Scratch and Sliding Wear Testing of Electroless Ni–B–W Coating

2019 ◽  
Vol 142 (2) ◽  
Author(s):  
Vaibhav Nemane ◽  
Satyajit Chatterjee
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Lattice Structure ◽  
Normal Load ◽  
Low Carbon Steel ◽  
Wear Test ◽  
Behavioral Pattern ◽  
Wear Testing ◽  
Low Carbon ◽  
Electroless Ni

Abstract Electroless Ni–B–W coating is deposited on low carbon steel in an alkaline sodium borohydride-reduced electroless bath. The mechanical and tribological properties of such coatings are much necessary to be assessed to carry out application-based studies. The present work focuses mainly on the evaluation of hardness and fracture toughness of electroless Ni–B–W coatings using a scratch tester. Coating's response toward scratching is also studied thoroughly. The characteristic short-range order present in its lattice structure causes the generation of a specific behavioral pattern. Furthermore, a linear sliding wear test is carried out on coatings' surface to analyze the wear behavior at different loading conditions. The specific wear rate is observed to be minimum at a normal load of 22.5 N against Si3N4 counterbody. The patterns of tribological behavior of the coating at different load values are examined from the worn surface morphologies. But before embarking on the scratch and sliding wear tests, the synthesized coatings are characterized under field emission scanning electron microscope and X-ray diffraction in an exhaustive manner. The growth rates with respect to time and the changes in morphological aspects of the coating are also evaluated. The present study establishes electroless Ni–B–W deposits as a suitable option for protecting mechanical components against wear.

Effect of vanadium and rare earth (RE) oxide hardfacing on mechanical and sliding wear behavior of Fe based alloy

2021 ◽  
pp. 095440622110583
Author(s):  
Ravi S Vidyarthy ◽  
Shivaraman Thapliyal ◽  
Dheerendra Kumar Dwivedi
Keyword(s):  
Abrasive Wear ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Welding Process ◽  
Wear Test ◽  
Microstructural Characterization ◽  
Optical Microscope ◽  
Low Carbon ◽  
Shielded Metal Arc Welding ◽  
Scanning Electron

Hardfacing is one of the preferred ways to prolong the life of machine components. In the current paper, efforts have been made to evaluate the flux composition on the hardness and wear behavior of a hard-faced surface. The shielded metal arc welding process was used to deposit the hardfacing layer over low carbon steel. Six different types of iron-based multicomponent flux compositions were developed using FeCr (25–30%), FeV (5%), FeMo (3–4 %), FeTi (2–3 %), Nb (3–4 %), and CeO2 (1–5 %) for hardfacing. The properties of the overlayer were examined using the microstructure study, hardness study, and abrasive wear test. Microstructural characterization was done using an optical microscope and field emission scanning electron microscope. X-ray diffraction was performed to examine the nature of precipitate formation. The worn-out surface and the debris were further examined, employing scanning electron microscopy to study the wear mechanism. The hard-faced surfaces revealed the presence of columnar and dendritic grains. Equiaxed grains were also observed in the sample, which was hard-faced with FeV. The hardness of the hard-faced surfaces was determined using the Vicker’s macro-hardness tester. A maximum hardness of 846.5 ± 2.5 HV was observed for weld overlay. The sliding wear behavior of the surface was investigated using an abrasive wear test performed on the pin-on-disk apparatus. The addition of vanadium to Fe-Cr-C hardfacing flux increased hardness and wear resistance between 3.5 and 6 times, respectively.

Oxidation issues during heat treatment and effect on the tribo-mechanical performance of electroless Ni-P–Cu deposits

2021 ◽  
pp. 146442072199982
Author(s):  
Abhijit Biswas ◽  
Suman Kalyan Das ◽  
Prasanta Sahoo
Keyword(s):  
Heat Treatment ◽  
Mechanical Performance ◽  
Wear Behavior ◽  
Low Carbon Steel ◽  
Treatment Temperature ◽  
Low Carbon ◽  
X Ray ◽  
Treatment Conditions ◽  
Steel Substrates ◽  
Electroless Ni

