scholarly journals THE WEAR RESISTANCE OF THE COATING OF TI - CU DOPED WITH NICKEL

2021 ◽  
pp. 23-27
Author(s):  
V. G. Shmorgun ◽  
O. V. Slautin ◽  
A. G. Serov ◽  
S. A. Kuznetsov ◽  
A. A. Artemyev
Keyword(s):  
Wear Resistance ◽  
Temperature Range ◽  
Ni Content ◽  
Resistance To Wear

The results of a study of the wear resistance of coatings based on cuprides of titaniumin the temperature range of 20-600 С are presented. It is shown that the wear resistance of nickel-doped coatings exceeds the wear resistance of binary coatings. With an increase in the Ni content of more than 10 %, their resistance to wear increases slightly.

Enlarging the Temperature Range for Maximum Wear Resistance of TiNi Alloy Using a NTE Phase

2007 ◽  
Vol 539-543 ◽  
pp. 3261-3266 ◽  
Author(s):  
Iulian Radu ◽  
Dong Yang Li
Keyword(s):  
Wear Resistance ◽  
Thermal Expansion ◽  
Internal Stress ◽  
Frictional Heating ◽  
Negative Thermal Expansion ◽  
High Wear Resistance ◽  
Tini Alloy ◽  
Wear Loss ◽  
Second Phase ◽  
Temperature Range

The near-equiatomic TiNi alloy has been demonstrated to possess high wear resistance, which largely benefits from its pseudoelasticity (PE). However, the PE occurs only in a small temperature range, which makes the wear resistance of this alloy unstable as temperature changes, caused by environmental instability or frictional heating. Therefore, enlarging the working temperature of PE could considerably improve this alloy as a novel wear-resistant material. One possible approach is to develop a self-built temperature-dependent internal stress field by taking the advance of the difference in thermal expansion between the pseudoelastic matrix and a reinforcing phase. Such a T-dependent internal stress could adjust the martensitic transformation temperature to respond changes in environmental temperature so that the temperature range of PE could be enlarged, thus leading to a wide temperature range in which the minimum wear loss is retained. Research was conducted to investigate effects of an added second phase having a negative thermal expansion (NTE) coefficient on the wear resistance of a near-equiatomic TiNi alloy. It was demonstrated that the temperature range of this modified material in which the wear loss dropped was enlarged. In addition, the wear resistance of such a TiNi-matrix composite was on one order of magnitude higher than that of unmodified TiNi alloy.

Influence of Ni content on impact-abrasion wear resistance of medium-carbon low alloy cast steel

2019 ◽  
Vol 6 (10) ◽  
pp. 106594
Author(s):  
Yongxin Xie ◽  
Ying Liu ◽  
Hong Guo ◽  
Wei Li ◽  
Dahai Zeng
Keyword(s):  
Wear Resistance ◽  
Cast Steel ◽  
Medium Carbon ◽  
Ni Content ◽  
Abrasion Wear ◽  
Alloy Cast

Effects of WC–Ni content on microstructure and wear resistance of laser cladding Ni-based alloys coating

2012 ◽  
Vol 206 (8-9) ◽  
pp. 2064-2071 ◽  
Author(s):  
Chun Guo ◽  
Jianmin Chen ◽  
Jiansong Zhou ◽  
Jierong Zhao ◽  
Lingqian Wang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Ni Content

Mechanical and Wear Properties of Al2O3-15wt%ZrO2 Composites

2007 ◽  
Vol 280-283 ◽  
pp. 1049-1052
Author(s):  
Ping Gen Rao ◽  
Jian Qing Wu ◽  
Jian Dong Ye ◽  
Ying Jun Wang ◽  
Mikio Iwasa
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Precipitation Method ◽  
Alumina Powder ◽  
Wear Properties ◽  
Temperature Range ◽  
Al2o3 Matrix

A commercial a-alumina powder was mixed with Zr(OH)4 gel synthesized by a precipitation method. The mixture was calcined at 600°C for 2h. The Al2O3−15 wt% ZrO2 composites were sintered for 2 h in the temperature range between 1400°C and 1650°C in air. At the sintering temperature of 1550°C the highest density, the best wear resistance, the maximum bending strength of 708 MPa and the highest fracture toughness of 5.8 MPa×m1/2 were achieved, respectively. Improvement of the mechanical and wear properties of the Al2O3 matrix should mainly be attributed to the addition of ZrO2.

scholarly journals Effect of Current Density on the Wear Resistance of Ni–P Alloy Coating Prepared through Immersion-Assisted Jet-Electrodeposition

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 527
Author(s):  
Jieyu Xian ◽  
Zhenyu Shen ◽  
Zhengwei Zhang ◽  
Hongbin Wu ◽  
Meifu Jin ◽  
...  
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Surface Quality ◽  
Current Density ◽  
Coating Thickness ◽  
Cell Structure ◽  
Alloy Coating ◽  
Ni Content ◽  
Jet Electrodeposition ◽  
Composition Structure

To improve the wear resistance of 45 steel surfaces, a Ni−P alloy coating was prepared on the surface of 45 steel with an immersion-assisted jet-electrodeposition technology. Scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction and confocal microscopy were used in testing the surface morphology, composition, structure, grain size, and wear scar parameters of the coating. The effect of immersion-assisted jet-electrodeposition on the wear resistance of Ni−P alloy coating at current densities of 20–60 A·cm−2 were explored and analyzed. Results showed that the surface quality, microhardness, and wear resistance of Ni−P alloy coatings prepared through immersion-assisted jet-electrodeposition were improved compared with those of the coatings prepared through traditional jet-electrodeposition. With the increase in the current density, the surface cell structure of the alloy coating was refined, the flatness was improved, the surface Ni content was increased, the grain size was refined, and the coating thickness, the microhardness, and wear resistance showed a trend of first increasing and then decreasing. The best surface quality of the coating was observed at a current density of 50 A·cm−2. Moreover, the unit cell structure was obvious, the surface was flat and dense, the coating thickness was the largest, reaching 21.42 μm, the highest Ni content was obtained (98.25 wt.%), the smallest grain size (6.6 nm) was obtained, the microhardness of the coating reached a maximum value (725.58 HV0.1), and the best wear resistance was observed.

