Viscous Shear Banding in Cutting of Metals

Sagapuram, Dinakar; Viswanathan, Koushik

doi:10.1115/1.4040875

Title: Viscous Shear Banding in Cutting of Metals

Journal Article · Tue Jul 31 00:00:00 EDT 2018 · Journal of Manufacturing Science and Engineering

DOI:https://doi.org/10.1115/1.4040875· OSTI ID:1613469

Sagapuram, Dinakar ^[1]; Viswanathan, Koushik ^[2]

Department of Industrial and Systems Engineering, Texas A&M University, College Station, TX 77843 e-mail:
Department of Mechanical Engineering, Indian Institute of Science, Bangalore 560012, India e-mail:

Shear banding is a type of plastic flow instability with often adverse implications for cutting and deformation processing of metals. Here, we study the mechanics of plastic flow evolution within single shear bands in Ti- and Ni-based alloy systems. The local shear band displacement profiles are quantitatively mapped at high resolution using a special micromarker technique. The results show that shear bands, once nucleated, evolve by a universal viscous sliding mechanism that is independent of microstructural details. The evolution of local deformation around the band is accurately captured by a momentum diffusion equation based on a Bingham-type flow rule. The predicted band viscosity is very small, compared to those of liquid metals. A plausible explanation for this small viscosity and fluid-like behavior at the band, based on phonon drag, is presented.

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Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

DOE Contract Number:: EE0007868

OSTI ID:: 1613469

Journal Information:: Journal of Manufacturing Science and Engineering, Vol. 140, Issue 11; ISSN 1087-1357

Publisher:: ASME

Country of Publication:: United States

Language:: English

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