Cavitation erosion of plasma-sprayed NiTi coatings

Stella, Jorge; Schüller, E.; Heßing, C.; Hamed, O.A.; Pohl, M.; Stöver, D.

doi:10.1016/j.wear.2005.06.002

Cited by 67 publications

(30 citation statements)

References 17 publications

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“…Além destas ligas tem-se pesquisado a utilização de ligas como NiTi e ligas Fe-Mn-Cr-Si para a produção de peças e revestimentos resistentes à cavitação [4][5][6][7][8][9][10][11]. Estes materiais apresentam elevada tenacidade, que combinada com o elevado endurecimento por encruamento e formação de martensita sob solicitação mecânica, conferem a estes materiais uma elevada resistência à cavitação.…”

Section: Introductionunclassified

Influência da refusão por plasma na microestrutura de um revestimento Fe-Mn-Cr-Si depositado por aspersão térmica arco elétrico sobre aço inoxidável ASTM A743-CA6NM

et al. 2012

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Section: Introductionunclassified

Influência da refusão por plasma na microestrutura de um revestimento Fe-Mn-Cr-Si depositado por aspersão térmica arco elétrico sobre aço inoxidável ASTM A743-CA6NM

et al. 2012

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“…The pseudoelastic (PE) behaviour of Nitinol contributes to its enhanced cavitation erosion resistance [7].…”

Section: Chapter 1 Introductionmentioning

confidence: 99%

Cavitation erosion resistance of NiTi thin films produced by Filtered Arc Deposition

Yang

Tieu

Dunne

et al. 2009

Wear

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AcknowledgementsFirst and foremost, I would like to thank my principal supervisor, Professor A. Kiet.Tieu., for providing timely and insightful advice, financial and spiritual support. My supervisor's implicit trust in my research abilities not only allowed me to freely pursue my goals, but also gave me an opportunity to learn how to manage time and allocate resources. Special thanks go to Professor Druce Dunne, for his insightful instruction and for all the generous attention and time he devoted to my research work. Tables Table 5. List of List of Figures AbstractThe objective of this work was to produce near-equiatomic NiTi thin films by filtered arc deposition system (FADS) to improve the cavitation erosion resistance of a steel base working in liquid. First, deposition conditions were optimized in order to obtain near-equiatomic NiTi films. Energy dispersive spectroscopy (EDS) was used to measure the composition of films. It was found that both the substrate bias voltage and arc current affect the compositions of as-deposited NiTi films. X-ray diffractometry (XRD) and transmission electron microscopy (TEM) were used to investigate the microstructures of Ni-rich, Ti-rich and near-equiatomic films. Their thermal behaviours were tested using differential scanning calorimetry (DSC). Atomic force microscopy (AFM), ultra micro-indentation system (UMIS) and Romulus scratch testing were used to measure the roughness, hardness and adhesive force of a near-equiatomic thin film.The cavitation erosion resistance of the near-equiatomic NiTi film was assessed using ASTM Test Method G32. It was found that NiTi thin films showed significantly higher cavitation erosion resistance than 316 austenitic stainless steel. The improved cavitation erosion resistance was attributed to the recoverable deformation associated with pseudoelasticity of the NiTi thin film.The effect of substrate temperature on the properties of NiTi thin films was investigated by preheating substrates to different temperatures (130 C, 300 C, 430 C and 600 C). temperature of 600 C was more resistant to cavitation erosion than films deposited at other bias voltages with a similar substrate temperature.The effect of substrate material on the properties of NiTi thin films was investigated by comparing films on mild steel and on austenitic stainless steel. For similar deposition conditions, the NiTi film deposited on mild steel consisted of B2, B19' and R phases, while the NiTi film on stainless steel was dominated by B2 parent phase. This is probably because the lower thermal conductivity of austenitic stainless steel resulted in a higher deposition temperature.The dominance of the B2 phase for deposition with a high substrate temperature, a high bias voltage and the use of stainless steel substrate was not found to be due to Ni-enrichment of the films, but is consistent with stabilization of the parent phase by possible pick-up oxygen and nitrogen from the chamber atmosphere when the deposition temperature is high.The research program successfully pro...

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“…WC-Co [51]) by means of various methods e.g. High Velocity Oxy-Fuel Thermal Spray (HVOF) [52], [53], PVD [54], [55], [56]), Vacuum Plasma Spraying (VPS) [57], Atmospheric Plasma Spraying (APS) [58], arc spraying (ARC) [44], or Plasma Assisted Physical Vapour Deposition (PAPVD) [59]. Friction stir process (FSP) [28] is, as mentioned, another surface treatment used to reduce grain size and improve CER.…”

Section: Coatingsmentioning

confidence: 99%

“…However, in the case of the applied coating, it was noticed that it was necessary to grind the surface, which affected the increasing CER. Stella et al [57] deposited NiTi coating using vacuum plasma spraying (VPS) on stainless steel 316L. For comparison was used pre-alloyed Ni-Ti powder prepared by the manufacturer by gas atomization (c1), and powder of Ni powder and Ti powder blended in tubular mixer (c2).…”

Section: Coatingsmentioning

confidence: 99%

Cavitation Erosion Resistance Influence of Material Properties

Zakrzewska

Krella

2019

Advances in Materials Science

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The cavitation erosion is the phenomena that causes degradation of fluid flow machinery components due to repetitive implosion of cavitation bubbles adjacent to the solid surface. Cavitation erosion is a complex phenomenon, which includes not only hydrodynamic factors of liquid, but also properties of erodible material e.g. microstructure, hardness or Young modulus. In order to reduce the negative impact of erosion on machine components, there are many methods to increase cavitation erosion resistance. The paper discusses the correlations between structural and mechanical properties and the resistance to cavitation erosion (CER) of pure materials, their alloys and coatings. Methods to increase CER have also been described - using heat / thermo-chemical treatment and application of coatings by various methods.

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Cavitation erosion of plasma-sprayed NiTi coatings

Cited by 67 publications

References 17 publications

Influência da refusão por plasma na microestrutura de um revestimento Fe-Mn-Cr-Si depositado por aspersão térmica arco elétrico sobre aço inoxidável ASTM A743-CA6NM

Influência da refusão por plasma na microestrutura de um revestimento Fe-Mn-Cr-Si depositado por aspersão térmica arco elétrico sobre aço inoxidável ASTM A743-CA6NM

Cavitation erosion resistance of NiTi thin films produced by Filtered Arc Deposition

Cavitation Erosion Resistance Influence of Material Properties

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