Finite element analysis of planar twist channel angular extrusion (PTCAE) as a novel severe plastic deformation method

다국어 초록 (Multilingual Abstract)

A new severe plastic deformation (SPD) method based on equal channel angular pressing (ECAP) is introduced for producing ultrafinegrains in bulk alloys, entitled as “Planar twist channel angular extrusion (PTCAE)”. In PTCAE method, there is additional angle, α, (plusφ and ψ angles in ECAP method) which represents angle associated with the lateral reversal arc of curvature in deformation zone. Threedimensional finite element method (FEM) simulations of both ECAP and PTCAE processes were performed in order to investigate theplastic deformation state of processed samples and, moreover, the effect of different die geometry (in terms of variation of planar twistangle) on plastic strain distribution and magnitude. Results revealed that PTCAE process related with ECAP process can impose higherstrain values in different shear planes simultaneously in one deformation zone. Therefore, PTCAE can produce UFG or nanostructuredmaterials better than ECAP method which has simpler design and significantly higher efficiency compared with other new SPD processes.

참고문헌 (Reference)

1 Y. Beygelzimer, "Useful properties of twist extrusion" 503 : 14-17, 2009

2 B. Talebanpour, "Upper-bound analysis of dual equal channel lateral extrusion" 30 : 1484-1489, 2009

3 R. Kocich, "Twist channel angular pressing (TCAP) as a method for increasing the efficiency of SPD" 527 : 6386-6392, 2010

4 Y. Beygelzimer, "Shears, vortices, and mixing during twist extrusion" 1 : 443-446, 2008

5 R. Z. Valiev, "Principles of equal-channel angular pressing as a processing tool for grain refinement" 51 : 881-981, 2006

6 Y. Beygelzimer, "Planar twist extrusion versus twist extrusion" 211 : 522-529, 2011

7 B. Talebanpour, "Microstructural and mechanical properties of commercially pure aluminum subjected to dual equal channel lateral extrusion" 527 : 141-145, 2009

8 K. Nakashima, "Influence of channel angle on the development of ultrafine grains in equal channel angular pressing" 46 (46): 1589-1599, 1998

9 A. Rosochowski, "Finite element analysis of two-turn Incremental ECAP" 1 : 483-486, 2008

10 E. Cerri, "FEM and metallurgical analysis of modified 6082 aluminium alloys processed by multipass ECAP: Influence of material properties and different process settings on induced plastic strain" 209 : 1550-1564, 2009

11 F. Djavanroodi, "Effect of die channel angle, friction and back pressure in the equal channel angular pressing using 3D finite element simulation" 527 : 1230-1235, 2010

12 N. Pardis, "Different processing routes for deformation via simple shear extrusion (SSE)" 527 : 6153-6156, 2010

13 A. Zangiabadi, "Development of a novel severe plastic deformation method for tubular materials:Tube channel pressing (TCP)" 528 : 5066-5072, 2011

14 N. Pardis, "Deformation behavior in simple shear extrusion (SSE) as a new severe plastic deformation technique" 527 : 355-360, 2009

15 N. Pardis, "Cyclic expansion-extrusion (CEE): A modified counterpart of cyclic extrusion-compression (CEC)" 528 : 7537-7540, 2011

16 B. Mani, "Consolidation of commercial pure aluminum powder by torsional-equal channel angular pressing (T-ECAP) at room temperature" 219 : 1-8, 2012

17 R. Z. Valiev, "Bulk nanostructured materials from severe plastic deformation" 45 : 103-189, 2000

18 M. Shamsborhan, "A planar twist channel angular extrusion (PTCAE) as a novel severe plastic deformation method based on equal channel angular extrusion (ECAE) method" SAGE Publications 228 (228): 2246-2250, 2014

19 O. Bouaziz, "A new technique for severe plastic deformation: The cone-cone method" 12 : 982-985, 2009

20 N. Q. Chinh, "A new constitutive relationship for the homogeneous deformation of metals over a wide range of strain" 52 : 3555-3563, 2004