A Study of the Influence of Local Heat Treatment on the Structure of Welded Titanium Pipelines

Abstract:

The article analyzes the results of a study of the influence of zonal heat treatment on the structure of welded joints of pipeline elements made of titanium alloys Ti-3.5Al-1.5Mn. In the manufacture of such structures, the TIG welding method is used to join pipe elements, after which the heat treatment method can be used to relieve residual stresses. The experiments have confirmed the effectiveness of zonal heat treatment preceded by welding. It was revealed that for welded joints made of titanium alloys, heat treatment can stabilize the structure. In experiments conducted by the method of optical metallography, the structure of heat treated and untreated welded joints was investigated. The influence of heat treatment on the weld structure and heat-affected zone was identified.

• Periodical: Defect and Diffusion Forum (Volume 410)
• Pages: 37-41
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.410.37
• Online since: August 2021
• Authors: Natalia A. Astafeva, Andrey A. Balanovskiy, Anna A. Pershina*
• Keywords: Local Heat Treatment, Microstructure, Titanium Welds, Welded Joint, Welding

References

[1] B.A. Kolachev, I.S. Pol'Kin, V.D. Talalaev, Titanium Alloys of Various Countries, VILS Moscow, (2000).

[2] R. Boyer, Application of titanium and its alloys, Journal of Materials. 62(5) (2010) 21-24.

[3] R.R. Boyer, An overview on the use of titanium in the aerospace industry, Materials Science and Engineering. 213 (1996) 103-114.

[4] R. Boyer, G. Welsch, E.W. Collings, Materials Properties Handbook: Titanium Alloys, ASM International, United States of America, (1994).

[5] M.A. Khorev, Structural-Phase State and Reliability of Welded Joints of Titanium Alloys, VIAM Moscow, (1991).

[6] E.A. Guseva, M.V. Konstantinova, A.O. Gusev, Ways to improve the reliability of industrial equipment, Bulletin of the Irkutsk State Technical University. 10 (2013) 218-224.

[7] N.A. Astafeva, Welding and closely related technologies in aircraft building. In Aircraft Building and Transport of Siberia: Proc. of the 6th All-Russian Sc. Conf. (2016) 67-72.

[8] N. Astafeva, A. Astafev, Analysis of erosion susceptibility for tungsten electrodes in submerged arc welding, AER-Advances in Engineering Research. 158 (2018) 30-34.

DOI: 10.2991/avent-18.2018.6

[9] V.S. Lyasotskaya, Heat Treatment of Titanium Alloy Welds, Ecomet, Moscow, (2003).

[10] O.S. Kashapov, T.V. Pavlova, N.A. Nochovnaya, Influence of heat treatment modes on the structure and properties of heat-resistant titanium alloy for CVD blades, Aviation Materials and Technologies. 2 (2010) 8-14.

[11] A.A. Popov, A.G. Illarionov, O.A. Oleneva, Structure and properties of welds of high-alloy titanium alloy after heat treatment, Metal Science and Heat Treatment. 52 (2011) 476-480.

DOI: 10.1007/s11041-010-9303-9

[12] A.I. Horev, Creation of the theory of heat treatment and texture hardening of promising titanium alloys, Materials Science. 4 (2009) 28-36.

[13] A.L. Yakovlev, N.A. Pochovnaya, Influence of heat treatment on the properties of sheets made of high-strength titanium alloy VT23M, Aviation Materials and Technologies. 4 (2013) 8-13.

[14] H. Fallahi, Bt N.H. Zulkurnaini and J. Abdullah, Effect of heat treatment on TiAl alloy, IEEE International Conference on Space Science and Communication, Materials Science. (2013) 366-369.

DOI: 10.1109/iconspace.2013.6599497

[15] A.A. Popov, Decomposition processes of the metastable β-phase in titanium alloys with different structures, Heat Treatment and Physics of Metals. 12 (1987) 3-8.

[16] R.R. Wang, G.E. Welsch, Joining titanium materials with tungsten inert gas welding, laser welding, and infrared brazing, The Journal of Prosthetic Dentistry. 5 (1995) 52-530.

DOI: 10.1016/s0022-3913(05)80356-7

[17] A.E. Balanovskiy, Digital visualisation of the process of heating and melting of metal in arc discharge with a non-consumable electrode, Welding International. 6 (2017) 467-476.

DOI: 10.1080/09507116.2016.1268765

[18] A.E. Balanovskii, Invisible structure of the cathode spot of a welding arc with a tungsten Anode and a film cathode burning in an inert gas, High Temp. 57 (2019) 8-16.

DOI: 10.1134/s0018151x19010012

[19] A.E. Balanovskii, Visualization of the process of metal heating and melting in the anode zone in an arc discharge with a tungsten electrode. High Temp. 54 (2016) 627-631.

DOI: 10.1134/s0018151x16050060

[20] Z.P. Ma, C.W. Wang, H.C. Yu, J.C. Yan, H.R. Shen, The microstructure and mechanical properties of fluxless gas tungsten arc welding-brazing joints made between titanium and aluminum alloys, Mater Des. 45 (2013) 72-79.

DOI: 10.1016/j.matdes.2012.09.007

[21] S. Mandal, A.K. Ray, A.K. Ray, Correlation between the mechanical properties and the microstructural behaviour of Al2O3–(Ag–Cu–Ti) brazed joints, Materials Science and Engineering. 383 (2004) 235-244.

DOI: 10.1016/j.msea.2004.06.002

[22] N.A. Astafeva, Development trend of brazed joints of cutting tools made of high-speed steel, Bulletin of the Irkutsk State Technical University. 4 (2007) 129-130.

[23] N.A. Astafeva, A.S. Buzin, Studies on the influence of types preliminary operations on the quality of welded lightweight aluminum alloy structures, Bulletin of the Irkutsk State Technical University. 7 (2018) 10-18.

DOI: 10.21285/1814-3520-2018-7-10-18

[24] A.A. Ilyin, B.A. Kolachev, I.S. Polkin, Titanium Alloys. Composition, Structure, Properties, VI-AS-MATI, Moscow, (2009).