The present work attempts to study the issues associated with heat treatment of electroless Ni–P–Cu coatings particularly with respect to oxidation and observe their impact on the hardness (micro- and nano-indentation), friction, and wear behavior of the coatings. Electroless Ni–P–Cu coating is deposited on low carbon steel substrates and subjected to heat treatment at temperatures ranging between 400°C and 800°C and for durations of 1 h and 4 h. Additionally, scratch tests are conducted on the coatings to evaluate their abrasion resistance as well as observe the influence of heat treatment conditions on the adhesion of the coatings. The changes in the microstructure of the coatings are suitably captured with various characterization tools, namely, scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction. It is seen that above a heat treatment temperature of 450°C, oxidation of the coating is prominent. Moreover, diffusion of iron from the substrate leads to the formation of intermetallic compounds. The coating performs well when heat-treated around 400°C–450°C. Above 600°C, the performance of the coating degrades with unnecessary oxide formation and other associated phenomena, namely, grain coarsening, flaking, and so on.

scholarly journals Impact-Sliding Tribology Behavior of TC17 Alloy Treated by Laser Shock Peening

2018 ◽  
Author(s):  
Meigui Yin ◽  
Wenjian Wang ◽  
Weifeng He ◽  
Zhenbing Cai
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Wear Test ◽  
Laser Shock Peening ◽  
Wear Testing ◽  
Laser Shock ◽  
Shock Peening ◽  
Multiple Impact ◽  
The Impact

Outer particles collision with certain dynamic object is not a pure impact wear behavior; it is typically accompanied by sliding wear phenomena. This study aimed investigating the impact-sliding wear performance of three different TC17 titanium alloys. One was untreated, and the other two were subjected to laser shock peening (LSP) by 5 and 7 J pulse energy, respectively. Wear test was performed on a novel impact-sliding wear testing rig, which can realize multiple impact-sliding motions by changing motion parameters in x and z directions. Present results showed that wear resistance of both treated samples improved compared with the untreated alloy. Given the increase in wear cycles, increment in wear rate of the untreated sample was constantly higher than those of treated samples. All results can be attributed to the increase in surface hardness of the material and residual compressive stress, which was also introduced after LSP.

Friction Evolution in Running-In of Sliding Wear of Cast Iron Processed in Gleeble

2013 ◽  
Vol 797 ◽  
pp. 713-718
Author(s):  
Qi Zhang ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei ◽  
Guo Liang Xie ◽  
Jing Tao Han
Keyword(s):  
Cast Iron ◽  
Oxide Layer ◽  
Sliding Wear ◽  
Sliding Friction ◽  
Low Carbon Steel ◽  
Wear Test ◽  
Core Layer ◽  
Low Carbon ◽  
Constant Friction ◽  
Pin On Disc

As limited results were reported in terms of the evolution of sliding friction with growth of oxide layer in thickness during running-in, a pin-on-disc wear test was carried out in this study. 4.8Ni-1.5Cr cast iron as core layer and low carbon steel as outer layers, were thermo-mechanically processed via three different routes. For samples with lower hardness due to their predominantly austenitic or martensite retarded matrices, we found that initially rapid increase of thickness of oxide layer continually lowers the sliding friction. However, after the oxide layer was beyond a certain thickness, the sliding friction began to increase consecutively. After a fluctuation of friction caused by the break-down of oxide, a mild equilibrium wear with roughly constant friction followed.

scholarly journals Impact-Sliding Tribology Behavior of TC17 Alloy Treated by Laser Shock Peening

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1229 ◽  
Author(s):  
Meigui Yin ◽  
Wenjian Wang ◽  
Weifeng He ◽  
Zhenbing Cai
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Surface Hardness ◽  
Wear Test ◽  
Laser Shock Peening ◽  
Wear Testing ◽  
Particle Collision ◽  
Laser Shock ◽  
Shock Peening ◽  
The Impact

Outer particle collision with certain dynamic objects is not a pure impact wear behavior; it is typically accompanied by sliding wear phenomena. This study is aimed at investigating the impact-sliding wear performance of three different TC17 titanium alloys. One was untreated, and the other two were subjected to laser shock peening (LSP) by 5 and 7 J pulse energy, respectively. The wear test was performed on a novel impact-sliding wear testing rig, which can realize multiple impact-sliding motions by changing motion parameters in the x and z directions. Present results showed that wear resistance of both treated samples improved compared with the untreated alloy. Given the increase in wear cycles, increment in wear rate of the untreated sample was constantly higher than those of the treated samples. All results can be attributed to the increase in surface hardness of the material and residual compressive stress, which was also introduced after LSP.

