An investigation on shear banding and crystallographic texture of Ag–Cu alloys deformed by high-pressure torsion

Abstract

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.

Keywords

Shear band severe plastic deformation X-ray diffraction crystallographic texture nanocrystalline

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References

Pippan

et al.

Saturation of fragmentation during severe plastic deformation. Annu Rev Mater Res 2010; 40: 319–343.

Ghosh

Renk

Pippan

. Microtexture analysis of restoration mechanisms during high pressure torsion of pure nickel. Mater Sci Eng A 2017; 684: 101–109.

Kormout

Pippan

Bachmaier

. Deformation induced supersaturation in immiscible material systems during high pressure torsion. Adv Eng Mater 2016. DOI: 10.1002/adem.201600675

Kormout

et al.

Deformation mechanisms during severe plastic deformation of a Cu-Ag composite. J Alloy Compd 2017; 695: 2285–2294.

Beyerlein

et al.

Texture evolution via combined slip and twinning in rolled Ag-Cu cast eutectic composite. Int J Plast 2011; 27: 121–146.

Carpenter

et al.

Bulk texture evolution of Cu-Nb nanolamellar composites during accumulative roll bonding. Acta Mater 2012; 60: 1576–1586.

Suresh

Rollett

Suwas

. Evolution of texture and microstructure in deformed and annealed Cu-Fe multilayer. Metall Mater Trans A 2016; 47A: 852–868.

Linde

. Lattice parameters of metastable SiverCopper alloys. J Appl Phys 1966; 37: 934–935.

Engler

Randle

. Introduction to texture analysis-macrotexture, microtexture and orientation mapping, Boca Raton, FL: CRC Press, Taylor Francis Group, 2010.

10.

Dillamore

Roberts

Bush

. Occurence of shear bands in heavily rolled cubic metals. Metal Sci 1979; 13: 73–77.

11.

Yeung

Duggan

. Flow localization in cold rolled α – brass. Mater Sci Technol 1986; 2: 552–558.

12.

Lee

Duggan

. A dislocation avalanche theory of shear banding. Acta Metall Mater 1994; 42: 857–860.

13.

Quadir

et al.

Shear banding and recrystallization texture development in multilayered Al alloy sheet produced by accumulative roll bonding. Acta Mater 2009; 57: 29–40.

14.

Semiatin

Piehler

. Formability of Sandwich sheet materials in plane strain compression and rolling. Metall Trans A 1979; 10A: 97–107.

15.

Kapp

et al.

Anisotropic deformation characteristics of an ultrafine and nanolamellar pearlitic steel. Acta Mater 2016; 106: 239–248.

16.

Liu

Zeng

Meng

. Interface structure and energy in Cu-71.8 wt% Ag. J Alloys Compd 2008; 464: 168–173.

17.

Wang

et al.

Interface facilitated deformation twinning in copper within submicron Ag-Cu multilayered composites. Scripta Mater 2011; 64: 1083–1086.

18.

Tian

Zhang

. Stability of interfaces in a multilayered Ag-Cu composite during cold rolling. Scripta Mater 2013; 68: 542–545.

19.

et al.

Atomic scale investigation of interface facilitated deformation twinning in severely deformed Ag-Cu nanolamellar composites. Appl Phys Lett 2015; 107: 011901–011901.

20.

Sauvage

Wetscher

Pareige

. Mechanical alloying of Cu and Fe induced by severe plastic deformation of Cu-Fe composite. Acta Mater 2005; 53: 2127–2135.

21.

Raabe

Ohsaki

Hono

. Mechanical alloying and amorphization in Cu-Nb-Ag in situ composite wires studied by transmission electron microscopy and atom probe tomography. Acta Mater 2009; 57: 5254–5263.

22.

Pouryazdan

et al.

Forced chemical mixing of immiscible Ag-Cu heterointerfaces using high pressure torsion. Phys Rev B 2012; 86: 144302–144302.

23.

Misra

Hirth

Hoagland

. Length scale dependent deformation mechanisms in incoherent metallic multilayers. Acta Mater 2005; 53: 4817–4824.

24.

Zheng

et al.

Plastic instability mechanisms in bimetallic nanolayered composites. Acta Mater 2014; 79: 282–291.

25.

Leffers

Ray

. The brass type texture and its deviation from copper type texture. Prog Mater Sci 2009; 54: 351–396.

26.

Toth

Neale

Jonas

. Stress response and persistence characteristics of the ideal orientations of shear textures. Acta Metall 1989; 37: 2197–2210.

27.

Gil Sevillano J, Van Houtte P, Aernoudt E. Large strain work hardening and textures. Prog Mater Sci 1981, 25: 69–412.

28.

Kocks

Canova

Jonas

. Yield vectors in fcc crystals. Acta Metall 1983; 31: 1243–1252.

29.

Hughes

Lebensohn

Wenk

et al.

Stacking fault energy and microstructure effects on torsion texture evolution. Proc R Soc Lond Ser A 2000; 456: 921–953.

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