Production of weldments from sintered titanium alloys

Authors

  • A. YE. Kapustyan Dep. «Equipment and Welding Technology», Zaporozhye National Technical University, Zhukovsky St., 64, Zaporozhye, Ukraine, 69096, tel. +38 (096) 256 72 60, e-mail aek@zntu.edu.ua, ORCID 0000-0002-8979-8076, Ukraine https://orcid.org/0000-0002-8979-8076
  • A. V. Ovchinnikov Dep. «Mechanics», Zaporozhye National Technical University, Zhukovsky St., 64, Zaporozhye, Ukraine, 69096, tel. +38 (061) 769 83 62, e-mail glotka87@ukr.net, ORCID 0000-0002-5649-1094, Ukraine https://orcid.org/0000-0002-5649-1094
  • I. A. Vakulenko Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnuzt_texmat@ukr.net, ORCID 0000-0002-7353-1916, Ukraine https://orcid.org/0000-0002-7353-1916

DOI:

https://doi.org/10.15802/stp2014/25832

Keywords:

titanium alloys, powder metallurgy, welding, welding seam, heat-affected zone, structure, mechanical properties

Abstract

Purpose. Limited application of details from powder titanium alloys is connected with the difficulties in obtaining of long-length blanks, details of complex shape and large size. We can solve these problems by applying the welding production technology. For this it is necessary to conduct a research of the structure and mechanical properties of welded joints of sintered titanium alloys produced by flash welding. Methodology. Titanium industrial powders, type PT5-1 were used as original substance. Forming of blanks, whose chemical composition corresponded to BT1-0 alloy, was carried out using the powder metallurgy method. Compounds were obtained by flash welding without preheating. Microstructural investigations and mechanical tests were carried out. To compare the results investigations of BT1-0 cast alloy were conducted. Findings. Samples of welded joints of sintered titanium blanks from VT1-0 alloy using the flash butt welding method were obtained. During welding the microstructure of basic metal consisting of grains of an a-phase, with sizes 40...70 mkm, is transformed for the seam weld and HAZ into the lamellar structure of an a-phase. The remaining pores in seam weld were practically absent; in the HAZ their size was up to 2 mkm, with 30 mkm in the basic metal. Attainable level of mechanical properties of the welded joint in sintered titanium alloys is comparable to the basic metal. Originality. Structure qualitative changes and attainable property complex of compounds of sintered titanium alloys, formed as a result of flash butt welding were found out. Practical value. The principal possibility of high-quality compounds obtaining of sintered titanium alloys by flash welding is shown. This gives a basis for wider application of sintered titanium alloys due to long-length blanks production that are correspond to deformable strand semi finished product.

Author Biographies

A. YE. Kapustyan, Dep. «Equipment and Welding Technology», Zaporozhye National Technical University, Zhukovsky St., 64, Zaporozhye, Ukraine, 69096, tel. +38 (096) 256 72 60, e-mail aek@zntu.edu.ua, ORCID 0000-0002-8979-8076

А. Е. Капустян

A. V. Ovchinnikov, Dep. «Mechanics», Zaporozhye National Technical University, Zhukovsky St., 64, Zaporozhye, Ukraine, 69096, tel. +38 (061) 769 83 62, e-mail glotka87@ukr.net, ORCID 0000-0002-5649-1094

А. В. Овчинников

I. A. Vakulenko, Dep. «Materials Technology», Dnipropetrovsk National University of Railway Transport named after Academician V. Lazaryan, Lazaryan St., 2, Dnipropetrovsk, Ukraine, 49010, tel. +38 (056) 373 15 56, e-mail dnuzt_texmat@ukr.net, ORCID 0000-0002-7353-1916

И. А. Вакуленко

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Published

2014-06-25

How to Cite

Kapustyan, A. Y., Ovchinnikov, A. V., & Vakulenko, I. A. (2014). Production of weldments from sintered titanium alloys. Science and Transport Progress, (3(51), 84–91. https://doi.org/10.15802/stp2014/25832

Issue

Section

MATERIAL SCIENCE