| 2018 №12 (06) |
DOI of Article 10.15407/as2018.12.07 |
2018 №12 (08) |
Avtomaticheskaya Svarka (Automatic Welding), #11-12, 2018, с. 78-85
Diffusion welding and brazing of dissimilar materials with controlled stress-strain state
V.V. Kvasnitsky1, V.F. Kvasnitsky2, Chen Hexing3, M.V. Matvienko2, G.V. Ermolayev2
1NTTU «Igor Sikorskii Kiev Polytechnic Institute». 37 Pobedi, 03056, Kiev, Ukraine. E-mail: kvas69@ukr.net
2Adm. Makarov National Shipbuilding University 9 Heroev Ukraini Prosp., 54025, Nikolaev, 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 non-metals, as well as similar metals 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. Control of stress-strain state at joining of metals with non-metals allows regulation of relaxation processes at cooling and prevention of joint fracture. 12 Ref., 9 Fig.
Keywords: diffusion welding, brazing, stresses, strains, modeling, structure, mechanical properties, diffusion
Received: 30.03.2018
Published: 06.11.2018
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