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Title

Magnetic properties of single crystalline expanded austenite obtained by plasma nitriding of austenitic stainless steel single crystals

AuthorsMenéndez, E.; Templier, Claude; Garcia-Ramírez, Pablo; Santiso, José ; Vantomme, André; Temst, Kristiaan; Nogués, Josep
KeywordsExpanded austenite
Single crystal
nitriding
Austenitic stainless steel
Issue Date2013
PublisherAmerican Chemical Society
CitationACS Applied Materials and Interfaces 5(20): 10118-10126 (2013)
AbstractFerromagnetic single crystalline [100], [110], and [111]-oriented expanded austenite is obtained by plasma nitriding of paramagnetic 316L austenitic stainless steel single crystals at either 300 or 400 C. After nitriding at 400 C, the [100] direction appears to constitute the magnetic easy axis due to the interplay between a large lattice expansion and the expected decomposition of the expanded austenite, which results in Fe- and Ni-enriched areas. However, a complex combination of uniaxial (i.e., twofold) and biaxial (i.e., fourfold) in-plane magnetic anisotropies is encountered. It is suggested that the former is related to residual stress-induced effects while the latter is associated to the in-plane projections of the cubic lattice symmetry. Increasing the processing temperature strengthens the biaxial in-plane anisotropy in detriment of the uniaxial contribution, in agreement with a more homogeneous structure of expanded austenite with lower residual stresses. In contrast to polycrystalline expanded austenite, single crystalline expanded austenite exhibits its magnetic easy axes along basic directions. © 2013 American Chemical Society.
URIhttp://hdl.handle.net/10261/99420
DOI10.1021/am402773w
Identifiersdoi: 10.1021/am402773w
issn: 1944-8244
e-issn: 1944-8252
Appears in Collections:(CIN2) Artículos
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