Water jet erosion behaviour of Ti-Ni binary alloys

Shida, Yoshiaki; Sugimoto, Yoshiki

doi:10.1016/0043-1648(91)90064-2

Cited by 100 publications

(40 citation statements)

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“…Suzuki [55] and Shida [56] also reported good erosion resistance of NiTi alloys under slurry and water jet conditions. Excellent cavitation erosion resistance of NiTi was reported by Richman [57].…”

Section: Pseudoelasticitymentioning

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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Section: Pseudoelasticitymentioning

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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“…Recently, it has been recognized that the equiatomic TiNi alloy possesses excellent resistance to the erosion by water jets, slurries and cavitation because of its pseudoelasticity Li, 1998;Qiao, et al, 2005;Shida and Sugimoto, 1991;Wu, et al, 2000;Zhang and Li, 2002). Hence, the relationship between pseudo elasticity and erosion resistance of TiNi alloy has attracted increasing interests of researchers.…”

Section: Introductionmentioning

confidence: 99%

Influence of pseudoelasticity on mechanical behavior of TiNi alloy under dynamic impact loading

Cui

Zheng

et al. 2007

Pet. Sci.

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The mechanical behavior of TiNi alloy and Crl2MoV alloy under dynamic impact loading was investigated with a self-made impact testing system. The real-time contact force was measured with a piezoelectric force sensor and digital signal processing system during impact. Equations for predicting instantaneous velocity and displacement were presented. The results showed that the TiNi alloy exhibited a plateau of maximum contact force with increasing impact height. At the plateau stage, TiNi alloy in the parent phase can absorb impact energy and keep the maximum contact force nearly identical due to its pseudoelasticity.

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“…However, the NiTi alloys have poor cold workability due to their high work-hardening rate [1]. On the other hand, NiTi shows high resistance to wear as well as to cavitation erosion with exceptionally long incubation periods (elapsed cavitation time without measurable mass loss) [2][3][4][5][6]. This feature, related to the shape memory effect, has been understood by the capacity of these materials to absorb energy by the martensitic transformation process.…”

Section: Introductionmentioning

confidence: 99%

NiTi thermal sprayed coatings characterization

Cinca

Isalgué²,

Fernández

et al. 2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. NiTi alloy has been particularly studied over many years for its shape memory properties and excellent corrosion resistance and biocompatibility, thus making it suitable for many biomedical applications. Then, bulk material properties have been well characterized depending on the nominal composition, manufacturing method and thermal treatments. It has been, however, less studied the use of such alloy in its overlay form, many times just employing Vacuum Spraying (VPS) for thick coatings in order to avoid Ti oxidation. The present study explores and compares the spraying of atomized NiTi powders by VPS as well as by Atmospheric Plasma Spraying (APS) and High Velocity Oxygen Fuel (HVOF). X-ray diffraction studies conducted at metastable rhombohedral NiTi phase at low temperatures and at room temperatures and higher the result was beta phase. DSC experiments also supported the previous phase transformations. After spraying, according to the thermal history of the particles in each spraying technology, it is observed the retention of the -NiTi feedstock phase as well as the appearance of metastable phases, amorphization and nanocrystalline areas. Also with XRD at different temperatures and, especially in the case of the HVOF coating, due to the moderate heat input of the process, the final results fairly agreed with those of the original powder.

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Water jet erosion behaviour of Ti-Ni binary alloys

Cited by 100 publications

References 1 publication

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

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

Influence of pseudoelasticity on mechanical behavior of TiNi alloy under dynamic impact loading

NiTi thermal sprayed coatings characterization

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