Experimental and Simulation Modeling of Nickel-Based Superalloy Pressure Welding Process

Abstract

The paper presents the results of finite element analysis of plastic deformation in the contact zone of dissimilar superalloys subjected to pressure welding. The results are compared for the two cases: with and without relief on the surfaces of parts to be welded. It is shown that the relief made on the surface can either decrease or increase the area of deformation stagnant zones, depending on the relief shape. The results of simulations are compared with the experimental test results.

Investigation of the Solid-Phase Joint of VT-14 Titanium Alloy with 12KH18N10T Stainless Steel Obtained by Diffusion Welding through Intermediate Layers

“…To obtain stable results, it is advisable to use a thin multilayer tape (Ti + Cu + Ni), which is obtained by hot rolling in a vacuum, as a cushioning material. As a result of this tape, the tensile strength of VT5-1 and AT3 joints with 12KH18N10T steel in tension is 500-590 MPa [5].…”

“…Direct diffusion welding of a titanium alloy with stainless steel leads to residual stresses in the solid-phase joint zone due to a mismatch in the thermal expansion coefficients of the materials being joined and the formation of brittle intermetallic phases in the diffusion zone [4][5][6]. Mutual diffusion between titanium and stainless steel is carried out by the migration of atoms of the same chemical type across the plane of the joint and causes the formation of intermetallic compounds based on Fe + Cr + Ti and Fe + Ti in the reaction zone; these brittle intermetallic compounds worsen the mechanical properties of the formed compound [1].…”

“…An increase in the carbon content in steel from 0.02 to 0.45% leads to a decrease in the strength from 260 to 140 MPa. When using vanadium spacers, the carbon content must be <0.02% [5].…”

“…The technology for rolling these strips has been developed in various organizations [2,5]. Thus, the following materials were identified:…”

Влияние температуры деформации осадкой на формирование мелкозернистой структуры литого сплава системы Ni-Mn-Ga

“…Существенным недостатком данных сплавов является их подвержен-ность разрушению при циклировании через температуру мартенситного превращения. Как известно, применение к различным металлам и сплавам термомеханической обработки приводит к повышению механических ха-рактеристик [13][14][15]. Для исследуемых поликристалли-ческих сплавов Гейслера обработка деформационными методами является одним из решений задачи повыше-ния стабильности функциональных эффектов в матери-алах.…”