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...

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 effects of melt-pool geometrical parameters on crystal growth and microstructure development during laser surface melting of single-crystal alloys were studied by means of mathematical modeling and experiments. A mathematical model was developed for the three-dimensional (3-D) melt-pool geometry and single-crystalline melt-pool solidification in laser surface melting. The 3-D meltpool geome...

ht://ad D ow nladed fom Quantitative constraints on the ages of melt-forming impact events on the Moon are based primarily on isotope geochronology of returned samples. However, interpreting the results of such studies can often be difficult because the provenance region of any sample returned from the lunar surface may have experienced multiple impact events over the course of billions of year...

Glaciers and icefields are critical components of Earth’s cryosphere to study and monitor for understanding the effects of a changing climate. To provide a regional perspective of glacier melt dynamics for the past several decades, brightness temperatures (Tb) from the passive microwave sensor Special Sensor Microwave Imager (SSM/I) were used to characterize melt regime patterns over large glac...

0022-3115/$ see front matter Published by Elsevier doi:10.1016/j.jnucmat.2011.02.041 ⇑ Corresponding author. Address: Potter Buildin Central Drive, West Lafayette, IN 47907-2063, USA. T E-mail addresses: [email protected], yimeng.shi@ During plasma instabilities in tokamak devices, metallic plasma facing components (PFC) undergo surface vaporization and melting. Macroscopic losses of melt layers...

[1] Deformation experiments were conducted on fine-grained (3–6 mm), fully synthetic Fo90 olivine aggregates in a gas-medium apparatus at 300 MPa confining pressure and temperatures of 1150–1360 C. The strain rates of the solution-gelation-derived and therefore genuinely melt-free, dry samples are about two orders of magnitude lower than the strain rates for nominally melt-free aggregates at th...

Melt pool temperature is of great importance to deposition quality in Laser Metal Deposition processes. To control the melt pool temperature, an empirical process model describing the relationship between the temperature and process parameters (i.e., laser power, powder flow rate, and traverse speed) is established and verified experimentally. A general tracking controller using the Internal Mo...