scholarly journals Effect of water-based nanolubricant containing nano-TiO2 on friction and wear behaviour of chrome steel at ambient and elevated temperatures

Wear ◽  
2019 ◽  
Vol 426-427 ◽  
pp. 792-804 ◽  
Author(s):  
Hui Wu ◽  
Fanghui Jia ◽  
Jingwei Zhao ◽  
Shuiquan Huang ◽  
Lianzhou Wang ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
Wear Behaviour ◽  
Nano Tio2 ◽  
Chrome Steel ◽  
Effect Of Water ◽  
Water Based

Research on Lubrication Behaviors of Nano-TiO2 in Water-Based Hot Rolling Liquid

2013 ◽  
Vol 643 ◽  
pp. 139-143 ◽  
Author(s):  
Zuo Xin Zhu ◽  
Jian Lin Sun ◽  
Hai Rui Wei ◽  
Tai Long Niu ◽  
Ze Lang Zhu
Keyword(s):  
Hot Rolling ◽  
Friction And Wear ◽  
Steel Strip ◽  
Nano Particles ◽  
Nano Tio2 ◽  
Stable Dispersion ◽  
Comparison Results ◽  
Water Based ◽  
The Stability ◽  
Average Size

In this paper, nano-TiO2 particles with an average size of smaller than 25 nm, were stable dispersion to water-based hot rolling liquid for steel strip under the effects of dispersant and ultrasonic. The stability of the rolling liquid with nano-TiO2 was characterized by sedimentation method. The tribological properties of the hot-rolling liquid doped with nano-TiO2 were evaluated by using a universal friction and wear tester. Besides, the lubricity of the water-based hot rolling liquid doped with nano-TiO2 for steel strip was evaluated on a hot-rolling tester by using the rolling liquid without nano-TiO2 for comparison. Results indicate that TiO2 Nano-particles as additive are stable dispersion to hot-rolling liquid with appropriate dispersant and process for more than 7 days, also have good friction-reducing, anti-wear, and cooling properties.

scholarly journals Wear and Friction Evaluation of Different Tool Steels for Hot Stamping

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Maider Muro ◽  
Garikoitz Artola ◽  
Anton Gorriño ◽  
Carlos Angulo
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
Hot Stamping ◽  
Steel Specimen ◽  
Wear Behaviour ◽  
Tool Steels ◽  
Uncoated Steel ◽  
Martensitic Microstructure ◽  
Increasing Temperature ◽  
Hot Work Tool Steels

The aim of this work is to investigate the durability of tool steels for hot stamping by comparing the wear resistance of three hot work tool steels. Friction and wear behaviours of different tool steels sliding against a 22MnB5 uncoated steel at elevated temperatures were investigated using a high-temperature version of the Optimol SRV reciprocating friction and wear tester at temperatures of 40 and 200°C. Our results show that friction decreased with increasing temperature, whereas wear of the tool steel increased with temperature for the second and the third tested tool steels. The slightly better wear behaviour of steel specimen 1 comes from the hardness of the carbides in the martensitic microstructure, which are rich in vanadium.

Friction and wear behaviour of high strength boron steel at elevated temperatures of up to 800°C

Wear ◽  
2008 ◽  
Vol 264 (9-10) ◽  
pp. 788-799 ◽  
Author(s):  
J. Hardell ◽  
E. Kassfeldt ◽  
B. Prakash
Keyword(s):  
Friction And Wear ◽  
Elevated Temperatures ◽  
High Strength ◽  
Wear Behaviour ◽  
Boron Steel

scholarly journals An Experimental Research On Friction And Wear Behaviour Of Compact Graphite Iron At Elevated Temperatures

2019 ◽  
Vol 8 (2S11) ◽  
pp. 2630-2633
Keyword(s):  
Friction And Wear ◽  
Thermal Stresses ◽  
Elevated Temperatures ◽  
Testing Machine ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Compact Graphite Iron ◽  
Compact Graphite ◽  
Pin On Disc ◽  
Frictional Forces

