Strengthening Mechanisms in Nickel-Copper Alloys: A Review

The present work attempts to study the issues associated with heat treatment of electroless Ni–P–Cu coatings particularly with respect to oxidation and observe their impact on the hardness (micro- and nano-indentation), friction, and wear behavior of the coatings. Electroless Ni–P–Cu coating is deposited on low carbon steel substrates and subjected to heat treatment at temperatures ranging between 400°C and 800°C and for durations of 1 h and 4 h. Additionally, scratch tests are conducted on the coatings to evaluate their abrasion resistance as well as observe the influence of heat treatment conditions on the adhesion of the coatings. The changes in the microstructure of the coatings are suitably captured with various characterization tools, namely, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. It is seen that above a heat treatment temperature of 450°C, oxidation of the coating is prominent. Moreover, diffusion of iron from the substrate leads to the formation of intermetallic compounds. The coating performs well when heat-treated around 400°C–450°C. Above 600°C, the performance of the coating degrades with unnecessary oxide formation and other associated phenomena, namely, grain coarsening, flaking, and so on.

show abstract

“…This segregation may occur because of the large differences in the melting point between nickel (1455°C) and copper (1085°C). 27…”

Section: Resultsmentioning

confidence: 99%

Oxidation issues during heat treatment and effect on the tribo-mechanical performance of electroless Ni-P–Cu deposits

Biswas

Das

Sahoo

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…These elements are frequently added to commercial alloys for solid solution strengthening, precipitation hardening, and transformation hardening. [46][47][48][49] Thermodynamic calculations for phase stability were performed in Thermo-Calc version 2020a using the TCHEA4 High Entropy Alloy database. 50 The design algorithm we adopted is similar to the one reported earlier that led to MPEA1.…”

Section: Thermodynamic Calculation For Substituting Ru In Mpea1mentioning

confidence: 99%

Corrosion of Ni-Fe-Cr-Mo-W-X Multi-Principal Element Alloys

Panindre

Khalifa

Taylor

et al. 2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

An extraordinarily corrosion-resistant non-equimolar high entropy alloy with the composition Ni38Fe20Cr21Mo6W2Ru13 (referred to here as MPEA1) has been reported. Ruthenium is one important reason why the alloy exhibits excellent passivity and resistance to localized corrosion in a variety of environments. The goal of this study was to replace Ru in MPEA1 with commodity elements such as Mn, Al and Cu while minimizing the penalty on corrosion performance. Thermodynamic calculations were performed to survey the phase diagram for a stable disordered face centered cubic (fcc) phase at elevated temperatures. Five test compositions analogous to MPEA1 were conceptualized based on this design strategy. In two of these candidate alloys, the Ru content was substituted wholly by additional Fe or Ni. The other three contain Mn, Al, or Cu, respectively. Corrosion performance and passive behavior of these alloys in 0.6 M NaCl and 6 M HCl were evaluated using cyclic potentiodynamic polarization and single-frequency impedance experiments. Solutionized forms of all five alloys were found to resist localized corrosion in 0.6 M NaCl. Despite forming oxide films of similar thickness in 0.6 M NaCl solutions, X-ray photoelectron spectroscopy revealed non-congruent dissolution of constituent elements. The role of alloying elements in influencing the oxide formation process was indicated.

show abstract

“…With the rapid development of material science and the increasing demands for highperformance parts in modern technology, alloy parts have been widely used [1]. Copper-nickel alloy has good mechanical properties, high temperature strength, corrosion resistance, wear resistance, non-magnetic and other characteristics.…”

Section: Introductionmentioning

confidence: 99%

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

He,

Gao,

Tang

et al. 2024

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

The effects of tool rake angle and cutting depth on cutting temperature, cutting force, friction coefficient of rake tool face, atomic accumulation of chip flow and removal, surface quality, sub-surface damage layer thickness, atomic stress, and dislocation evolution were studied by molecular dynamics simulations. The results showed that the cutting temperature was concentrated on the chip, and the chip was easy to flow out with the increase of the tool rake angle, which weakens the extrusion and shearing action of the workpiece, resulting in the gradual reduction of tangential force. The tool rake angle of 10° is beneficial to improve the surface/subsurface quality of the workpiece. The minimum root-mean-square roughness obtained was 0.73 Å. The atomic stress of the workpiece was mainly concentrated around the area of interaction with the tool, and the atoms on the finished surface underwent elastic recovery, so the atomic stress was not significant. The 1/6<112> (Shockley) dislocation density had always been in the leading position, and 1/6<112> (Shockley) dislocation was continuously synthesized and decomposed during the nano-cutting process. With the increase of cutting depth, the number of atoms removed increases rapidly, and the width of chip side flow increases, but the symmetry is weakened. The contour line map even shows deep wave valleys caused by the absence of atoms, which increases the surface roughness. Moreover, the area and depth of the atomic stress distribution in the subsurface layer increase, and the number of amorphous atoms and dislocation density increase.

show abstract

Strengthening Mechanisms in Nickel-Copper Alloys: A Review

Cited by 51 publications

References 69 publications

Oxidation issues during heat treatment and effect on the tribo-mechanical performance of electroless Ni-P–Cu deposits

Oxidation issues during heat treatment and effect on the tribo-mechanical performance of electroless Ni-P–Cu deposits

Corrosion of Ni-Fe-Cr-Mo-W-X Multi-Principal Element Alloys

Study on the atomic removal behavior and damage formation mechanism of nano cutting copper–nickel alloy with diamond tool

Contact Info

Product

Resources

About