EFFECT OF SEVERE PLASTIC AND HEAVY COLD DEFORMATION ON THE STRUCTURAL AND MECHANICAL PROPERTIES OF COMMERCIALLY PURE TITANIUM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F17%3AN0000013" target="_blank" >RIV/26316919:_____/17:N0000013 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/18:43951215

Výsledek na webu

<a href="http://mit.imt.si/Revija/izvodi/mit175/palan.pdf" target="_blank" >http://mit.imt.si/Revija/izvodi/mit175/palan.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2016.307" target="_blank" >10.17222/mit.2016.307</a>

Jazyk výsledku

angličtina

Název v původním jazyce

EFFECT OF SEVERE PLASTIC AND HEAVY COLD DEFORMATION ON THE STRUCTURAL AND MECHANICAL PROPERTIES OF COMMERCIALLY PURE TITANIUM

Popis výsledku v původním jazyce

SPD (severe plastic deformation) processing of materials provides a great potential associated with the enhancement of their properties by refining the initial grain structure. The present experiments involved mechanical working of commercial-purity titanium (Ti Grade 2) with the CONFORM SPD technique, which is one of the SPD methods, and with rotary swaging. The objective was to process the material at as low temperatures as possible in order to avoid softening processes and, therefore, to achieve the maximum strengthening through a microstructure refinement. Three passes through a CONFORM SPD machine were completed and the resulting ultimate strength was 673 MPa. The average grain size was 330 nm. The greatest improvement of the mechanical properties was achieved in the first pass. In the subsequent passes, the contributions were minor. The processing in the CONFORM SPD machine did not impair the ductility of the material. Subsequently, the wires were rotary swaged. The ultimate strength achieved was 1070 MPa. The response of the properties to this forming method was markedly different. The reason is that rotary swaging does not belong to SPD techniques. It causes rapid work hardening and reduces the ductility of the material. The workpiece was subsequently investigated with the aid of several techniques. Light and transmission electron microscopy and X-ray diffraction were employed for evaluating the grain size, distribution and orientation.

Název v anglickém jazyce

EFFECT OF SEVERE PLASTIC AND HEAVY COLD DEFORMATION ON THE STRUCTURAL AND MECHANICAL PROPERTIES OF COMMERCIALLY PURE TITANIUM

Popis výsledku anglicky

SPD (severe plastic deformation) processing of materials provides a great potential associated with the enhancement of their properties by refining the initial grain structure. The present experiments involved mechanical working of commercial-purity titanium (Ti Grade 2) with the CONFORM SPD technique, which is one of the SPD methods, and with rotary swaging. The objective was to process the material at as low temperatures as possible in order to avoid softening processes and, therefore, to achieve the maximum strengthening through a microstructure refinement. Three passes through a CONFORM SPD machine were completed and the resulting ultimate strength was 673 MPa. The average grain size was 330 nm. The greatest improvement of the mechanical properties was achieved in the first pass. In the subsequent passes, the contributions were minor. The processing in the CONFORM SPD machine did not impair the ductility of the material. Subsequently, the wires were rotary swaged. The ultimate strength achieved was 1070 MPa. The response of the properties to this forming method was markedly different. The reason is that rotary swaging does not belong to SPD techniques. It causes rapid work hardening and reduces the ductility of the material. The workpiece was subsequently investigated with the aid of several techniques. Light and transmission electron microscopy and X-ray diffraction were employed for evaluating the grain size, distribution and orientation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MATERIALS AND TECHNOLOGY

ISSN

1580-2949

e-ISSN

1580-3414

Svazek periodika

51

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

5

Strana od-do

849-953

Kód UT WoS článku

000415994800021

EID výsledku v databázi Scopus

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