Effect of cold deformation on age hardening of alloy VT35

The effect of cold deformation on the variation of hardness during aging of sheets from alloy VT35 with β-structure is studied. Diagrams of isothermal transformations due to aging of alloy VT35 with β-phase are plotted for sheets without work hardening and for sheets with an initial β-structure subjected to cold rolling.     

Structure and mechancal properties of titanium alloy VT35 in the cast condition

Conclusion In a large ingot (1 ton) of alloy VT35 the distribution of chemical elements both over the cross section and over the height is uniform, the macrostructure of the ingot is similar to the structure of other two-phase titanium alloys, and the microstructure is almost the same in different parts of an ingot. The mechanical properties in different parts of an ingot are the same, i.e., the strength is low and the ductility is significant. All of this points to the high promising cast properties of alloy VT35 and also that there should not be any complicated technical problems connected with chemical inhomogeneity.Scientific Research Institute of Aviation Materials, Moscow. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 36–38, September, 1993.     

Isothermal treatment of alloy KhN35VT

Conclusions Isothermal treatment of alloy KhN35VT results in a long-term strength and, particularly, long-term plasticity at 650°C that are higher than after standard heat treatment, and short-term characteristics that are somewhat lower.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 35–37, July, 1971.     

Age hardening characteristics of Cu-Ag-Zr alloy

Cu-Ag-Zr alloy is a newly developed copper alloy material which has an excellent combination of high mechanical strength and high electrical conductivity. By means of vacuum induction melting, Cu-Ag-Zr alloy was produced. The effects of aging processes on the microhardness and electrical conductivity characteristics of Cu-Ag-Zr alloy were studied. After aging at 450 °C for 4h, the alloy showed an excellent combination of microhardness and electrical conductivity: the microhardness and electrical conductivity reach 126 HV and 84%IACS, respectively. The precipitates responsible for the age-hardening effect are the fine and dispersed Cu₅Zr, which has a face center cubic structure. Cu₅Zr precipitates are fully coherent with the Cu matrix and give the Cu-Ag-Zr alloy higher microhardness and higher electrical conductivity.     

Processes of dynamic aging of VT16 titanium alloy

The use of dynamic aging in heat treatment improves the mechanical properties of alloys, first of all, the strength characteristics under conditions of static (both short- and long-term) and cyclic loading and the resistance to brittle and ductile fracture. Therefore, the processes of dynamic aging that can be treated as a variant of thermomechanical treatment have been studied in detail in several works and have been used for strengthening parts made of steels of pearlitic, martensitic, and austenitic classes, beryllium bronze. Duralumin-type alloys, etc. At the same time, data on the effect of dynarrlic aging on the properties of titanium alloys are very scarce. The present article is devoted to this problem.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 16 – 20, July, 1996.     

The fracture of titanium alloy VT3-1

Metal Science and Heat Treatment -     

Decomposition ofβ phase in titanium alloy VT22

Conclusion The low ductility of alloy VT22 after isothermal quenching and also after quenching in water and aging at 250–300° is due to the formation of phase, the formation of and phases at 350–400°, and the formation of phase at temperatures above 400°.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 47–48, September, 1971.     

Structural conversions in VT22 titanium alloy during aging

Conclusion For two-phase high-strength alloys of the VT22 type, as for -alloys of titanium, the presence of an incubation period for the formation of -phase during aging is characteristic. The signs for this process are the following: enchanced etchability of the surface of thin sections; formation of zones which do not have an interface with the matrix but differ from it in etchability (zones of presegregation of -phase); a change in the intensities of the -phase lines on the x-ray diffraction patterns. Decomposition of the -solid solution in titanium alloys of the VT22 type is a multistep process, including formation of segregates (onset of stratification of the -solid solution), regions of the Guinier—Preston zone type, various intermediate states, coherent states of the formed -phase, and finally the appearance of isolated -phase, having an interface with the matrix -solid solution.Pskov Filiate of St. Petersburg State Technical University. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 33–37, August, 1992.     

Conversions upon isothermal treatment of the pseudo-beta-titanium alloy VT35

VIAM Scientific-Industrial Association; Verkhne-Saldinsk Metal-Working Production Association. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 22–25, March, 1992.