This paper studied the cutting properties of Ti-6Al-4V under cryogenic cooling to find a solution of improvement in tool load-carrying, thermal stress, tool life and finish quality. Firstly, this paper established a 3-D cutting model of Ti-6Al-4V under cryogenic cooling with liquid nitrogen, and then set the parameters of material, friction model and cutting conditions. Based on this model, the...

This Study about output parameter of Non Traditional machining, i.e., Which are not used conventionally like Electrical Discharge Machining (EDM) is a machining method primarily used for hard metals or those that would be very difficult to machine with traditional techniques, here it is used for cryogenically treated work piece. In simple terms, EDM is a manufacturing process whereby a desired ...

High-speed steel (HSS) tools are the most commonly used tools in small and medium-scale industry. Cryogenic treatment can be used to enhance the tool life. Studies on cryogenically treated (CT) cutting tools show micro structural changes in the material that can influence the life of the tools significantly. This paper primarily reports performance of CT HSS tools as compared to untreated (UT) ...

The cryogenic cavitation has critical implications on the performance and safety of liquid rocket engines. In this study, a systematic investigation based on the surrogate modeling techniques is conducted to assess and improve the performance of a transport-based cryogenic cavitation model. Based on the surrogate model, global sensitivity analysis is be conducted to assess the role of model par...

Accurate values of the thermal conductivity and specific heat of deuterium are necessary to make high quality cryogenic laser fusion targets. Due to the difficulty of measuring these values at cryogenic temperatures, the “3ω” method is used. This involves passing an oscillating current through a platinum wire embedded in deuterium and measuring the third-harmonic voltage that results from the t...

LLE Review, Volume 105 26 Introduction In inertial fusion experiments, it is energetically advantageous to form the fuel into a solid shell before compression.1 Current cryogenic target experiments on OMEGA are being performed with pure deuterium (D2) as the fuel. 2 Future cryogenic target experiments will be performed with an equimolar solid mixture of deuterium and tritium (D-T). An equilibri...

H. Kollmus1, M. Wengenroth1, Th. Hackler1, M. Bender1, D. Severin1, A. Krämer1, E. Mahner2, and H. Reich-Sprenger1 1GSI, Darmstadt, Germany; 2CERN, Geneva, Switzerland Ion induced desorption is a serious intensity limitation for high current, low charge state heavy ion accelerators like SIS18 and SIS100. Whereas room temperature desorption was intensively investigated in the last years [1, 2], ...

We discuss results of low noise amplifier Monolithic Millimeter-wave Integrated Circuits (MMICs), which were designed for specific frequencies in the range of 70-200 GHz. We report on room temperature and cryogenic noise performance for a variety of circuits. The designs utilize Northrop Grumman Corporation’s (NGC) 35 nm gate length InP HEMT technology. Some of the lowest reported noise figures...

UK Biobank required a cryogenic facility to store, in vapour phase, a minimum of 5 000 000 1.2 ml capacity micro-tubes held in racks of 96 tubes below -180 degrees C for a 20 year period. The archive would be housed in a 900 m(2) industrial unit remote from the main laboratory area that would be generally unmanned and would require a complete cryogenic infrastructure. A commercial supplier was ...

We present a continuous liquid level sensing system for both room temperature and cryogenic fluids with millimeter spatial resolution. Change of in-fiber Rayleigh backscattering signal from the distinct thermal response of the heated sensing fiber in liquid and in air were interrogated and spatially resolved using the optical frequency domain reflectometry. Both electrical and optical heating t...