scholarly journals Comparative Study on the Grain Refinement of Al-Si Alloy Solidified under the Impact of Pulsed Electric Current and Travelling Magnetic Field

Metals ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 170 ◽  
Author(s):  
Yunhu Zhang ◽  
Xiangru Cheng ◽  
Honggang Zhong ◽  
Zhishuai Xu ◽  
Lijuan Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Comparative Study ◽  
Electric Current ◽  
Grain Refinement ◽  
Pulsed Electric Current ◽  
The Impact

Investigating the Grain Refinement Mechanisms of Pulsed Electric Current, Ultrasonic and Melt Stirring Solidification of Pure Aluminium

JOM ◽  
2021 ◽  
Author(s):  
Nagasivamuni Balasubramani ◽  
Yanyi Xu ◽  
Yunhu Zhang ◽  
Qijie Zhai ◽  
Gui Wang ◽  
...  
Keyword(s):  
Electric Current ◽  
Grain Refinement ◽  
Pure Aluminium ◽  
Pulsed Electric Current

Enhanced rollability of Mg 3Al 1Zn alloy by pulsed electric current: a comparative study

2016 ◽  
Vol 100 ◽  
pp. 204-216 ◽  
Author(s):  
Jie Kuang ◽  
Xiaohui Li ◽  
Ruikun Zhang ◽  
Yongda Ye ◽  
Alan A. Luo ◽  
...  
Keyword(s):  
Comparative Study ◽  
Electric Current ◽  
Pulsed Electric Current

Pulsed Electric Current Sintering of Electrical Discharge Machinable Ceramics

2010 ◽  
Vol 62 ◽  
pp. 175-184 ◽  
Author(s):  
Jef Vleugels ◽  
Olivier Malek ◽  
Kim Vanmeensel ◽  
Shui Gen Huang ◽  
Song Lin Ran ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Temperature Distribution ◽  
Electric Current ◽  
Surface Quality ◽  
Electrical Discharge ◽  
Powder Compact ◽  
Electrical Discharge Machining ◽  
Fast Heating ◽  
Pulsed Electric Current ◽  
The Impact

Pulsed electric current sintering allows densifying most ceramics at high heating and cooling rates within very short times at elevated temperature, allowing to minimise grain growth. In order to fully explore the PECS potential, it is beneficial to flow the current through the powder compact by either using conductive powder or a powder compact that becomes conductive during densification. Although in-situ Joule heating of the powder compact allows very fast heating rates, it does not necessarily result in a homogeneous temperature distribution. The influence of the current flow on densification and the impact of electrical conductivity on the temperature distribution during PECS are illustrated. The PECS technology at present is limited to the fabrication of simple geometrical shapes. Electrical Discharge Machining (EDM) on the contrary allows production of complex shapes, providing the ceramic has a minimum electrical conductivity. Although EDM has no mechanical impact, the thermal impact is high and the EDM parameters should be carefully selected in order to optimise surface quality and component strength. During wire-EDM, the fast and rough initial cut has to be followed by a sequence of lower energy finishing cuts to optimise the surface quality. The case studies presented are B4C-TiB2 ceramics and ZrO2-based composites with electrically conductive phase addition.

scholarly journals Fabrication of Textured Ti3SiC2 Ceramics by Slip Casting in a Magnetic Field and Pulsed Electric Current Sintering

2014 ◽  
Vol 51 (3) ◽  
pp. 163-168
Author(s):  
Kimitoshi Sato ◽  
Hiroto Hirano ◽  
Tohru Suzuki ◽  
Takamasa Ishigaki ◽  
Yoshio Sakka
Keyword(s):  
Magnetic Field ◽  
Electric Current ◽  
Slip Casting ◽  
Pulsed Electric Current

MAGNETIC FIELD IMPACT UPON TRIBOTECHNICAL CHARACTERISTICS OF PERMANENT CONNECTIONS IN RELATION TO FRICTION SHOCK ABSORBERS

2020 ◽  
Vol 2020 (10) ◽  
pp. 4-11
Author(s):  
Victor Tikhomirov ◽  
Aleksandr Gorlenko ◽  
Stanislav Volohov ◽  
Mikhail Izmerov
Keyword(s):  
Magnetic Field ◽  
Friction Factor ◽  
Physical Contact ◽  
Active Centers ◽  
Press Fit ◽  
Electro Magnetic Field ◽  
Investigation Methods ◽  
Electro Magnetic ◽  
The Impact ◽  
The Magnetic Field

The work purpose is the investigation of magnetic field impact upon properties of friction steel surfaces at fit stripping with tightness through manifested effects and their wear visually observed. On the spots of a real contact the magnetic field increases active centers, their amount and saturation with the time of dislocation outlet, and has an influence upon tribo-mating. The external electro-magnetic field promotes the increase of the number of active centers at the expense of dislocations outlet on the contact surface, and the increase of a physical contact area results in friction tie strengthening and growth of a friction factor. By the example of friction pairs of a spentonly unit in the suspension of coach cars there is given a substantiation of actuality and possibility for the creation of technical devices with the controlled factor of friction and the stability of effects achieved is also confirmed experimentally. Investigation methods: the fulfillment of laboratory physical experiments on the laboratory plant developed and patented on bush-rod samples inserted with the fit and tightness. The results of investigations and novelty: the impact of the magnetic field upon the value of a stripping force of a press fit with the guaranteed tightness is defined. Conclusion: there is a possibility to control a friction factor through the magnetic field impact upon a friction contact.

A comparative study of the impact of the cooking process on oxygen delignification

2003 ◽  
Vol 18 (4) ◽  
pp. 388-394 ◽  
Author(s):  
Stefan Antonsson ◽  
Mikael E. Lindstrom ◽  
Martin Ragnar
Keyword(s):  
Comparative Study ◽  
Oxygen Delignification ◽  
Cooking Process ◽  
The Impact
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