Publications in 2007

Articles

Labur T. M., Taranova T. G., Kostin V. A., Ishchenko A. Ya., Grigorenko G. M. and Chajka A. A. Nature of fracture of B96 alloy depending on heating conditions in welding // Paton Welding Journal. – 2007. – № 2. – Р. 9

Fracture surface relief peculiarities of samples cut out from different segments of the HAZ of welded joints in high-strength aluminium alloy B96 were studied by fractography analysis method. General laws of crack initiation and propagation at eccentric tension were determined. The reasons for initiation of centers of crack concentration and microcrack formation on grain boundaries were established.

Ryzhov R. N. Influence of pulse electromagnetic actions on formation and solidification of welds // Paton Welding Journal. – 2007. – № 2. – Р. 49

On the basis of experimental investigations efficiency of the weld formation and solidification control processes was estimated using external electromagnetic actions based on application of pulse magnetic fields.

Lebedev V. A. Dependence between the rates of pulsed wire feed and wire melting in welding with short-circuiting // Paton Welding Journal. – 2007. – № 4. – Р. 17

Mathematical model is considered, describing the dependence of the arc process current and the rate of melting of electrode wire on the varying nature of its motion in the process of consumable electrode arc welding, in particular, in short-circuiting of the arc gap.

Labur T. M., Ishchenko A. Ya., Taranova T. G., Kostin V. A., Grigorenko G. M. and Chajka A. A. Influence of thermophysical conditions of welding on fracture resistance of the HAZ metal in the joints of aluminium alloy V96tss // Paton Welding Journal. – 2007. – № 4. – Р. 25

Considered is the influence of volume fraction, morphology and composition of particles containing zirconium and scandium on fracture resistance characteristics of the HAZ metal of a high-strength complex-alloyed aluminium alloy V96tss in fusion arc and electron beam welding.

Kuchuk-Yatsenko S. I., Grigorenko G. M., Novikova D. P., Zagadarchuk V. F., Kharchenko G.K., Grigorenko S. G. and Alekseenko I. I. Effect of energy input on ductile properties of flash butt welded joints in steel X70 // Paton Welding Journal. – 2007. – № 6. – Р. 2

The effect of energy input in flash butt welding of pipes of steel 10G2FB on ductile properties of welded joints was investigated. It is shown that impact toughness of metal of the welded joints is determined by its structural state and grain size. It is recommended to reduce the energy input of the welding process to achieve consistently high ductile properties of the welded joints, as this provides formation of fine-grained two-phase structure in the weld metal, consisting of the MAC-phase in the ferritic matrix.

Pirumov A. Ye., Skachkov I. O., Suprun S. A. and Maksimov Yu. S. Specialized information-measuring system for monitoring the process of arc welding // Paton Welding Journal. – 2007. – № 8. – Р. 34

The structure and functionality of the mobile information-measuring system intended for registration of electric and time parameters of process of arc welding with subsequent statistical processing and graphic interpretation of obtained results are considered.

Kulik V. M., Vasiliev V. G., Grigorenko G. M., Savitsky M. M. and Doroshenko L. K. Phase and structural transformations in welding and arc treatment of 30KhGSA steel joints // Paton Welding Journal. – 2007. – № 9. – Р. 6

Considered are structural changes in weld metal of 30KhGS type on high-strength steel joints occurring in welding and arc treatment. Under these conditions austenite transformation of hardened metal of the joint occurs at temperatures close to A1 and A3 of steel in as-delivered state. Subsequent cooling provides recovery of the hardening structure. Short-time heating in the intercritical temperature range causes formation of a substantial amount of temper ferrite and reduction of the amount of martensite formed during subsequent cooling at the expense of increase of the ferrite and bainite components. This leads to the highest decrease in hardness and increase in impact toughness of the metal. This improvement of properties and increase in crack resistance of the welded joints takes place after short-time heating to tempering temperatures.

Labur T. M., Ishchenko A. Ya., Taranova T. G., Kostin V. A. and Grigorenko G. M. Investigation of the fracture mode of welded joints of high-strength alloy V96tss under the conditions of off-center tension // Paton Welding Journal. – 2007. – № 11. – Р. 16

Regularities of initiation and propagation of cracks in V96tss alloy under the conditions of off-center tension have been studied. Fractographic analysis was used to establish the causes and mechanisms of initiation of fracture sites in individual sections of welded joint HAZ after different conditions of welding heating.