Microstructure and mechanical properties of intermetallics on the base of Fe-Al alloy obtained by casting

• Autorzy: Jabłońska M. , Bernstock E. , Jasik A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this work is to study the results of investigations of chromium addition influence on a microstructure and tensile properties of intermetallics from the Fe-Al system based on Fe3Al phase. Design/methodology/approach: The alloys for investigations were prepared by induction melting and gravity casting. The microstructure was analyzed after homogenizing which was performed at 1000*C for 24 and 48 h. Mechanical properties have been analyzed by the tensile tests witch were carried out at ambient temperature. After that the fracture has been analyzed (sample after 48 h). Findings: As a result of microstructure observations of test alloys containing Cr and without Cr addition, the presence of phases and precipitates has been found. In both alloys Fe-28Al and Fe-28Al-5Cr the phases rich in Zr can be observed. Moreover in Fe-28Al-5Cr, phases rich in Cr are present mainly on grains boundaries, whereas Zr is present both on the borders and inside the grains. Carried out tensile tests and the results obtained indicate very low plasticity of both alloy without Cr addition and the alloy with the addition of 5% of Cr. Research limitations/implications: The investigations showed that the most important part of production of iron aluminides is casting process. One can not avoid the casting defects in the materials after casting. Therefore one should particularly pay attentin to melting and casting sequence. After the casting process one should the mechanism and the cause of the formation of phases and particles to get to know. The alternative for these materials so to subject produced in the aim of more far analyses to the plastic deformed. Practical implications: The reasons of formation of Zr, Cr and other phases in these alloys have not been exactly known until now. They can significantly affect the properties of intermetallics from the Fe-Al system. Originality/value: There have been disclosed the phases which are formed during casting and thermal processing in iron aluminides based on Fe3Al phase. They can significantly affect the properties of intermetallics from the Fe-Al system.

Słowa kluczowe

EN

metallic alloys; iron aluminides; Fe-Al alloys; phases; tensile strength

PL

stopy metaliczne; aluminidek żelaza; stopy aluminium-żelazo; fazy; wytrzymałość na rozciąganie

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 10
• Strony: 625--628
• Opis fizyczny: Bibliogr. 17 poz., il., tab., wykr.

Twórcy

autor

Jabłońska M.

autor

Bernstock E.

autor

Jasik A.

• Department of Materials Science, Silesian University of Technology ul. Krasińskiego 8, 40-019 Katowice, Poland,

Bibliografia

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