Abstract
Ni and Ni(W) solid solution of bulk Ni and Ni-W alloys (Ni-10W, Ni-30W, and Ni-50W) (wt%) were mechanically compared through the evolution of their {111} X-ray diffraction peaks during in situ tensile tests on the DiffAbs beamline at the Synchrotron SOLEIL. A significant difference in terms of strain heterogeneities and lattice strain evolution occurred as the plastic activity increased. Such differences are attributed to the number of brittle W clusters and the hardening due to the solid solution compared to the single-phase bulk Ni sample.
Highlights
IntroductionBecause of their good mechanical properties such as high hardness and wear resistance [1], nickel-tungsten (Ni-W) alloys are competitive materials that can be used to replace chrome deposits.In addition, they have better magnetic [2], tribological [3], corrosion [4,5,6], and electrical [7] properties.These alloys are generally produced by electrodeposition (ED) [8,9,10,11,12,13,14,15,16,17], magnetron co-sputtering [18], mechanical alloying [19], sintering processes [1,7], and thermal plasma-processes [20]
As already discussed in [7], the nickel one (Ni)-30W and Ni-50W alloys are made of fine-grained multi-crystalline clusters of W surrounded by randomly oriented grains of Ni(W)
To illustrate the microstructure of the alloys, Ni-50W Electron backscatter diffraction (EBSD) phase map is presented in Figure 1 where the Ni(W) solid solution and W clusters appear in red and in green, respectively
Summary
Because of their good mechanical properties such as high hardness and wear resistance [1], nickel-tungsten (Ni-W) alloys are competitive materials that can be used to replace chrome deposits.In addition, they have better magnetic [2], tribological [3], corrosion [4,5,6], and electrical [7] properties.These alloys are generally produced by electrodeposition (ED) [8,9,10,11,12,13,14,15,16,17], magnetron co-sputtering [18], mechanical alloying [19], sintering processes [1,7], and thermal plasma-processes [20]. Because of their good mechanical properties such as high hardness and wear resistance [1], nickel-tungsten (Ni-W) alloys are competitive materials that can be used to replace chrome deposits. They have better magnetic [2], tribological [3], corrosion [4,5,6], and electrical [7] properties. The dissolution of tungsten atoms in the nickel lattice causes a shift of the fcc Bragg peaks towards lower scattering angles [7,13,19,22,23].
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