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Content available remote Metallographic study of porosity in IN713C superalloy in as-cast and after creep test
Szczotok A.
Czasopismo Techniczne. Mechanika
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2016
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Y. 113, iss. 4-M
21--26
EN
The paper summarizes the results of observation and quantitative analysis of porosity in IN713C superalloy in as-cast and after the creep test. The sources of porosity in castings are shortly described and the methodology of pores measurement is circumscribed. The results of pores in as-cast and after the creep test were shown and, finally, the interpretation of the result was presented.
PL
W artykule przedstawiono wyniki obserwacji i badań ilościowych porowatości występującej w nadstopie IN713C w stanie lanym i po próbie pełzania. Scharakteryzowano pokrótce źródła powstawania porowatości w odlewach. Metodyka pomiaru porów opisano i przedstawiono uzyskane wyniki pomiarów wraz z ich interpretacją.
2
Content available Grain size reduction in the 713C nickel superalloy as a result of heat treatment
Lachowicz M. B., Faryna M., Podrez-Radziszewska M.
Archives of Foundry Engineering
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2011
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Vol. 11, iss. 2 spec.
143--148
EN
The paper presents metallographic test results for the 713C nickel superalloy after heat treatment and crystallographic orientation analysis performed with the EBSD method. The 713C alloy was subjected to annealing in the temperature of 950 ºC for 30 hours followed by aircooling. As a result of the applied heat treatment the local grain size reduction in the alloy was observed. It has been found that in the primary grains the new subgrains of different crystallographic orientation are created. Between the new grains and the primary grains the boundaries of high angle appear. Orientation change in the micro-areas is closely related to the carbides rebuilding and volume diffusion of elements dissolved in the γ - γ’ alloy matrix and the (NbTi)C carbides.
3
Content available remote Microstructural changes in padding welds made from the 713C alloy after heat treatment
Lachowicz M. B.
Archives of Foundry Engineering
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2010
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Vol. 10, iss. 3 spec.
11--16
EN
The following paper presents the results of the metallographic research of the padding welds made from cast alloy Inconel 713C that had undergone heat treatment in four different time and temperature variants. Annealing was applied at temperatures 1150oC and 950oC. The results of the research showed a strong coalescence of precipitation of the intermetalic γ’ phase (Ni3Al), resulting in formation of subgrains. The coalescence of the γ’ particles ran simultaneously with a diffusive decomposition of carbides (NbTi)C, which caused the supersaturation of the γ’ phase with niobium, and the loss of its coherence with austenite γ. The phenomenon of the formation of subgrains intensified with the lengthening of the time of annealing. The analysis of the results showed that heating the alloy that had undergone pad welding to the temperatures used in the research is detrimental to the alloy because of the loss of the strengthening of the coherent γ’ phase and the increase of the brittleness.
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