CONTRAT DE LOCATION Salle de la Sacoche Sierre

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REGLEMENT D’UTILISATIONArticle 1Préjudice de fortuneLa Fondation de la Maison des Jeunes n’assume aucune responsabilité si, pour quelque raison que ce soit, l’étatde l’infrastructure ne permet pas à la manifestation projetée d’avoir lieu, entraînant un préjudice de fortune parl’organisateur (billets vendus, etc.).Article 2Etat des lieuxUn état des lieux se fera lors de la remise des clefs, signé par les parties.Article 3Remise des clefsDès 2005, une personne responsable de la salle remettra les clefs, effectuera avec le locataire le contrôle deslocaux, ce même contrôle sera exécuté lors de la restitution des locaux ; pour cette prestation, il sera perçu unmontant de Fr. 50.-, montant qui sera prélevé sur le dépôt de garantie.Article 4MatérielLes locaux sont remis au locataire, propres, les chaises étant empilées à l’endroit assigné. La salle dispose de260 chaises.Article 5LocationLe prix de location convenu est de Fr. ( cents) et un dépôt de garantie de Fr. ( cents) est demandé ; lemontant total de Fr. est payable à la signature du contrat auprès de l’UBS SA Sierre, compte 268-H5300361.0.Article 6ChargesDans le prix de location sont incluses les charges d’électricité et de chauffage.Article 7Entretien et nettoyageLes locaux seront restitués, propres, les chaises étant empilées à l’endroit assigné ; l’état des lieux sera contrôléet contresigné.Si le nettoyage n’était pas fait, ce travail sera effectué par du personnel de nettoyage, facturé au prix de Fr. 25.-par heure.Article 8Dépôt de garantieLe montant du dépôt de garantie sera restitué au locataire, sous déduction des éventuels frais de nettoyage oude réparation des dégâts causés.Visa du locataire …………………………2
J. Fornell et al. / Scripta Materialia 62 (2010) 13–16 15Figure 2. Dependence of hardness on the nanoindentation maximumload for (a) several pieces of the as-cast sample and (b) several pieces ofthe compressed specimen. The inset in (a) is a scanning electronmicroscopy image of an indentation performed on the as-cast specimenusing a maximum load of 500 mN.matrix. The second ring in the SAED pattern, markedwith an arrow (inset Fig. 1b), indicates the formationof a crystalline phase that may be the tetragonal Zr 2 Ni(space group I4/mcm, a = 0.649 nm and c = 0.527 nm).Therefore, our results indicate that deformation promotesnanocrystallization. It should be noted that Denget al. [27] also presented a direct high-resolution TEMobservation of nanocrystallization in a Zr–Al–Ni–CuBMG fractured by compression test. They suggestedthat, due to the concentration of plastic flow, the localatomic neighbor distance increases producing nanocrystallizationin the amorphous structure. Other authorshave obtained evidence for nanocrystallization in shearbands [28,29]. The temperature increase associated withdeformation is claimed to play a role in the formation ofnanocrystals.In order to better understand the deformation behaviorin this metallic glass, nanoindentation tests were performedat different maximum loads (P max ), both in theas-cast and the compressed specimen. Generally, in bulkmetallic glasses, hardness is expected to decrease whenthe indentation depth increases. This effect is usuallyreferred to as the indentation size effect [30–35] and isattributed to the softening caused by deformation-inducedcreation of free volume. In the present study (Fig. 2), hardnessof the as-cast alloy is found to decrease for P max largerthan 100 mN. However, it is interesting to remark that anincrease of hardness is observed when indentations wereperformed at lower loads (see Fig. 2a).To elucidate the physical origin of this mechanicalhardening, TEM specimens from the as-cast alloy, containingan array of nanoindents, were prepared. Figure3a is an SEM image showing a hole (created during ionmilling of the TEM sample preparation) surrounded byFigure 3. Microstructural features in the samples indented at amaximum force of 100 mN (a–d) and at 10 mN (e and f). (a) SEMimage displaying an array of indentations (indicated by circles)separated by 20 lm from each other and prepared for subsequentTEM observation. The inset is a TEM bright-field image of anindentation which was perforated during ion milling. (b) An enlargementcorresponding to the square drawn in the inset in (a), indicatingthe presence of nanosized crystals embedded in an amorphous matrix.The corresponding SAED pattern confirms the presence of thecrystalline phase. (c) TEM image performed in a region located at1 lm from the edge of the hole indicated in panel (a) and enlarged inpanel (b); (d) corresponds to a region located at 10 lm from the sameindent. (e) An enlargement of a 10 mN indentation (displayed in thebottom right corner) revealing the presence of a high amount ofnanocrystals inside the indent. (f) TEM dark-field image obtained onthe diffraction ring marked on the inset SAED pattern confirming theexistence of nanocrystallites in the amorphous matrix.an array of P max = 100 mN indentations separated by20 lm from each other. The inset of Figure 3a is a smallhole corresponding to one of the indents. Figure 3b, whichis an enlargement of the square indicated in the inset ofFigure 3a, reveals the existence of nanocrystals with anaverage size below 7 nm near the indent. The correspondingSAED pattern confirms the presence of a crystallinephase. The amount of nanocrystals decreases as the distancefrom the indent is increased (see Fig. 3c) and nonanocrystals could be observed by TEM at 10 lm fromthe indent (Fig. 3d). This confirms that nanocrystallizationis indeed induced during nanoindentation.The same preparation procedure was used to observenanoindents performed at a maximum load of 10 mN.In this case, the observed nanoindent (inset Fig. 3e), whichwas not perforated during the thinning process, againcontained several nanocrystals. Nanocrystallization isalso evidenced in Figure 3f, which is a dark-field TEM imagefrom the diffraction spot highlighted in the inset, correspondingto an interplanar distance of d = 0.204 ±

CONTRAT DE LOCATION Salle de la Sacoche Sierre

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