Analysis of microbending of CuZn37 brass foils based on strain gradient hardening models

Li HZ, Dong XH, Shen Y, Zhou R, Diehl A, Hagenah H, Engel U, Merklein M, Cao J (2012)

Publication Type: Journal article

Publication year: 2012

Journal

Journal of Materials Processing Technology Elsevier

Publisher: None

Book Volume: 212

Pages Range: 653-661

Journal Issue: 3

DOI: 10.1016/j.jmatprotec.2011.10.007

Abstract

Microbending experiments of brass foils were conducted and demonstrated clear size effects, i.e., the normalized bending moment increased with the reduction of foil thickness. The experiments were modeled using the classical plasticity model and three strain-gradient plasticity models. A modified Nix-Gao model was proposed to consider the number of twins across the thickness direction in strain hardening. It was found that the proposed model could better predict the normalized bending moment for both fine-grain and coarse-grain foils and the proposed equation for material intrinsic length could better capture the physics of material deformation. Furthermore, micro-hardness distributions in the bending area were measured and obvious lower-hardness region was found in the middle layer of fine-grain foils instead of coarse-grain foils. This indicates that the modified Nix-Gao model and the assumption of fully plastic bending worked better for coarse-grain foils than for fine-grain foils. © 2011 Elsevier B.V. All rights reserved.

Authors with CRIS profile

Hinnerk Hagenah Institute of Manufacturing Technology Ulf Engel Institute of Manufacturing Technology Marion Merklein Institute of Manufacturing Technology

Additional Organisation(s)

Institute of Manufacturing Technology

Involved external institutions

Hebei University of Engineering CN China (CN) Shanghai Jiao Tong University / 上海交通大学 CN China (CN) Northwestern University US United States (USA) (US)

How to cite

APA:

Li, H.-Z., Dong, X.-H., Shen, Y., Zhou, R., Diehl, A., Hagenah, H.,... Cao, J. (2012). Analysis of microbending of CuZn37 brass foils based on strain gradient hardening models. Journal of Materials Processing Technology, 212(3), 653-661. https://dx.doi.org/10.1016/j.jmatprotec.2011.10.007

MLA:

Li, He-Zong, et al. "Analysis of microbending of CuZn37 brass foils based on strain gradient hardening models." Journal of Materials Processing Technology 212.3 (2012): 653-661.

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