2018 №12 (06) DOI of Article
2018 №12 (08)

The Paton Welding Journal 2018 #12
TPWJ, 2018, #11-12, 70-76 pages

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #11-12, 2018 (November)
Pages                      70-76
Diffusion welding and brazing of dissimilar materials with controlled stress-strain state

V.V. Kvasnytskyi1, V.F. Kvasnytskyi2, Chen Hexing3, M.V. Matvienko2 and G.V. Yermolayev2
1NTTU «Igor Sikorskii Kyiv Polytechnic Institute» 37 Prosp. Peremohy, 03056, Kyiv, Ukraine. E-mail: kvas69@ukr.net
2Adm. Makarov National Shipbuilding University 9 Heroiv Ukrainy Prosp., 54025, Mykolaiv, Ukraine. E-mail: welding@nuos.edu.ua
3Guangdong Academy of Sciences No.9, Building, 100 Xianlie Rd. Guangzhou, P. R. China. E-mail: chenhexing@gdas.gd.cn

Stress-strain state in vacuum diffusion welding and brazing of dissimilar materials was studied, allowing for plastic deformations of instantaneous plasticity and creep. The role of plastic deformations in joint formation and residual stresses in vacuum diffusion welding of dissimilar metals, in particular of metals with nonmetals, as well as similar materials with interlayers is considered. Application of temperature loading simultaneously with external load at vacuum diffusion welding of dissimilar metals allows creating a bulk stressed state in the butt joint, with formation of axial, radial, circumferential, tangential stresses, promoting localization of plastic deformations in the butt joint zone and development of shear deformations, and intensification of the processes of formation of physical contact, activation of the surfaces and development of diffusion processes, respectively. Control of stress-strain state at joining of metals with nonmetals allows regulation of relaxation processes at cooling and prevention of joint fracture. 12 Ref., 9 Figures.
Keywords: diffusion welding, brazing, stresses, strains, modeling, structure, mechanical properties, diffusion
Received:                30.03.18
Published:               23.11.18
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