Compact Graphite iron (CGI) is mainly used in automobile engine cylinder blocks and disc brakes. CGI has interconnected by vermicular shape graphite. Melting of steel and treatment of CGI is useful for getting sound castings. In automobiles the components manufactured by CGI are exposed to friction including wear, abrasion, thermal stresses and fatigue. Friction and wear characteristics at elevated temperatures are studied in the present study. Friction tests on CGI are conducted with pin on disc wear testing machine between CGI and hard steel disc. The deviations in frictional forces and wear behaviour are observed from the experimental results. The results shows that the wear rate and frictional forces of CGI at 400°C and 500°C temperatures was strongly influenced by the variation in induced temperatures. Scanning Electron Microscopy (SEM) is used to examine CGI pins surfaces. Temperature variations during experiments are influenced the CGI coefficient of friction.

The Effect of Water-Based Therapy Compared to Land-Based Therapy on Balance and Gait Parameters of Patients with Stroke: A Systematic Review

2021 ◽  
pp. 1-9
Author(s):  
Nour Zughbor ◽  
Aisha Alwahshi ◽  
Rahaf Abdelrahman ◽  
Zeina Elnekiti ◽  
Hoda Elkareish ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Berg Balance Scale ◽  
Primary Outcome Measure ◽  
Balance System ◽  
Effect Of Water ◽  
Gait Parameters ◽  
Water Based ◽  
Biodex Balance System ◽  
Therapy Studies ◽  
The Brain

<b><i>Introduction:</i></b> Stroke is defined as the lack of blood supply to the brain, leading to rapid loss of brain function presenting with impairments such as muscle weakness, spasticity, lack of coordination, and proprioception loss. Both hydrotherapy and land-based therapy aim to target these aspects in the process of rehabilitation. The study aims to determine the effectiveness of water-based therapy on balance and gait of patients with stroke compared to land-based therapy. <b><i>Methods:</i></b> Data for this review were extracted from databases such as CINAHL, OTseeker, Ovid, PEDro, and PubMed (MEDLINE) and other sources such as Google Scholar. PRISMA guidelines were followed to exclude irrelevant studies. Only randomized controlled trials (RCTs) were included, and methodological quality was assessed using the PEDro scale. A meta-analysis of extracted data was conducted. <b><i>Results:</i></b> A total of 16 relevant RCTs were included for the review (<i>n</i> = 412 participants). All RCTs investigated the effect of water-based therapy compared to land-based therapy on balance and gait of patients with stroke. Meta-analysis of studies that used the Berg Balance Scale (BBS) as a primary outcome measure favored land-based therapy. Studies that used the Good Balance System (GBS) and the Biodex Balance System (BioBS) to measure the changes in anteroposterior sway and mediolateral sway favored water-based therapy. The overall pooled effect favored land-based therapy in improving gait parameters. <b><i>Conclusion:</i></b> Findings from meta-analysis support the effectiveness of land-based therapy in the improvement of balance and gait parameters of patients with stroke. However, the evidence for water-based therapy continues to be limited, and higher quality studies are required to determine the effectiveness of water-based therapy on patients with stroke, particularly on balance and gait.

A Brief Overview on High Temperature Friction and Wear

2010 ◽  
Author(s):  
Mustafa Bulut Coskun ◽  
Mahmut Faruk Aksit
Keyword(s):  
High Temperature ◽  
Gas Turbines ◽  
Friction And Wear ◽  
Oxidation Behavior ◽  
Elevated Temperatures ◽  
Wear Performance ◽  
Large Pressure ◽  
Higher Power ◽  
Vibratory Motion ◽  
Increasing Temperature

With the race for higher power and efficiency new gas turbines operate at ever increasing pressures and temperatures. Increased compression ratios and firing temperatures require many engine parts to survive extended service hours under large pressure loads and thermal distortions while sustaining relative vibratory motion. On the other hand, wear at elevated temperatures limits part life. Combined with rapid oxidation for most materials wear resistance reduces rapidly with increasing temperature. In order to achieve improved wear performance at elevated temperatures better understanding of combined wear and oxidation behavior of high temperature super alloys and coatings needed. In an attempt to aid designers for high temperature applications, this work provides a quick reference for the high temperature friction and wear research available in open literature. High temperature friction and wear data have been collected, grouped and summarized in tables.

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