Surface structure and properties of Ti6Al4V alloy laser melted at cryogenic conditions

• Autorzy: Zieliński A. , Jażdżewska M. , Narożniak-Łuksza A. , Serbiński W.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The research work has been to determine whether surface melting of the Ti6Al4V bioalloy with the high power laser, when immersed in liquid nitrogen, would result in an appearance of hard and thick surface layer, containing new structural constituents. Design/methodology/approach: The laser melting of the Ti6Al4V alloy has been made by the CO2 laser at different laser beam energy and scan rate. The specimens have been immersed in liquid nitrogen bath during laser treatment. The Vickers microhardness of cross-sections of the surface layer has been measured, and the microscopic examinations have been performed with the SEM. Findings: The laser melting at cryogenic conditions has resulted in creation of the modified surface layer, up to 1.5 mm thick with HAZ, of properties and structures different from those of the base metal. The layer has been well adjacent to base metal, its microhardness being significantly higher. The numerous zones have been observed within the surface layer, with nitrogen-containing martensite and titanium nitride structures. The negative effect has been an initiation of surface cracks. The laser beam energy has influenced the presence of different zones, their thickness, and number of cracks. Research limitations/implications: So far research has shown that proposed technique can create thick and hard surface layer, containing new structural important components. The new research is necessary in order to establish the laser treatment parameters which permit to avoid cracking and determine the phase constituents and crystallinity within the surface layer. Practical implications: The elaborated technique may be useful in order to improve the surface properties of the Ti alloys for biomedical applications. Originality/value: The paper shows original in the world-scale results of laser treatment of the Ti bioalloy at cryogenic conditions.

Słowa kluczowe

EN

surface treatment; laser treatment; titanium alloys; aluminium alloys

PL

obróbka powierzchni; obróbka laserowa; stopy tytanu; stopy aluminium

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 423--426
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Zieliński A.

• Department of Materials Science and Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

autor

Jażdżewska M.

• Department of Materials Science and Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

autor

Narożniak-Łuksza A.

• Department of Materials Science, Corrosion and Environment Protection, Ship Design and Research Centre, ul. Wały Piastowskie 1, 80-952 Gdańsk, Poland

autor

Serbiński W.

• Department of Materials Science and Engineering, Gdańsk University of Technology, ul. Narutowicza 11/12, 80-952 Gdańsk, Poland

Bibliografia

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