Radioactive disequilibrium of 23Su nuclides is commonly observed in young lavas and has often been used to infer the rates of melting and melt migration. However, previous calculations do not actually include melt transport. Here we explore the behaviour of short-lived radionuclides in a new calculation that includes the fluid dynamics of melt segregation. We emphasize that series disequilibriu...

Microwave measurements have been used in various studies to detect melt based on their sensitivity to liquid water present in snow. To contrast different melt detection methods used with different sensors, six different melt detection method/sensor combinations are compared using data for the summer of 2000. The sensors include the Special Spectral Microwave Imager (SSM/I), SeaWinds on QuikSCAT...

Introduction: Impact melt is a typical product produced during the cratering process as a result of the intense heating of the target usually because of pressure decompression, but also possible because of shear heating (Figure 1). Melt is observed on all of the terrestrial planets in both simple and complex craters [16]. High-resolution data for the Moon now allows impact melt deposits to be c...

[1] We derived the extent, onset date, end date, and duration of snowmelt in Antarctica from 1978 to 2004 using satellite passive microwave scanning multichannel microwave radiometer (SMMR) and Special Sensor Microwave Imager (SSM/I) data. A wavelettransform-based method was developed to determine and characterize melt occurrences. About 9–12% of the Antarctic surface experiences melt annually....

Processes that use moving point heat sources to temporarily create localized melt pools (metal additive manufacture and fusion welding) have a flow phenomenon due the surface tension gradient. Surface of liquid metal reduces with temperature this, coupled high gradients associated sources, creates Marangoni convection in melt. The tends reduce change pool geometry (increases width but depth). C...

Abstract The oxide evolution during the solidification of 316L stainless steel from additive manufacturing powders with different oxygen contents is studied by in situ observation melting and powder materials, advanced characterization solidified non-equilibrium thermodynamic analysis. An map established for contents. It reveals relationship between surface oxidation reused its expected species...

We have investigated microstructural characteristics and solute Si element in the α-Al (fcc) matrix of Al-12%Si binary alloy additive-manufactured by laser powder bed fusion (L-PBF) process terms different locations melt-pool structure (inside or around boundaries). Their variations post heat-treatments at various temperatures were examined. The fraction phase lattice parameter quantified XRD m...

The purpose of this research is to develop a hybrid experimental and computational model estimate the absorption laser for Laser-Based Powder Bed Fusion (LB-PBF) IN718. also aims find an underlying knowledge on effect ratio meltpool morphology. This helps improve accuracy prediction morphology rheology melt tracks as well temperature-related phenomena in process. In paper, two test sets initial...

An advanced SiO2–lignin hybrid material was obtained and tested as a novel poly(vinyl chloride) (PVC) filler. The processing of compounds of poly(vinyl chloride) in the form of a dry blend with silica–lignin hybrid material and, separately, with the two components from which that material was prepared, was performed in a Brabender mixing chamber. An analysis was made of processing (mass melt fl...