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

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

SN - 0954-4062

IS - 3

ER -