Strengthening of surface layer of material by wave deformation multi-contact loading

Investigation of the influence of the geometrical dimensions of the striker on the efficiency of energy transfer of shock pulses during wave strain hardening

“…The strength, duration, and energy of the shock pulse in the deformation area obtained from the finite element model correspond to the experimental results with a confidence level of 0.95. 3 The study of the influence of the geometrical dimensions of the striker and the waveguide on the efficiency of energy transfer of shock pulses energy transfer with wave strain hardening 3.1 The study of the influence of the ratio of the L1 striker length to its diameter d1 on the efficiency of the energy of shock pulses transmitted by the shock system to the deformation zone A graphical interpretation of the results of the studies is presented in Figure 2. The smallest fraction of the energy (4-9%) transferred to the deformation was established at the L1/d1 = 0.1 ratio.…”

“…Wave strain hardening (WSH) is the only technology that makes it possible to use the surface plastic deformation method to create a multilayer heterogeneous, naturally reinforced structure in the product surface layer [1][2][3]. The location of such structures at a depth of 6-10 mm can increase the operational properties of machine parts by 3-6 times [1][2][3].…”

“…Wave strain hardening (WSH) is the only technology that makes it possible to use the surface plastic deformation method to create a multilayer heterogeneous, naturally reinforced structure in the product surface layer [1][2][3]. The location of such structures at a depth of 6-10 mm can increase the operational properties of machine parts by 3-6 times [1][2][3]. The technology of wave strain hardening is interesting for modern industry, since it allows us to increase the payload on the material, and thereby open up huge reserves for improving the tactical and technical characteristics of products in aviation, astronautics, automotive, general engineering, tool manufacturing, energy, oil and gas and construction industries.…”

Simulation of multi-contact wave strain hardening

“…The possibility of hardening of plastic materials is achieved through the use of multicontact WSH circuits. This makes it possible not only to reduce the pressure in the deformation zone up to 10 times, but also to increase the processing productivity [2,3]. Under the condition of multi-contact WSH, it becomes necessary to additionally take into account such technological parameters as: Srat -the ratio of the sum of the cross-sectional areas of the instruments and the cross-sectional area of the waveguide; NT -the number of tools in the loading system, pcs; p is the total pressure in the deformation zone, MPa.…”

Visualizing the Process of Forming a Shock Pulse in the Deformation Zone

“…Static preloading provides recovery of the reflected deformation waves. As a result of processing, the depth of the hardened layer is 6-8 mm, and the degree of hardening reaches 150% [5].…”