scholarly journals Effect of Gaseous carburizing thermochemical treatment on tribological behavior of Ti–6Al–4V alloy

2021 ◽  
Vol 15 (58) ◽  
pp. 179-190
Author(s):  
Fedaoui Kamel ◽  
Amar Talhi ◽  
Mohamed Zine Touhami
Keyword(s):  
Wear Resistance ◽  
Treatment Time ◽  
Surface Hardness ◽  
Thermochemical Treatment ◽  
Microscopic Analysis ◽  
Hardness Test ◽  
Indentation Load ◽  
Case Hardening ◽  
Resistance To Wear ◽  
Loss Of Mass

This study, concerns the improvement of the hardness and resistance to wear of the Ti-6Al-4V alloy surface by means of thermochemical treatment, for obtaining coatings on the Ti-6Al-4V alloy gives performance of resistance to wear phenomena. Three-thermochemical treatment time (2h, 4h, and 6h) was chosen for investigation of the effect of such treatment on this alloy. The hardness test under an indentation load of 50 gf with a Vickers pyramidal indenter revealed that the surface hardness is 335 Hv for the untreated samples. On the other hand the hardness reaches approximately 1500 Hv during gas cementation at 930 °C for variable times (2h, 4h, 6h) followed by quenching at 840 °C in an oil medium, which was accompanied by a significant improvement in wear resistance. The characterization of the modified surface layers was made by means of a microscopic analysis and by X-ray diffraction. The case-hardening made it possible to obtain a wear resistance greater than that of the alloy not treated, minimal loss of mass by dry friction and an improvement in roughness as well as a good coefficient of friction.

EVALUATION OF TRIBOLOGICAL PROPERTIES OF POWDER PAINT COATINGS USING THE BALL-CRATERING METHOD

Tribologia ◽  
2019 ◽  
Vol 288 (6) ◽  
pp. 57-63
Author(s):  
Jerzy Napiórkowski ◽  
Krzysztof Ligier ◽  
Magdalena Lemecha ◽  
Damian Fabisiak
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Abrasive Wear ◽  
Tribological Properties ◽  
Abrasive Wear Resistance ◽  
Electrostatic Spraying ◽  
Resistance To Wear ◽  
Paint Coatings ◽  
The University ◽  
Spraying Method

The basic method for protecting industrial products against the destructive impact of the environment is to protect them with paint coatings. One of the important characteristics of paint coatings is their resistance to abrasive wear. The study tested three coatings with different granulations obtained by the electrostatic spraying method and then polymerised. The tests were carried out in two ways. Some of them were conducted in accordance with the standards in place at the paint manufacturer’s laboratory, while the testing for abrasive wear resistance was conducted at a laboratory of the University of Warmia and Mazury in Olsztyn. The study involved measurements of thickness, gloss, scratching resistance, and wear using a rotational abrasion susceptibility tester and the ball-cratering method. Based on the obtained results, a different resistance to wear of particular coatings was found depending on the test stand. The study found the suitability of the ballcratering method for the assessment of wear resistance of thin paint coatings. The proposed methodology omits the problem of measuring very small changes in weight, while the obtained wear results are linked to other characteristics of the surface layer.

Influence of Ni Content on Erosive Wear and Destabilization Heat Treatment Conditions Behavior of Multi Component White Cast Iron

2020 ◽  
Vol 998 ◽  
pp. 48-54
Author(s):  
Kenta Kusumoto ◽  
Kazumichi Shimizu
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Cast Iron ◽  
White Cast Iron ◽  
Erosive Wear ◽  
Wear Property ◽  
Eutectic Carbides ◽  
Secondary Carbides ◽  
Ni Content ◽  
Ni Addition

This study investigated the influence of nickel (Ni) addition on erosive wear property of multi-component white cast iron with good erosive wear resistance. Multi-component white cast irons (MWCIs) with 2 mass % of carbon (C), 5 mass % of chromium (Cr), molybdenum (Mo), tungsten (W), niobium (Nb) and 0, 3, 5 mass % of Ni were prepared as experimental materials. The heat treatment condition was quenching by forced air cooling after keeping the specimens at 1123K for 3.6ks. Specimens with size of 50mm×50mm×10mm were tested using a suction-type blasting machine. The test was conducted with impact angle of 30, 60 and 90 deg. at room temperature. Collision particles were irregular steel grids with average particle diameter of 770μm and hardness of 810HV1. The speed of air flow was about 100m/s while the speed of impact particles was around 20.0g/s and the total time of each experiment was 3600 sec.. According to the result, erosion rate was decreased with the increase of Ni content in all of the impact angles. Especially, MWCIs which contain 5 mass % Ni showed the most excellent erosive wear resistance. As reasons, it can be considered that with Ni addition, the volume fraction of eutectic carbides and secondary carbides was increased which enhanced the matrix structure and suppressed the surface deformation of the experimental surface. Therefore, the increasing of eutectic carbides and secondary carbides can be considered as the reason of erosive wear resistance increased.

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