PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS
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 researc...
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Dnipro National University of Railway Transport named after Academician V. Lazaryan
2014-04-01
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doaj-eca85063fb8e4a3b83757ee01f870b622020-11-25T03:21:30Zeng Dnipro National University of Railway Transport named after Academician V. LazaryanNauka ta progres transportu2307-34892307-34892014-04-015138491PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYSA. YE. Kapustyan0A. V. Ovchinnikov1I. A. Vakulenko2Dep. «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, UkraineDep. «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, UkraineDep. «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, UkrainePurpose. 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.http://stp.diit.edu.ua/article/view/25832/23316titanium alloyspowder metallurgyweldingwelding seamheat-affected zonestructuremechanical properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. YE. Kapustyan A. V. Ovchinnikov I. A. Vakulenko |
spellingShingle |
A. YE. Kapustyan A. V. Ovchinnikov I. A. Vakulenko PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS Nauka ta progres transportu titanium alloys powder metallurgy welding welding seam heat-affected zone structure mechanical properties |
author_facet |
A. YE. Kapustyan A. V. Ovchinnikov I. A. Vakulenko |
author_sort |
A. YE. Kapustyan |
title |
PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS |
title_short |
PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS |
title_full |
PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS |
title_fullStr |
PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS |
title_full_unstemmed |
PRODUCTION OF WELDMENTS FROM SINTERED TITANIUM ALLOYS |
title_sort |
production of weldments from sintered titanium alloys |
publisher |
Dnipro National University of Railway Transport named after Academician V. Lazaryan |
series |
Nauka ta progres transportu |
issn |
2307-3489 2307-3489 |
publishDate |
2014-04-01 |
description |
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. |
topic |
titanium alloys powder metallurgy welding welding seam heat-affected zone structure mechanical properties |
url |
http://stp.diit.edu.ua/article/view/25832/23316 |
work_keys_str_mv |
AT ayekapustyan productionofweldmentsfromsinteredtitaniumalloys AT avovchinnikov productionofweldmentsfromsinteredtitaniumalloys AT iavakulenko productionofweldmentsfromsinteredtitaniumalloys |
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