Dry Sliding Wear Behavior of Hot Pressed Fe-28Al and Fe-28Al-10Ti Alloys

2011 ◽  
Vol 306-307 ◽  
pp. 425-428
Author(s):  
Jing Li ◽  
Xiao Hong Fan ◽  
De Ming Sun
Keyword(s):  
Plastic Deformation ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Long Distance ◽  
Wear Performance ◽  
Testing Conditions ◽  
Worn Surface

Fe-28Al and Fe-28Al-10Ti alloys were prepared by mechanical alloying and hot pressing. The phases and dry sliding wear behavior were studied. The results show that Fe-28Al bulk materials are mainly characterized by the low ordered B2 Fe3Al structure with some dispersed Al2O3 particles. Fe-28Al-10Ti exhibits more excellent wear resistance than Fe-28Al, especially after long distance sliding wear test. There are obvious differences in wear mechanisms of Fe-28Al and Fe-28Al-10Ti alloys under different testing conditions. Under the load of 100N, there is plastic deformation on the worn surface of Fe-28Al. The main wear performance of Fe-28Al-10Ti is particle abrasion, the characteristics of which are micro cutting and micro furrows, but micro-crack and layer splitting begin to form on the surface of Fe-28Al. Under the load of 200N, serious plastic deformation and work-hardening lead to rapid crack propagation and eventually the fatigue fracture of Fe-28Al. Plastic deformation is the main wear mechanism of Fe-28Al-10Ti under the load of 200N, which are characterized by micro-crack and small splitting from the worn surface.

scholarly journals Impact-sliding wear response of 2.25Cr1Mo steel tubes: Experimental and semi-analytical method

Friction ◽  
2021 ◽  
Author(s):  
Meigui Yin ◽  
Chaise Thibaut ◽  
Liwen Wang ◽  
Daniel Nélias ◽  
Minhao Zhu ◽  
...  
Keyword(s):  
Sliding Wear ◽  
Power Plants ◽  
Mechanical Response ◽  
Wear Behavior ◽  
Wear Test ◽  
Steel Tube ◽  
Wear Depth ◽  
Sliding Velocity ◽  
Friction Forces ◽  
The Impact

AbstractThe impact-sliding wear behavior of steam generator tubes in nuclear power plants is complex owing to the dynamic nature of the mechanical response and self-induced tribological changes. In this study, the effects of impact and sliding velocity on the impact-sliding wear behavior of a 2.25Cr1Mo steel tube are investigated experimentally and numerically. In the experimental study, a wear test rig that can measure changes in the impact and friction forces as well as the compressive displacement over different wear cycles, both in real time, is designed. A semi-analytical model based on the Archard wear law and Hertz contact theory is used to predict wear. The results indicate that the impact dynamic effect by the impact velocity is more significant than that of the sliding velocity, and that both velocities affect the friction force and wear degree. The experimental results for the wear depth evolution agree well with the corresponding simulation predictions.

Influence of reinforcing fiber on the dry sliding wear behavior of hybrid fabric/benzoxazine composites

2019 ◽  
Vol 89 (23-24) ◽  
pp. 5153-5164
Author(s):  
Meng Su ◽  
Lei Liang ◽  
Fang Ren ◽  
Weigang Yao ◽  
Mingming Yu ◽  
...  
Keyword(s):  
High Temperatures ◽  
Tribological Properties ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Wear Test ◽  
Mechanical Analysis ◽  
Dry Sliding Wear ◽  
Fabric Composite ◽  
Fabric Composites ◽  
Wear Tests

Hybrid polyimide (PI)-polytetrafluoroethylene (PTFE)/Nomex fabric composites and Nomex-PTFE/Nomex fabric composites were prepared with benzoxazine (BOZ) as the resin binder. The tribological properties and wear mechanisms of the two composites at different temperatures were investigated using a ball-on-disk wear tester. Before sliding wear tests, a thermo-aging test, thermogravimetric analysis and dynamic mechanical analysis of PI and Nomex fibers were performed to evaluate the thermal properties of the two reinforcing fibers. After each wear test, scanning electron microscopy was employed to analyze the morphologies of the worn surfaces of the composite. The results of sliding wear tests show that the difference between the tribological properties of the two composites is small at room temperature. However, the hybrid PI-PTFE/Nomex fabric composite achieves better tribological properties at high temperatures compared with the hybrid Nomex-PTFE/Nomex fabric composite, which suffered wear failure at 240℃. It is proposed that the excellent thermal mechanical property and thermal stability of PI fibers is the main factor that endows the PI-PTFE/Nomex/BOZ composite with a more favorable tribological property at high temperatures. Moreover, the influence of the increasing temperature on the tribological properties of the two composites was also investigated.

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