期刊
PHILOSOPHICAL MAGAZINE
卷 95, 期 36, 页码 4143-4160出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2015.1115906
关键词
residual stress; anisotropic elasticity; Fe-based alloys; Ni-Ti alloys; nitrides; EBSD
Gaseous nitriding of ferritic Fe-Cr and austenitic Ni-Ti solid solutions reveals that the extent of the uptake of dissolved nitrogen depends on the crystallographic orientation of the surface grains of the substrate. In both ferritic and austenitic substrates, the surface nitrogen concentration and the nitriding depth decrease upon increasing the smallest angle between the surface normal and the normal of a {100} plane of the surface grain considered. This phenomenon could be ascribed to the residual compressive macrostress developed during nitriding which varies as a function of crystallographic orientation of the (surface) grains due to the elastically anisotropic nature of ferrite and austenite solid solutions investigated in this study.
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