Forming limit of electrodeposited nickel coating in the left region |
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Authors: | L Q Zhou Y P Li Y C Zhou |
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Affiliation: | (1) Mechanical Engineering School of Xiangtan University, 411105 Hunan, China;(2) Key Laboratory of Advanced Materials and Rheological Properties of Ministry of Education, Xiangtan University, 411105 Hunan, China |
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Abstract: | A uniform nickel (Ni) coating was bilaterally electrodeposited on the low-carbon steel substrate for the application of advanced
battery shells. Its forming limit was investigated by Hill localized necking theory coupled with finite element simulation
and scanning electron microscopy. The effective stress and effective strain in the Ni coating and steel substrate are deduced
using Hill’s anisotropic yield function. The localized necking condition is derived by sandwich sheet analysis, and the forming
limit strains are obtained by solving the nonlinear equation of the localized necking condition. Extensive calculations are
carried out using the proposed model. This study exhibits the nickel coating thickness and the normal anisotropic coefficients
of the coating and substrate have little influence on the forming limit curve (FLC) in the left region of the coated sheet,
but the strain hardening exponents of the coating and substrate have much effect on it. The calculated result matches well
with the measured data in uniaxial tension. This investigation is useful for the preparation of the electrodeposited Ni coating
and helpful for the forming operation of the battery shells. |
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Keywords: | electrodeposited nickel (Ni) coating forming limit necking |
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