During the laser powder bed fusion (LPBF) process, keyhole pores or lack of may form depending on energy density used to fabricate part. In this study, different levels densities are investigate formed within 2.5 mm × 1 cuboid specimen. Micro-CT is characterize and measure pores, results show that porosity increases with an increase in density, while a decrease density. Besides, metallography p...

Magmas erupted at mid-ocean ridges (MORB) result from decompression melting of upwelling mantle. However, the mechanism of melt transport from the source region to the surface is poorly understood. It is debated whether melt is transported through melt-filled conduits or cracks on short time scales ( 10 yrs), or whether there is a significant component of slow, equilibrium porous flow on much l...

Orthopyroxene (Opx) was present during a significant portion of crystallisation of the lunar magma ocean, but its influence on co-existing melt trace element contents is not well quantified. We performed high-pressure (P, 1.1 to 3.2 GPa), high-temperature (T, 1400 to 1600 °C) experiments on synthetic Fe-rich compositions at reducing conditions relevant to the lunar mantle to constrain trace ele...

• Design of an electrochemical sensor adequate to RAMI conditions IFMIF-DONES. Determination hydrogen in liquid lithium. Online muliplex monitoring. Modular design for different extended approaches (impurities, procedures, sizes). The radiation-induced degradation materials fusion systems is planned be investigated IFMIF-DONES ( International Fusion Materials Irradiation Facility - DEMO Oriente...

Despite considerable advances in of laser direct metal deposition (LDMD) process optimization, there is rather limited work reported on the effects of melt pool variables on the final deposit characteristics. This article considers the effects of process parameters and melt pool characteristics on the deposition of Inconel 718 powder on a Ti-6Al-4V thin wall. A 1.5kW diode laser and LDMD system...

Abstract This letter presents the design and experimental validation of a real-time image-based feedback control system for metal laser powder bed fusion (LPBF). A coaxial melt pool video stream is used to power in at 2 kHz. Modeling image response changes input presented. Based on this identified model, controller implemented experimentally single track part scales. On single-track scale, succ...

we chose Sn10Bi, Sn10Bi10In, Sn20Bi, and Sn20Bi20In (numbers are in weight percent) rapidly solidified from melt using melt-spinning technique for intermediate –step soldering. We then investigated the structure, electrical and mechanical properties of the melt-spun ribbons using x-ray diffraction, double bridge circuit, dynamic resonance technique, and Vickers microhardeness tester. It was con...

Moseley and Saros’s MELT in case of inconvertible paper money In developing Marx’s non-commodity theory of money which is largely an uncultivated area in Marxian economics, one of the crucial issues at stake is to establish the monetary expression of labour time (MELT) in case of inconvertible paper money consistently with Marx’s theory in general and not rejecting his labour theory of value in...

Melt dispersion experiments with lateral failure in the bottom head were carried out in a 1:18 scaled annular cavity design under low pressure conditions. Water and a bismut-alloy were used as melt simulant material and nitrogen as driving gas. With lateral breaches the liquid height in the lower head relative to the upper and lower edge of the breach is an additional parameter for the dispersi...

The behaviour of Group I and II elements during the petrogenesis felsic igneous rocks is largely controlled by feldspar-liquid relationships. Numerous experimental studies have addressed plagioclase/melt element partitioning, with fewer devoted to potassium feldspar, very few albite-rich ternary-composition feldspar (An ∼ Or < Ab). However, partition coefficient for Ba known increase at ...