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MATHEMATICAL SIMULATION OF HEAT AND MASS TRANSFER IN PULSED ARC WELDING BY MELTING ELECTRODE

O.I.Shpigunova , S. V. Shpigunov , Yu.N. Saraev (Institute of Strength Physics and Materials Science , Siberian Branch , Russian Academy of Sciences , Tom- sk , Russia)

金属学报(英文版)

In this paper the processes of melting and transfer of an electrode metal to the molten pool, hydrody- namics of molten pool in controlled pulsed arc welding in carbon dioxide have been investigated.The process of pulsed arc welding with systematic short - circuits of the arc gap is realized by adaptive algo- rithms of pulsed control over main energetic parameters of welding - arc current and voltage,arc heated efficiency,peak,short - circuiting current, which provide the dosage of energy for energy for melting and transfer of every for of an electrode metal, the control over fluidity of the weld pool. Physica and mathematical models describing such processes in CO2, origind software hare been developed.The re- sults of physical simulation and mathemaical modelling permit to determine the influence of energetic parameters of the process on the condition of the "power source-electrode-arc-molten pool" electrodynamic system at each moment of time.

关键词: pulse , null , null , null

Dissipation of Solitary Waves in Aluminum with Grain Boundary

S.G.Psakhie , K.P.Zolnikov and D.Yu. Saraev (Institute of Strength Physics and Materials Science , Russian Academy of Sciences , Siberian Branch , Akademicheskii pr.2/1 , 634021 Tomsk Russia)

材料科学技术（英）

The behaviour of passing solitary waves through the region of grain boundary has been investigated on the basis of the molecular dynamics method. It has been shown that solitary waves initiated by compression and shear loading have a different interaction with the grain boundary region. The possibilities of using solitary waves for nondestructive testing of materials, in particular, for testing the quality of coatings, for testing of accumulation of microdamages, etc. have been noted.

关键词:

COMPUTER-AIDED DESIGN OF ADAPTIVE PULSED ARC WELDING OF ROOT WELDS BY MELTING ELECTRODE

Yu. N. Sarave , O. I.Shpigunova(Institute of Shength Physics and Materials Science , Siberian Branch , Russian Academy Of Sciences , Tom-sk , Russia)

金属学报(英文版)

The purpose of computer-aided design of new adaptive pulsed arc technologies of welding is: to de- sign optimum algorithms of pulsed control over main energy parameters of welding.It permits:to in- crease welding productivity, to stabilize the welding regime, to control weld formation,taking into ac- count its spatial position, to proveal specie strength of the welded and coatings. Computer- aided design reduces the time of development of new pulsed arc technology:provides the optimization of technological referes according to the operating conditions of welded joints,the prediction of the ser- vice life of the welds.The developed methodology of computer-aided design of advanced technologies, models, original software, adaptive algorithms of pulsed control, and spend equipment permits to regulate penetration,the weld shape, the sizes of heat - affected zone; to predict sired properties and quality of welded joints.

关键词: pulse , null , null , null

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