| We must work very hard for the sake of the future. | 2 |
| SCIENTIFIC AND TECHNICAL | |
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Ishchenko A.Ya., Lozovskaya A.V. and Sklabinskaya I.E.
Physical simulation of heat processes in HAZ metal during welding aluminium-lithium alloys. | 4 |
| Microstructure, hardness and strength of samples of alloys 1420, 1460 and 1201 produced by the method of simulation of conditions of metal heating in HAZ during fusion welding were studied, including those after additional artificial ageing. It was found that the highest solid solution resistance is characteristic of alloy 1420 (Al-Mg-Li system) which is less susceptible to the metal annealing in HAZ. Alloy 1201 (Al-Cu-Mn system) is mostly weakened in HAZ, its annealing proceeds in the wide temperature range, and properties in this zone are recovered at artificial ageing to the lowest degree as compared with alloys 1420 and 1460 (Al-Cu-Li system). | |
|
Chigarev V.V. and Shchetinin S.V.
Distribution of welding arc pressure. | 8 |
| It was established experimentally that the electromagnetic field induction in the fusion zone grows with the welding speed. This results in an increase of the electromagnetic force and magnetic pressure, directed downwards, that influence the formation of undercuts. | |
|
Cherepivskaya E.V. and Ryabov V.R.
Pressure welding of dispersion-strengthened composite materials, containing silicon carbide particles (Review). | 12 |
| Currently applied methods of producing dispersion-strengthened aluminium-based composite materials, reinforced with silicon carbide particles, are presented. The main physico-chemical and mechanical characteristics of these materials are given, and the current methods of joining dispersion-strengthened aluminium-based materials, as well as the problems arising in solid- and liquid-phase welding of these materials, are considered in detail. | |
|
Labur T.M.
Influence of isolated inner defects on fracture resistance of welded joints on aluminium-lithium alloys. | 19 |
| The effect of discontinuities (isolated inner defects) in welded joints of high-strength aluminium alloys 1421 and 1460 was studied. The nature of change of the alloy mechanical properties and fracture toughness was established, depending on the presence of pores and oxide film inclusions in them. It is shown that oxide film inclusions at the same relative dimensions, as those of the pores, have a greater effect on welded joint properties. | |
|
Demidenko L.Yu. and Onatskaya N.A.
Character of diffusion of carbon within the contact zone in thermal-press electro-hydropulse welding. | 22 |
| It is shown that thermal-press electro-hydropulse welding of tubes to tube sheets results in formation of two bands in the contact zone - the carburized one on the tube side and the decarburized one on the tube sheet side. It has been found that formation of these bands is caused by directed diffusion of carbon, induced by residual tangential stresses with different signs, which are formed in elements being welded. | |
|
Zyakhor I.V. and Kuchuk-Yatsenko S.I.
Peculiarities of formation of friction welded joints between copper and aluminium. | 24 |
| Peculiarities of different types of friction welding of copper to aluminium, such as conventional, inertia and combined welding, are considered. Factors affecting formation of welded joints are analysed on the basis of experimental data. Conditions which determine formation and growth of the intermetallic interlayer in the joining zone are considered. Principles of control of the welding process to provide sound joints have been developed. | |
| INDUSTRIAL | |
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Kopilenko E.A., Pavlenko G.V., Samokhina T.I., Chmykhov N.V. and Yumatova V.I.
Inspection /and testing of welding equipment serial-produced by company "SELMA" and its conformity to requirements of DSTU ISO 9001-95 (fragments of the quality system). | 30 |
| Experience of work of OJSC Electric Machine-Building Plant "SELMA" in the field of inspection and testing of serial-produced welding equipment and assurance of its conformity to the requirements of the quality control system of DSTU ISO 9001-95 is described. The quality strategy is based on a maximum satisfaction of requirements of the customer in conductance of tests to obtain the objective estimate. | |
|
Zamkov V.N. and Akhonin S.V.
New methods for welding titanium and manufacture of unique large-sized titanium semi-finished products. | 33 |
| BRIEF INFORMATION | |
|
Arsenyuk V.V.
Interaction of copper with insoluble impurities under conditions of pulsed deformation in pressure welding. | 33 |
| Interaction of copper with gallium, carbon and inert gases under conditions of vacuum percussion, magnetic-pulse and explosion welding has been investigated. Formation of solid solutions in the mass transfer zone is noted. Dependencies of the concentration of a dissolved element and its penetration depth upon the temperature, strain rate and welding method have been determined. | |
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Brodovoj V.A., Gushcha O.I., Kuzmenko A.Z. and Mikheev P.P.
Interaction of residual stresses in the zones of stress concentrators and fatigue cracks. | 35 |
| It has been experimentally demonstrated that interaction of residual stresses in the zones of stress concentrators and fatigue cracks induced by cyclic loading with stresses induced by strengthening treatment results in the formation of a residual stress field that differs essentially from the initial one. | |
| ADVERTISING. | 44 |
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AS = «Automatic Welding» - 6 issues per year;
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