Effect of Ni Content on Electrochemical Properties of Passive Films Formed on Fe-Ni Alloys

The work-hardening behavior of Cu–Ni alloys with high stacking-fault energies (SFEs) is experimentally investigated under uniaxial compression. It is found that, with the increase of Ni content (or short-range clustering, SRC), the flow stress of Cu–Ni alloys is significantly increased, which is mainly attributed to an enhanced contribution of work-hardening. An unexpected multistage (including Stages A, B, and C) work-hardening process was found in this alloy, and such a work-hardening behavior is essentially related to the existence of SRC structures in alloys. Specifically, during deformation in Stage B (within the strain range of 0.04–0.07), the forming tendency to planar-slip dislocation structures becomes enhanced with an increase of SRC content (namely, increase of Ni content), leading to the occurrence of work-hardening rate recovery in the Cu–20at.% Ni alloy. In short, increasing SRC in the Cu–Ni alloy can trigger an unexpected multistage work-hardening process, and thus improve its work-hardening capacity.

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THE INFLUENCE ON Ni-CONTENT ON THE Ms-TEMPERATURE OF Cu-Zn-Al-Ni ALLOYS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19824102 ◽

1982 ◽

Vol 43 (C4) ◽

pp. C4-639-C4-640 ◽

Cited By ~ 2

Author(s):

N. Mwamba ◽

L. Delaey

Keyword(s):

Ni Alloys ◽

Ni Content

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Effects of Ni content and sintering temperature on the microstructure and mechanical properties of TiC-Ni composites fabricated by selective carburization of Ti-Ni alloys

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.155000 ◽

2020 ◽

Vol 834 ◽

pp. 155000 ◽

Cited By ~ 5

Author(s):

Hanjung Kwon ◽

Chang-Yul Suh

Keyword(s):

Mechanical Properties ◽

Sintering Temperature ◽

Ni Alloys ◽

Ni Content ◽

Microstructure And Mechanical Properties

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XPS and NEXAFS Investigation of Electronic Energy Structure of Ti-Ni and TiNi-Cu Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.738-739.128 ◽

2013 ◽

Vol 738-739 ◽

pp. 128-133 ◽

Cited By ~ 1

Author(s):

Boris Senkovskiy ◽

Dmitry Usachov ◽

Alla Chikina ◽

Pavel Ulyanov ◽

Alexander Shelyakov ◽

...

Keyword(s):

Interatomic Bond ◽

Pure Metal ◽

Electronic Energy ◽

Energy Structure ◽

Full Potential ◽

Electronic Energy Structure ◽

Cu Content ◽

Ni Alloys ◽

Cu Alloys ◽

Ni Content

The electronic energy structure of Ti-Ni and TiNi-Cu alloys has been studied experimentally by XPS and NEXAFS and theoretically by the full-potential local-orbital minimum-basis code. The study has revealed formation in the valence band of the Ti50Ni50 alloy of a common d-band through hybridization of the d-states of Ti with those of Ni, which is localized within a narrow binding-energy interval. This brings about an intra-atomic redistribution of Ti electron density in the Ti50Ni50 alloy compared to the pure metal: decrease of the occupancy of the Ti d-shell is countered by an increase in the number of Ti p-electrons. The occupancy of the Ti d-shell in the TiNi-Cu alloys, where Ni atoms are partially substituted by Cu, and in the Ti-Ni alloys with an excess of the Ni is more than in the equiatomic Ti50Ni50 alloy. The occupancy of the Ni and Cu d-shells in the Ti-Ni and TiNi-Cu alloys is independent of the atomic composition. The Ti d-shell sensitivity to variation of the nearest atomic environment is apparently due to their relatively itinerant behavior in the studied alloys. The results obtained suggest that the increase of the stiffness of an interatomic bond in the TiNi-Cu alloys with increasing Cu content and in the Ti-Ni alloys with increasing Ni content is possibly associated with the filling of Ti bonding d-states.

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