Effect of carbon and boron additions on segregation behavior of directionally solidified nickel-base superalloys with rhenium

Autor:	Heng-zhi Fu, Si-feng Gao, Jun Zhang, Xinbao Zhao, Lin Liu, Qin Hu
Rok vydání:	2013
Předmět:	inorganic chemicals Materials science Metallurgy Metals and Alloys chemistry.chemical_element Liquidus Solidus Rhenium equipment and supplies Geotechnical Engineering and Engineering Geology Condensed Matter Physics Carbide Superalloy chemistry Materials Chemistry Solvus Boron Carbon
Zdroj:	Transactions of Nonferrous Metals Society of China. 23:3257-3264
ISSN:	1003-6326
Popis:	The phase transformation temperature, segregation behavior of elements and as-cast microstructure were investigated in experimental nickel-base superalloys with different levels of carbon and boron. The results show that the liquidus temperature decreases gradually but the carbide solvus temperature increases obviously with increasing carbon addition. Minor boron addition to the alloy decreases the liquidus temperature, carbide solvus temperature and solidus temperature slightly. Apart from rhenium, the segregation coefficients of the elements alter insignificantly with the addition of carbon. The segregation behavior of rhenium, tungsten and tantalum become more severe with boron addition. The volume fraction and size of primary carbides increase with increasing carbon addition. The main morphology of the carbides is script-like in the alloys with carbon addition while the carbide sheets tend to be concentrated and coarse in the boron-containing alloys.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b9f670a2b855343be86562ebcb859e25 https://doi.org/10.1016/s1003-6326(13)62861-7 Zobrazit plný text záznamu Full Text from ScienceDirect