TY - JOUR
T1 - An investigation on shear banding and crystallographic texture of Ag–Cu alloys deformed by high-pressure torsion
AU - Ghosh, Pradipta
AU - Kormout, Karoline S.
AU - Todt, Juraj
AU - Lienert, U.
AU - Keckes, Jozef
AU - Pippan, Reinhard
PY - 2018/3/2
Y1 - 2018/3/2
N2 - Ag–Cu alloys of two different initial microstructures—a cast eutectic alloy (AgCu-E) and an equivolume Ag–Cu powder mixture (AgCu-P)—were deformed by high-pressure torsion. The codeformation of Ag and Cu grains led to uniform refinement and a nanolamellar microstructure for both alloys. However, the lamellar structure in AgCu-P alloys was broken at intermediate shear strains (γ > 150) by extensive shear banding. On the other hand, no shear banding was observed for AgCu-E alloy at similar microstructural refinement. At higher strains deformation induced intermixing of Ag and Cu atoms was observed. Further, three-dimensional diffraction analysis of AgCu-E alloy showed that in contrast to conventional single phase alloys, the Ag and Cu phases develop similar crystallographic texture.
AB - Ag–Cu alloys of two different initial microstructures—a cast eutectic alloy (AgCu-E) and an equivolume Ag–Cu powder mixture (AgCu-P)—were deformed by high-pressure torsion. The codeformation of Ag and Cu grains led to uniform refinement and a nanolamellar microstructure for both alloys. However, the lamellar structure in AgCu-P alloys was broken at intermediate shear strains (γ > 150) by extensive shear banding. On the other hand, no shear banding was observed for AgCu-E alloy at similar microstructural refinement. At higher strains deformation induced intermixing of Ag and Cu atoms was observed. Further, three-dimensional diffraction analysis of AgCu-E alloy showed that in contrast to conventional single phase alloys, the Ag and Cu phases develop similar crystallographic texture.
KW - crystallographic texture
KW - nanocrystalline
KW - severe plastic deformation
KW - Shear band
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85045441106&partnerID=8YFLogxK
U2 - 10.1177/0954406218761508
DO - 10.1177/0954406218761508
M3 - Article
AN - SCOPUS:85045441106
SN - 0954-4062
VL - 233.2018
SP - 794
EP - 806
JO - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
JF - Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
IS - 3
ER -