Effect of Plastic Deformation on the Crystal Structure and Crystallization Activation Energy of Ni-W-P Alloy Coating

Wang, Yuehua; Yu, Meiqi; Qiao, Qi; You, Fei; Li, Cailing; Xu, Zhefeng; Matsugi, Kazuhiro; Yu, Jingkun

doi:10.1007/s11665-015-1551-9

Cited by 10 publications

(3 citation statements)

References 23 publications

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“…The application of plastic deformation and elevated test temperature may lead to the initiation or further phase transformation of the coatings. 46 The phase transformation during the wear process at room and elevated temperatures has been reported by several researchers. 27,35,47 Such phase transformations may improve the mechanical properties of the coating and cause microstructural changes that lead to enhanced tribological behavior at high temperatures.…”

Section: Tribological Characteristics Of Ni-b-w Coatingmentioning

confidence: 83%

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Mukhopadhyay

Barman

Sahoo

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Sodium borohydride reduced electroless NiB coatings possess high hardness, wear resistance, and low coefficient of friction. They are found to be suitable candidates for wear reduction of mechanical components. In a quest to achieve enhanced tribological behavior and high thermal stability, the present work reports the inclusion of W to NiB coatings. Electroless method is employed for NiB -W coating deposition on AISI 1040 steel specimens. Post deposition, the coatings are heat treated at 350 C, 400 C, and 450 C. Deposit characterization is carried out using energy-dispersive X-ray analysis, X-ray diffraction, and scanning electron microscopy. Inclusion of W leads to an increase in microhardness and thermal stability of NiB coatings. The tribological behavior of as-deposited and heat-treated NiB -W coatings are investigated at room and elevated temperatures (100 C, 300 C, and 500 C). Heat-treated coatings show lower wear rate at room temperature compared to as-deposited ones but the coefficient of friction increases. Tribological test results at elevated temperatures suggest an improvement in the wear resistance and coefficient of friction at 300 C and 500 C in comparison with 100 C. Phase transformation study post wear test indicate microstructural changes in the coating due to the in situ heat treatment at high temperature. The tribological behavior of the coatings at 100 C and 300 C is mainly governed by the loose wear debris and formation of debris patches, respectively. Whereas at 500 C, formation of protective tribo-oxide patches is also observed.

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Section: Tribological Characteristics Of Ni-b-w Coatingmentioning

confidence: 83%

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Mukhopadhyay

Barman

Sahoo

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…An applied stress during melt deformation may thus bring strain energy into the system and helps to distort and/or disrupt chains of silica tetrahedra that ultimately favor the formation of crystal nuclei. A decrease in activation energy during deformation-induced crystallization has been observed in various type of material such as polymers (Sun et al, 1984;Chien and Weiss, 1988;Kumaraswamy et al, 1999;Xu et al, 2011), metal alloys (Lee et al, 2006;Wang et al, 2015), oil and butter (Yang et al, 2011), and metals (e.g., Donovan and Stobbs, 1981;Chen et al, 1994) and might explain impact-induced vesiculation of magmas (Rothery et al, 2007;Carey et al, 2012).…”

Section: Possible Origins Of Deformation-induced Crystallizationmentioning

confidence: 99%

The Effects of Deformation on the Early Crystallization Kinetics of Basaltic Magmas

et al. 2019

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Crystals and bubbles nucleate and grow in a magma that experiences a range of temperatures, pressures and strain-rates. We have a good conceptual and sometimes quantitative understanding of how crystallization and bubble nucleation are controlled by decompression and cooling. Here we explore the effect of strainrate on the crystallization kinetics of magmas. In order to understand the interaction between deformation and crystallization, samples of basalt were deformed during their crystallization. We made measurements at subliquidus conditions (1160 • C) and deformed samples in compression at strain-rates varying from 0 to 2 × 10 −4 s −1 for a total strain of 0.31. We simultaneously imaged the samples using X-ray microtomography. Without deformation, no crystallization was observed over the course of a 260 min experiment. Once deformation was applied, crystallization initiated. Deformation increased the nucleation rate, increased crystal growth rates, and decreased the incubation time. Increasing the strain-rate, however, does not show a discernable effect of crystallization kinetics. We hypothesize that deformation may have an effect on the parameters that govern the crystallization kinetics of magmas, such as activation energy and diffusion by changing chemical potentials.

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“…Similarly, mechanical and corrosion behavior of the ternary Ni-W-P coating can be extremely enhanced by the electroless Ni-W-P coating [23]. The ternary Ni-W-P coating was prepared with the method of spray electrodeposition by Wang et al [24] and the effect of plastic deformation on the crystal structure and crystallization kinetics was studied. It is found that when the plastic deformation reaches 20%, the Ni-W-P alloy coating begins to crystallize.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the mechanical performance of the electroless Ni–W–P coating based on fractal theory

Ren

Cheng

Han

et al. 2019

Surf. Topogr.: Metrol. Prop.

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Engineering surface shows fractal characteristics, and mechanical performance of electroless Ni-W-P coating with fractal parameters can avoid the effects of instrument resolution and sampling length. In the present work, the ternary Ni-W-P coatings were deposited on mild steel (1015) polished with various sandpapers. Surface morphology of coating and mechanical property, including matrix roughness, adhesion strength, friction behavior and elastic modulus were investigated by using scanning electron microscopy (SEM) and MFT-4000 multifunctional material surface performance instrument, respectively. The results present that the mechanical property of the electroless Ni-W-P coating is affected by the fractal features. The stress in the direction of matrix surface is considered to decrease due to the rougher matrix. Meanwhile, the elements are prone to be deposited and the adhesion strength between Ni-W-P coating and matrix is seen to increase. The experiments also indicate that the friction coefficient of coating reduces as the fractal dimension of coating increase. However, the regularity of the relationship between fractal dimension and elastic modulus of Ni-W-P coating is inconspicuous while the elastic modulus is mainly affected by its own chemical component. The work provides evidence that the fractal dimension has a significant influence on the mechanical property of the electroless Ni-W-P coating. Nomenclature V deposition rate [mg mm −2 h −1 ]RECEIVED

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Effect of Plastic Deformation on the Crystal Structure and Crystallization Activation Energy of Ni-W-P Alloy Coating

Cited by 10 publications

References 23 publications

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

Tribological behavior of electroless Ni–B–W coating at room and elevated temperatures

The Effects of Deformation on the Early Crystallization Kinetics of Basaltic Magmas

Investigation on the mechanical performance of the electroless Ni–W–P coating based on fractal theory

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