Crystallographic Textures Resulting from Severe Shear Deformation in Machining

Evolution of textures on surfaces created using plane strain machining (PSM) under machining-relevant thermomechanical conditions is studied and compared against that in the chips. By analyzing orientation distribution functions, it is shown that the texture on the surface is comprised of prominent and distinct fibers. By analyzing the pole figures of chips and the surface, it is shown that the two textures have features distinct from one other, even though the scale of the microstructure on the surface and the chips are traditionally considered to be comparable. In situ characterization using high speed imaging of PSM is coupled with a visco-plastic self-consistent (VPSC) model and is used to predict the pole figures in the chip and the surface. A finite element model of PSM is generated and coupled with the VPSC model to create a fully computational route for predicting textures from machining.

[1]  Helmut Schaeben,et al.  A novel pole figure inversion method: specification of the MTEX algorithm , 2008 .

[2]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[3]  R. Valiev,et al.  Textures in nanostructured metals processed by severe plastic deformation , 2003 .

[4]  Mechanics of Intermittent Plasticity Punctuated by Fracture During Shear Deformation of Mg Alloys at Near-Ambient Temperatures , 2013, Metallurgical and Materials Transactions A.

[5]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[6]  M. Shankar,et al.  Mapping subgrain sizes resulting from severe simple shear deformation , 2012 .

[7]  S. Yang,et al.  Ultrafine-grained surface layer on Mg–Al–Zn alloy produced by cryogenic burnishing for enhanced corrosion resistance , 2011 .

[8]  U. F. Kocks,et al.  The relation between macroscopic and microscopic strain hardening in F.C.C. polycrystals , 1984 .

[9]  M. Shankar,et al.  Quantifying the progression of dynamic recrystallization in severe shear deformation at high strain rates , 2013 .

[10]  Saiyi Li,et al.  Texture evolution during multi-pass equal channel angular extrusion of copper : Neutron diffraction characterization and polycrystal modeling , 2005 .

[11]  L. Schultz,et al.  Recrystallisation texture and magnetisation behaviour of some FCC Ni–W alloys , 2004 .

[12]  Ricardo A. Lebensohn,et al.  Modeling texture and microstructural evolution in the equal channel angular extrusion process , 2003 .

[13]  W. T. Roberts,et al.  Rolling textures in f.c.c. and b.c.c. metals , 1964 .

[14]  M. C. Shaw.  Metal Cutting Principles , 1960 .

[15]  U. F. Kocks,et al.  Theory of torsion texture development , 1984 .

[16]  Mark A.M. Bourke,et al.  Texture formation during equal channel angular extrusion of fcc and bcc materials: comparison with simple shear , 2005 .

[17]  Ricardo A. Lebensohn,et al.  A self-consistent anisotropic approach for the simulation of plastic deformation and texture development of polycrystals : application to zirconium alloys , 1993 .