Effects of ZrW2O8 and tungsten additions on the temperature range in which a pseudoelastic TiNi alloy retains its maximum wear resistance

Radu, Iulian; Li, D.Y.

doi:10.1016/j.wear.2007.01.065

Cited by 12 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was shown in [ 35 , 36 ] that the addition of second phases with negative or positive thermal expansion coefficients, but noticeably lower than those of the TiNi austenitic matrix, is an effective way to expand the temperature range in which wear losses are minimal. The greater the difference in thermal expansion coefficient between austenite TiNi and the added second phase, the greater the temperature range of low wear.…”

Section: Discussionmentioning

confidence: 99%

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

Чумаевский

Zykova²,

Sudarikov³

et al. 2023

Materials

View full text Add to dashboard Cite

In the presented work, the effect of friction stir processing admixing the zirconium tungstate ZrW2O8 powder on the microstructure, mechanical and tribological properties of the AA5056 Al-Mg alloy stir zone has been studied. The FSP resulted in obtaining dense composite stir zones where α-ZrW2O8 underwent the following changes: (i) high-temperature transformation into metastable β’-ZrW2O8 and (ii) decomposition into WO3 and ZrO2 oxides followed by the formation of intermetallic compounds WAl12 and ZrAl3. These precipitates served as reinforcing phases to improve mechanical and tribological characteristics of the obtained fine-grained composites. The reduced values of wear rate and friction coefficient are due to the combined action the Hall–Petch mechanism and reinforcement by the decomposition products, including Al2O3, ZrO2, β’-ZrW2O8 and intermetallic compounds such as WAl12 and ZrAl3. Potential applications of the above-discussed composites maybe related to their improved tribological characteristics, for example in aerospace and vehicle-building industries.

show abstract

Section: Discussionmentioning

confidence: 99%

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

Чумаевский

Zykova²,

Sudarikov³

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…25,123 Transformation temperature range can be widened while retaining super-elasticity by addition of zirconium (Zr) and hafnium (Hf). 124 The addition of zirconium retains the phase structure of nickel-titanium alloy, increasing the unit cell volume of alloy and lattice constant. The addition of Zr reduces liquidus temperature and increases the transformation temperature to 200 C. 125 The addition Hafnium (Hf) will result into fully recoverable SME upto 700 MPa.…”

Section: Effect Of Additives On Nitimentioning

confidence: 99%

Fabrication of NiTi alloy: A review

Sharma

Jangra

Raj

2015

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

Nitinol (NiTi) is categorized as a smart material which is highly recognized material for medical and other engineering applications. The behaviour of NiTi can be modified by altering the composition, modifying the porosity and applying external thermal and mechanical treatment. Due to high composition sensitivity, there are several impediments in fabrication of NiTi with conventional techniques which impel the use of additive manufacturing methods. But due to very high cost of equipments, these processes have not been commercialized till now. This paper presents a review on applications, manufacturing NiTi alloy and its various production routes from conventional to rapid prototyping, porous NiTi, effect of additives on properties of the alloy and its challenges.

show abstract

“…However, the thermal stability of ZrW 2 O 8 is not high and α-ZrW 2 0 8 with high NTE transforms into β-ZrW 2 O 8 with low NTE at ~670 K and then decomposes at ~1050 K [26]. Such an instability may interfere not only with fabricating composites [27][28][29] but also strongly limits its application under conditions of intensive frictional heating [23].…”

Section: Introductionmentioning

confidence: 99%

Modeling Wear and Friction Regimes on Ceramic Materials with Positive and Negative Thermal Expansion

Grigoriev,

Shilko,

Dmitriev

et al. 2023

Lubricants

View full text Add to dashboard Cite

Computer modeling of rubbing between two surfaces with microasperities capable of expanding or contracting under conditions of frictional heating (i.e., possessing either positive and negative coefficient of thermal expansion (CTE)) allowed for the identification of wear-and-friction regimes on model ceramic materials. Assuming that no adhesion was involved in the interaction between asperities, two wear regimes—i.e., wear-free and continuous wear—have been revealed in both materials as dependent on the applied normal stress level and sliding velocity. The effect of the normal load on wear rate was similar for both positive and negative thermal expansion ceramics. Sliding velocity has a qualitatively different effect on the wear of materials with either positive or negative thermal expansion. The results indicated that the feasibility of reconstructing wear maps was common for both positive and negative CTE ceramics in terms of dimensionless mechanical and thermophysical characteristics.

show abstract

Effects of ZrW2O8 and tungsten additions on the temperature range in which a pseudoelastic TiNi alloy retains its maximum wear resistance

Cited by 12 publications

References 17 publications

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

In-Situ Al-Mg Alloy Base Composite Reinforced by Oxides and Intermetallic Compounds Resulted from Decomposition of ZrW2O8 during Multipass Friction Stir Processing

Fabrication of NiTi alloy: A review

Modeling Wear and Friction Regimes on Ceramic Materials with Positive and Negative Thermal Expansion

Contact Info

Product

Resources

About