deformation method for cylindrical tubes , 2012 .

[11]  M. I. A. E. Aal,et al.  The effect of the pre-homogenization treatment on the fracture characteristics and wear properties of ECAPed Al–Cu alloys , 2012 .

[12]  L. Kunz.  Mechanical Properties of Copper Processed by Severe Plastic Deformation , 2012 .

[13]  L. Kunz,et al.  Mechanical properties of copper processed by Equal Channel Angular Pressing - a review , 2011 .

[14]  G. Faraji,et al.  Tubular channel angular pressing (TCAP) as a novel severe plastic deformation method for cylindrical tubes , 2011 .

[15]  M. Ketabchi,et al.  Nano-grained pure copper with high-strength and high-conductivity produced by equal channel angular rolling process , 2011 .

[16]  N. Tsuji,et al.  Continuous bending-drawing process to manufacture the ultrafine copper wire with excellent electrical and mechanical properties , 2011 .

[17]  M. Mohebbi,et al.  Accumulative spin-bonding (ASB) as a novel SPD process for fabrication of nanostructured tubes , 2010 .

[18]  Xiaolei Wu,et al.  Influence of processing temperature on microstructure and microhardness of copper subjected to high-pressure torsion , 2010 .

[19]  R. D. Mercado-Solis,et al.  Tribological behaviour of cast hypereutectic Al–Si–Cu alloy subjected to sliding wear , 2009 .

[20]  O. Bouaziz,et al.  Severe plastic deformation of metals by high-pressure tube twisting , 2009 .

[21]  E. Pereloma,et al.  Grain Size, Misorientation, and Texture Evolution of Copper Processed by Equal Channel Angular Extrusion and the Validity of the Hall–Petch Relationship , 2007 .

[22]  I. Hussainova,et al.  Microstructure and properties development of copper during severe plastic deformation , 2007 .

[23]  R. Valiev,et al.  Principles of equal-channel angular pressing as a processing tool for grain refinement , 2006 .

[24]  E. Pereloma,et al.  Strain hardening behaviour and deformation kinetics of Cu deformed by equal channel angular extrusion from 1 to 16 passes , 2006 .

[25]  J. Radzikowska.  Metallography and Microstructures of Cast Iron , 2004 .

[26]  T. Langdon,et al.  A model investigation of the shearing characteristics in equal-channel angular pressing , 2003 .

[27]  J. Weertman,et al.  Cyclic softening of ultrafine grain copper , 1998 .

[28]  E. Viegas.  Grain Size , 1998 .

[29]  V. Segal.  Materials processing by simple shear , 1995 .

[30]  H. Abrams.  Grain size measurement by the intercept method , 1971 .

[31]  E. Hall,et al.  The Deformation and Ageing of Mild Steel: III Discussion of Results , 1951 .