Effect of Heat Treatment on the Structure and Properties of Titanium Alloy VT22 Welded Joints Produced by TIG-Welding with Flux-Cored Wire

An important part in affecting the properties of the titanium alloy VT22 is a heat treatment (HT). Annealing of welded joints of the alloy also works as strengthening HT. Depending on the heating temperature, duration of annealing and the cooling rate, different combinations of strength and ductility could be obtained. Annealing is carried out in the VT22 alloy two-phase region (750 - 850 °C) followed by direct or stepwise cooling. This heat treatment results in a maximum heterogeneity of the structure with nearly an equal amount of α and β phases. It also provides a tensile strength of 1100 - 1300 MPa.

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Heat treatment of titanium alloy VT22

Metal Science and Heat Treatment ◽

10.1007/bf00730927 ◽

1990 ◽

Vol 32 (3) ◽

pp. 212-216 ◽

Cited By ~ 2

Author(s):

V. N. Moiseev ◽

Yu. I. Zakharov ◽

Yu. G. Kirillov ◽

Yu. M. Dolzhanskii ◽

T. G. Danilina

Keyword(s):

Heat Treatment ◽

Titanium Alloy ◽

Alloy Vt22 ◽

Titanium Alloy Vt22

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Tensile Property Improvements of Spinodal Cu-15Ni-8Sn by Two-Phase Heat Treatment

Journal of Engineering Materials and Technology ◽

10.1115/1.3225070 ◽

1982 ◽

Vol 104 (3) ◽

pp. 234-240 ◽

Cited By ~ 2

Author(s):

T. J. Louzon

Keyword(s):

Heat Treatment ◽

Single Phase ◽

Phase Region ◽

Two Phase ◽

Heat Treated ◽

Slow Kinetics ◽

Increased Strength ◽

Kinetics Of ◽

Phase Solution ◽

Strength And Ductility

A heat treatment has been developed which produces significant improvements in the tensile properties of Cu-15Ni-8Sn spinodal alloy. The treatment involves solution heat treatment in the two-phase region rather than the single-phase region normally used. After quenching and aging, increased strength and ductility of the alloy over single phase solution heat-treated and aged values were found. The mechanical properties obtained were superior to any previously observed for material of the compositions studied in the solution treated, quenched, and aged condition. Also, the alloys’ transformation kinetics were greatly slowed by the two phase heat-treatment. It is suggested that the increase in strength and slow kinetics of transformation observed are caused by grain size effects and by grain boundary modifications. Resistivity data and etching response corroborate these arguments.

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Effect of Heat Treatment Temperature-Rate Parameters on Structure and Complex of Physical-Mechanical Properties in VST5553 Titanium Alloy Rod Semi-Finished Goods

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.265.785 ◽

2017 ◽

Vol 265 ◽

pp. 785-788

Author(s):

A.V. Zhelnina ◽

A.G. Illarionov ◽

M.S. Kalienko

Keyword(s):

Heat Treatment ◽

Titanium Alloy ◽

Cooling Rate ◽

High Strength ◽

Phase Region ◽

Treatment Temperature ◽

Structure And Properties ◽

Heavy Duty ◽

Two Phase ◽

Temperature Rate

VST5553 titanium alloy is high strength (α + β) - transition alloy which is used for the production of heavy-duty parts [1]. It is known [2], that the cooling rate changing during the heat treatment can change the phases ratio in the alloy. With regards to the VST5553 alloy, this may be due to different cooling rates over the cross section of large-sized semi-finished goods. This in turn affects a complex of properties. Thus, it is necessary to know the effect of the cooling rate of two-phase region on the structure and properties, particularly the VST5553 alloy. However, the research in this area is not sufficient enough. The present study is devoted to this issue.

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Influence of Heating Temperature and Cooling Conditions on Structure and Properties of Two-Phase Titanium Alloy

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.265.646 ◽

2017 ◽

Vol 265 ◽

pp. 646-651

Author(s):

F.V. Vodolazskiy ◽

A.V. Zhloba ◽

Artemiy A. Popov

Keyword(s):

Titanium Alloy ◽

Phase Composition ◽

Heating Temperature ◽

Two Phase ◽

Cooling Conditions ◽

Α Phase ◽

Rate Of Cooling ◽

Temperature Rate ◽

Cooling Air ◽

Strength And Ductility

The effects of heating temperature in the range 790-990 ° C and subsequent cooling in the water, in air, with the furnace on the formation of the structure, phase composition of the titanium alloy VST2 were studied. There was the metastable β-solid solution and α - phase during the quenching heating temperature to 865 °C. The phase composition in the temperature range of 865-915 °C was α + β + α''. There was only α'' - martensite in the structure at the temperatures above 940 °C. Reducing the rate of cooling (air, furnace) helped the retention of two-phase α + β - state after all the heating temperatures. The temperature - rate parameters of heat treatment which can obtain good strength and ductility properties are suggested.

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Influence of Chemical Composition and Heat Treatment Modes on Mechanical Properties of Titanium Alloy VT22 Bars

Russian Internet Journal of Industrial Engineering ◽

10.24892/rijie/20190303 ◽

2019 ◽

Vol 7 (3) ◽

pp. 17-22

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Titanium Alloy ◽

Chemical Composition ◽

Alloy Vt22 ◽

Titanium Alloy Vt22

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Influence of Chemical Composition and Heat Treatment Modes on Mechanical Properties of Titanium Alloy VT22 Bars

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.299.582 ◽

2020 ◽

Vol 299 ◽

pp. 582-587

Author(s):

Yu.B. Egorova ◽

L.V. Davydenko ◽

A.V. Shmyrova

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Titanium Alloy ◽

Chemical Composition ◽

Annealing Temperature ◽

Alloying Elements ◽

Air Cooling ◽

Statistical Research ◽

Alloy Vt22 ◽

Titanium Alloy Vt22

The article provides the results of statistical research on the dependence of the mechanical properties of bars with a 14 mm diameter, made of the titanium alloy VT22, on the heat treatment modes and the chemical composition on the basis of the analysis of experimental, literature and manufacturing data. The authors study the correlation between mechanical properties and the content of alloying elements, admixtures, heat treatment modes. The research finds out regression dependences to evaluate the average values of the mechanical properties of the bars 14х14 mm of the alloy VT22 on the annealing temperature (within an hour, furnace cooling up to 4000С, and further air cooling) and the equivalents of alloying elements and admixtures on aluminium and molybdenum.

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