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C. Principe-du-mode, 1 ? Le fil s'approche, l'arc s'établit et crée une goutte à l'extrémité du fil ; 2 ? Le fil vient porter la goutte dans le bain de fusion, un court-circuit apparait : le poste fait chuter le courant à une valeur quasi nulle ; 3 ? Le fil se rétracte et se détache de la goutte, le courant est toujours faible ; 4 ? Le mouvement du fil s'inverse et le cycle redémarre, p.27

. Macrographies-en-lumière-polarisée-de-rechargements and ). Au-réactif-de-barker, (a) MIG, (b)MIG pulsé, p.50

.. Tôles-martyres-installées-sur-l-'outillage, 133 6.10 Placement (a) et système de fixation (b) de l'outillage11 (a) Coupe macrographique d'un essai de rechargement sur une portion de carter réalisé avec une énergie de rechargement de 1150 J/cm. (b) Zone de faible dilution. (c) Micrographie de la zone de faible dilution, p.135

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