Influence of Surface Effect On Nickel Micro Deep Drawing Process

Keller, Clément; Afteni, Mitica; Banu, Mihaela; Habraken, Anne; Hug, Éric; Castagne, Sylvie; Duchêne, Laurent; Barlat, Frédéric; Moon, Young-Hoon; Lee, M. G.

doi:10.1063/1.3457495

Cited by 2 publications

(1 citation statement)

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“…Nanoindentation measurements proved that stress gradients, between core and surface regions, form along a distance corresponding to 30% of the average grain size. Using this result, the fraction f s of area affected by surface effect can be easily computed and the mixture law has been successfully employed to reproduce the mechanical behaviour of Ni samples with various thicknesses [13].…”

Section: Thermec 2013mentioning

confidence: 99%

Impact of Metallurgical Size Effects on Plasticity of Thin Metallic Materials

Hug

Keller

Habraken

2014

MSF

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Three examples involving size effects are presented with implications concerning the formability: small Ni-20wt.%Cr resistive bridges, magnetic micro-sensors performed with (Ni, Co, Fe) based alloys and copper clad aluminum thin wires. The mechanical properties are directly linked to the ratio thickness over grain size (t/d ratio) of the parts. These metallurgical considerations must be taken into account when we are concerned by the numerical simulation of the process of such components. It is shown that the simulations can correctly reproduce the softening effect linked to a decrease in thickness and in number of grains across the thickness: the quality of the final shape strongly depends on the number of grains across the thickness. Finally the effect of a moderate increase in temperature on these results will be briefly reported.

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Section: Thermec 2013mentioning

confidence: 99%