A macro/micro model for magnetic stirring and microstructure formation during solidification

Fluid Flow and Solidification Under Combined Action of Magnetic Fields and Microgravity

“…While the enthusiasm of going to space has been cherished by some flight experiments in which high quality crystals are obtained, it has-been largely quenched by others in which poor quality crystals are produced. This inconsistency in space grown crystal qualities is found to be attributed to the existence of perturbed gravity forces in space, or g-jitter as often referred to in literature, which are random in nature and varies both spatially and temporally [2].…”

EMS-CO2Welding: A New Approach to Improve Droplet Transfer Characteristics and Welding Formation

“…Many research works and engineering practical experience indicate that the EMS welding technique can control arc shape and arc behavior action [15,16] and affect the molten metal flowing in welding pool [11], nucleation and crystalline growth [14,17], and the welding solidification process [18]. With the use of EMS welding technique, the primary grain of the welding joint is refined [10,17,18], and the segregation and nonhomogeneity of the welding seam are reduced or eliminated [13,14,17]. Because EMS welding improves plasticity and toughness of the welding joint and reduces the sensibility of crystal crack and gas cavity [19], it has been called NO-DEFECTS welding technique by some researchers [9,10,14,17,18].…”

“…With the use of EMS welding technique, the primary grain of the welding joint is refined [10,17,18], and the segregation and nonhomogeneity of the welding seam are reduced or eliminated [13,14,17]. Because EMS welding improves plasticity and toughness of the welding joint and reduces the sensibility of crystal crack and gas cavity [19], it has been called NO-DEFECTS welding technique by some researchers [9,10,14,17,18].…”

IDENTIFICATION OF THE TRANSITION RULE IN A MODIFIED CELLULAR AUTOMATA MODEL: THE CASE OF DENDRITIC NH4Br CRYSTAL GROWTH

“…The key motivation for studying different morphological complexities of crystal growth is the profound influence of these complexities on the physical properties of polycrystalline materials. For example, solidification of many materials generates macro or even nano-scale dendritic structures that can thoroughly affect physical properties of the final material [Govindaraju, 2002]. However, due to the underlying difficulty of understanding the complexity of molecular dynamics and the huge disparity between molecular and macroscale events we cannot predict the growth morphology behaviour of even relatively simple crystals.…”