Producing a gradient-composition nanocrystalline structure on nitrided surfaces of invar-type Fe-Ni alloys using megaplastic deformation

Autor:	Svetlana G. Titova, N. V. Kataeva, S. V. Borisov, V. A. Shabashov, S. V. Afanas’ev, A. V. Litvinov
Rok vydání:	2014
Předmět:	Austenite Materials science Metallurgy Intermetallic chemistry.chemical_element engineering.material Nitride Condensed Matter Physics Nanocrystalline material chemistry Materials Chemistry engineering Surface layer Tin Nitriding Invar
Zdroj:	The Physics of Metals and Metallography. 115:871-883
ISSN:	1555-6190 0031-918X
DOI:	10.1134/s0031918x14090117
Popis:	A nanocrystalline Fe-Ni matrix strengthened by dispersed CrN and TiN nitrides has been produced on the ion-plasma-nitrided surfaces of the austenitic Fe-Ni38-Cr15 and Fe-Ni36-Ti4 alloys using cyclic “nitride dissolution-nitride precipitation” phase transformations induced by megaplastic deformation. The high-pressure torsion of the nitrided alloys has led to the dissolution of the CrN nitrides and Ni3Ti intermetallic compounds, which appeared in the matrix, in the surface layer and to the mechanical alloying of the nitrided subsurface layer and the unnitriderd bulk of the specimens. Subsequent annealing has resulted in the formation of secondary nitrides, which propagated to a depth substantially exceeding the thickness of the original nitrided layer.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::510d6a899caa69051df1c89f53466dfb https://doi.org/10.1134/s0031918x14090117 Zobrazit plný text záznamu Full text from SpringerLink