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Defect and diffusion forum 203-205 (2002) 61-80

Long-Term Life of Ni/Cu Bellows: Effect of Diffusion on Thermomechanical Properties

Olivier Arnould 1, François Hild 1

(2002)

The aim of this paper is to discuss different couplings between diffusion, re- crystallisation/grain growth, strain/stress, heat transfer and thermo-mechanical behaviour of metallic materials. The understanding of these different physical phenomena is needed to predict the long-term life of mechanical parts in components. Some results are presented and further studies are suggested to improve the evaluation of the (inter)diffusion and re- crystallisation parameters in fine-grained electroplated Ni/Cu materials. To illustrate the coupling between elasticity and diffusion, classical results in homogenisation consistent with the main diffusion regime are used to predict the change in elastic moduli with time.

1:	Laboratoire de Mécanique et Technologie (LMT)
	CNRS : UMR8535 – Université Paris VI - Pierre et Marie Curie – École normale supérieure de Cachan - ENS Cachan

Subject

:

Physics/Mechanics/Mechanics of materials Engineering Sciences/Mechanics/Mechanics of materials

Keyword(s): ageing – diffusion – grain growth – mechanical behaviour – mechanical loading – couplings – homogenisation

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From: François Hild <>

Submitted on: Tuesday, 21 September 2004 17:11:41

Updated on: Tuesday, 16 September 2008 22:27:24