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SUMMARY:Investigation of the local phase composition and morphology of las
 er welded joints based on titanium and aluminum alloys by hard synchrotron
  radiation diffraction methods.
DTSTART;VALUE=DATE-TIME:20200714T103000Z
DTEND;VALUE=DATE-TIME:20200714T105000Z
DTSTAMP;VALUE=DATE-TIME:20260419T043610Z
UID:indico-contribution-1041@indico.inp.nsk.su
DESCRIPTION:Speakers: Alexey Ancharov (Institute of Solid State Chemistry 
 and Mechanochemistry SB RAS)\nLaser welding is one of the most promising m
 ethods in comparison with other methods of welding dissimilar materials. T
 his method does not require the use of additional materials\, special edge
  processing\, and also has a high welding speed. The aim of the work was t
 o study the phase composition and morphology of various zones of the welde
 d joint between alloys based on aluminum and titanium. . The phase composi
 tion and morphology of the welds were studied at the experimental station 
 of the 4th SI channel from the VEPP-3 storage ring. We used the technique 
 of shooting in the light. A thin beam (0.1 mm across the width of the seam
  and 0.4 mm along the length of the seam) of monochromatic synchrotron rad
 iation passes through the welded joint and gives a two-dimensional diffrac
 tion pattern recorded by a two-coordinate flat detector. The use of synchr
 otron radiation made it possible to identify the fundamental laws of the f
 ormation of the micro and nano structure of the weld\, to determine the ma
 in phase composition. Scanning with a thin SR beam for the first time inve
 stigated the structural-phase composition of laser welded joints of dissim
 ilar materials in different zones of the weld from titanium to aluminum at
  different displacements of the laser beam. This allowed us to choose a we
 lding mode in which the strength of a heterogeneous weld increased by 2.5 
 times.   \nThis method\, due to the small diameter of the focused radiatio
 n\, makes it possible to obtain a thin diffusion zone in which intermetall
 ic compounds are formed\, vary the width of this zone due to the movement 
 of laser radiation\, and thereby change the mechanical characteristics of 
 the resulting dissimilar welded joints.   \nThe work on optimizing welding
  conditions and studying the microstructure was carried out in the framewo
 rk of the Program of Fundamental Scientific Research of the State Academie
 s of Sciences for 2013-2020 (project AAAA-A17-117030610122-6). The work wa
 s carried out using the equipment of the Mechanics and Processing Center (
 ITAM SB RAS). Diffraction studies were carried out using the infrastructur
 e of the Siberian Center for Synchrotron and Terahertz Radiation as part o
 f the state task of the Institute of Chemical Technology and Technology of
  the SB RAS (project No. AAAA-A17-117030310280-6).\n\nhttps://indico.inp.n
 sk.su/event/24/contributions/1041/
LOCATION: Zoom 890 9721 5207
URL:https://indico.inp.nsk.su/event/24/contributions/1041/
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