Experimental and Theoretical Study of Redistribution of Alloying Elements in Ni-based Weld Joints at High Temperatures

SOPOUŠEK, Jiří, Jiří BURŠÍK and Pavel BROŽ. Experimental and Theoretical Study of Redistribution of Alloying Elements in Ni-based Weld Joints at High Temperatures. Intermetallics. Netherlands: Elsevier, 2005, 13/2005, No 8, p. 872-878. ISSN 0966-9795.

Basic information

• Original name: Experimental and Theoretical Study of Redistribution of Alloying Elements in Ni-based Weld Joints at High Temperatures
• Name in Czech: Experimentální a teoretické studium přerozdělení legujících prvků ve svarových spojích na bázi Ni za vysokých teplot
• Authors: SOPOUŠEK, Jiří (203 Czech Republic, guarantor), Jiří BURŠÍK (203 Czech Republic) and Pavel BROŽ (203 Czech Republic).
• Edition: Intermetallics, Netherlands, Elsevier, 2005, 0966-9795.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10403 Physical chemistry
• Country of publisher: Netherlands
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 1.557
• RIV identification code: RIV/00216224:14310/05:00012491
• Organization unit: Faculty of Science
• UT WoS: 000229247500010
• Keywords in English: Nickel aluminides; Ni3Al; Diffusion; Phase diagram; DICTRA; element profile; simulation
• Tags: DICTRA, Diffusion, element profile, Ni3Al, Nickel aluminides, Phase diagram, simulation

Abstract

Ni-based diffusion couples were investigated experimentally at 1000ºC and 1200ºC. The experimental results were compared with theoretical calculations. Equilibrium calculations needed were obtained using CALPHAD approach. The diffusion processes were simulated by means of DICTRA program. The thermodynamic database TCNI was used for equilibrium calculations. User kinetic database was taken for evaluation of diffusion fluxes. The experimental techniques of light microscopy and analytical electron microscopy (TEM, SEM, EDAX) were used. An additional microhardness measurement was also performed. Some particular aspects of the joining of the Ni-based superalloys are discussed. An experimental evidence of validity of local phase equilibrium assumption is given.

Abstract (in Czech)

Byly sledovány difúzní páry niklových superslitin při teplotách 1000 a 1200ºC. Výsledky simulací jsou srovnány experimentem. Rovnovážné výpočty jsou provedeny metodou CALPHAD.Je použita experimentalní analytická technika světelné a elektrovové mikroskopie TEM, SEM, EDAX).

Links

• GA106/02/0876, research and development project: Name: Teoretické a experimentální studium modelových soustav na bázi niklu a termodynamický popis fázových rovnováh

Investor: Czech Science Foundation, Theoretical and experimental study of Ni-based model systems and thermodynamic description of phase equilibria

• MSM0021622410, plan (intention): Name: Fyzikální a chemické vlastnosti pokročilých materiálů a struktur

Investor: Ministry of Education, Youth and Sports of the CR, Physical and chemical properties of advanced materials and structures