Influence of process parameters on deep drawing of AA6111 aluminum alloy at elevated temperatures

Effect of hydrophilic silica nanoparticles on hydrate formation: Insight from the experimental study

“…The X-ray computed microtomography and tomography observation of hydrate formation using larger hydrophilic particles ( ∼μm and mm) such as glass beads and sands revealed that water preferred to adsorb on the surface of hydrophilic minerals compared with the surface of hydrophilic hy-drates, and the water layer adsorbed on the grain surface was found not to convert into hydrate [42][43][44] . The adsorption effects of hydrophilic nanoparticles should be stronger than those of micro or millimeter particles because the specific surface area and surface activity of nanoparticles are relatively large [14][15][16] . Therefore, the water molecules around the hydrophilic nanoparticles are bound, and the whole water activity in the fluid is decreased (the more the amount of hydrophilic nanoparticles, the lower the activity of water molecules, see Fig.…”

“…Nanoparticles are small with high specific surface area and high surface activity. Therefore, they can not only physically fill the micro-channels in the formation but also combine with high molecular weight polymers via bridging and curling effects to plug larger pore throats and fissures rapidly, which enhances the quality of the mud cakes that are formed by drilling fluid [14][15][16] . In recent years, nanomaterials have been extensively applied in conventional oil and gas well drillings [17] .…”

Influence of process parameters on punch force evolution in deep drawing process

“…The stress-strain relationship is given in Fig. 1 [12].The stress increases with the increase of strain rate and the decrease of the forming temperature. Table 2 Orthogonal array (L9) of Taguchi method Experiment Parameter V BHF T 1 1 1 1 1 2 1 2 2 2 3 1 3 3 3 4 2 1 2 3 5 2 2 3 1 6 2 3 1 2 7 3 1 3 2 8 3 2 1 3 9 3 3 2 1 Fig.…”

“…So those process parameters are under consideration in this study. [12] These parameters have three levels, e.g. high, middle and low.…”

“…Table 2 Orthogonal array (L9) of Taguchi method Experiment Parameter V BHF T 1 1 1 1 1 2 1 2 2 2 3 1 3 3 3 4 2 1 2 3 5 2 2 3 1 6 2 3 1 2 7 3 1 3 2 8 3 2 1 3 9 3 3 2 1 Fig. 1 True stress-true strain curves for different temperatures at different strain rates of (a) 0.1 s -1 and (b) 1 s -1 [12].…”