Results 11 to 20 of about 78,610 (291)

Experimental investigation on the effect of dry and multi-jet cryogenic cooling on the machinability and hole accuracy of CFRP composites

Journal of Materials Research and Technology, 2022
In this work, the drilling performance of carbon fibre reinforced plastic (CFRP) composites is analysed in terms of thrust force (Fn), torque (Mz), specific cutting energy (SCE), delamination factor (Fd), and hole quality under dry and cryogenic cooling ...
Chetan Agrawal, Navneet Khanna, Danil Yu Pimenov, Szymon Wojciechowski, Khaled Giasin, Murat Sarıkaya, Çağrı Vakkas Yıldırım, Muhammad Jamil   +7 more
doaj   +1 more source

100-mJ, 100-W cryogenically cooled Yb:YLF laser

Optics Letters, 2023
We present a diode-pumped Yb:YLF laser system generating 100-mJ sub-ps pulses at a 1-kHz repetition rate (100 W average power) by chirped-pulse amplification. The laser consists of a cryogenically cooled 78 K, regenerative, eight-pass booster amplifier seeded by an all-fiber front end.
Mikhail Pergament, Martin Kellert, Umit Demirbas, Jelto Thesinga, Simon Reuter, Yizhou Liu, Yi Hua, Muharrem Kilinc, Alexey Yakovlev, Franz X. Kärtner   +9 more
openaire   +3 more sources

Experimental Study on Rock Heat Transfer under Cryogenic Impact of Liquid Nitrogen

Taiyuan Ligong Daxue xuebao, 2022
The thermal fracture of rock under cryogenic impact is caused by the instantaneous huge thermal stress caused by rapid temperature change. The law of heat transfer inside rock determines the magnitude and action form of thermal stress.
Yu CAO, Baoping XI, Lumin ZHAO, Liangliang CHANG, Siyuan SHANG, Weichen WU   +5 more
doaj   +1 more source

Evaporative Cooling of Antiprotons to Cryogenic Temperatures [PDF]

Physical Review Letters, 2010
We report the application of evaporative cooling to clouds of trapped antiprotons, resulting in plasmas with measured temperature as low as 9~K. We have modeled the evaporation process for charged particles using appropriate rate equations. Good agreement between experiment and theory is observed, permitting prediction of cooling efficiency in future ...
ALPHA Collaboration, Andresen, G. B., Ashkezari, M. D., Baquero-Ruiz, M., Bertsche, W., Bowe, P. D., Butler, E., Cesar, C. L., Chapman, S., Charlton, M., Fajans, J., Friesen, T., Fujiwara, M. C., Gill, D. R., Hangst, J. S., Hardy, W. N., Hayano, R. S., Hayden, M. E., Humphries, A., Hydomako, R., Jonsell, S., Kurchaninov, L., Lambo, R., Madsen, N., Menary, S., Nolan, P., Olchanski, K., Olin, A., Povilus, A., Pusa, P., Robicheaux, F., Sarid, E., Silveira, D. M., So, C., Storey, J. W., Thompson, R. I., van der Werf, D. P., Wilding, D., Wurtele, J. S., Yamazaki, Y.   +39 more
openaire   +6 more sources

Investigation on microstructure and mechanical properties of hot-rolled AZ31 Mg alloy with various cryogenic treatments

Journal of Materials Research and Technology, 2022
AZ31 Mg alloy sheet, prepared by a novel process combining hot rolling and various cryogenic treatments, has been investigated on its microstructure and mechanical properties. The results show that twins and the Al8Mn5 phase were introduced in the sample
Bo Che, Liwei Lu, Jialong Zhang, Jie Teng, Liang Chen, Yong Xu, Tao Wang, Liang Huang, Zhiqiang Wu   +8 more
doaj   +1 more source

Development of Universal Exergy Analysis to the Selection of Cryogenic Cooling System

MATEC Web of Conferences, 2017
Efficiency is one of the most important parameters that apply to the cooling system. This paper describes a development of universal methodology to evaluate the effectiveness of cryogenic cooling systems.
Zaika S. V., Uglanov D. A., Dostovalova S. S.   +2 more
doaj   +1 more source

Finite element method (FEM) simulation of processing of AISI-316 austenitic stainless steel by high-pressure torsion (HPT) process at the cryogenic cooling

Metalurgija, 2022
In this work the high-pressure torsion process of AISI-316 stainless steel in cryogenic conditions is studied by means of finite element simulation.
A. Volokitin, I. Volokitina, E. Panin, A. Naizabekov, S. Aksenov, D. Kuis   +5 more
doaj  

Experimental research on rock fracture failure characteristics under liquid nitrogen cooling conditions

Results in Physics, 2018
As liquid nitrogen is injected into a wellbore as fracturing fluid, it can rapidly absorb heat from warmer rock and generate cryogenic condition in downhole region.
Feng Gao, Chengzheng Cai, Yugui Yang
doaj   +1 more source

Evaluation of tool wear, surface roughness/topography and chip morphology when machining of Ni-based alloy 625 under MQL, cryogenic cooling and CryoMQL

Journal of Materials Research and Technology, 2020
Although nickel-based aerospace superalloys such as alloy 625 have superior properties including high-tensile and fatigue strength, corrosion resistance and good weldability, etc., its machinability is a difficult task which can be solved with ...
Çağrı Vakkas Yıldırım, Turgay Kıvak, Murat Sarıkaya, Şenol Şirin   +3 more
doaj   +1 more source

Progressive Tool Wear in Cryogenic Machining: The Effect of Liquid Nitrogen and Carbon Dioxide

Journal of Manufacturing and Materials Processing, 2018
This experimental study focuses on various cooling strategies and lubrication-assisted cooling strategies to improve machining performance in the turning process of AISI 4140 steel.
Yusuf Kaynak, Armin Gharibi
doaj   +1 more source