scholarly journals Role of Graphite in Cast Iron on Tribological Behavior in Nano-Scratch Test

2012 ◽  
Vol 6 (7) ◽  
pp. 1046-1056 ◽  
Author(s):  
Ryuta NAKAMURA ◽  
Akira IWABUCHI
Keyword(s):  
Cast Iron ◽  
Tribological Behavior ◽  
Scratch Test ◽  
Nano Scratch Test

scholarly journals A Comparative Study in the Tribological Behavior of DLC Coatings Deposited by HiPIMS Technology with Positive Pulses

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 174 ◽  
Author(s):  
Jose A. García ◽  
Pedro J. Rivero ◽  
Eneko Barba ◽  
Ivan Fernández ◽  
Jose A. Santiago ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Tribological Behavior ◽  
High Hardness ◽  
Scratch Test ◽  
Low Friction ◽  
Dlc Coatings ◽  
Useful Life ◽  
Scratch Tests ◽  
Deposition Techniques

During the last few decades, diamond-like carbon (DLC) coatings were widely used for tribological applications, being an effective tool for improving the performance and the useful life of different machining tools. Despite its excellent properties, among which stand out a high hardness, a very low friction coefficient, and even an excellent wear resistance, one of the main drawbacks which limits its corresponding industrial applicability is the resultant adhesion in comparison with other commercially available deposition techniques. In this work, it is reported the tribological results of a scratch test, wear resistance, and nanoindentation of ta-C and WC:C DLC coatings deposited by means of a novel high-power impulse magnetron sputtering (HiPIMS) technology with “positive pulses”. The coatings were deposited on 1.2379 tool steel which is of a high interest due to its great and wide industrial applicability. Finally, experimental results showed a considerable improvement in the tribological properties such as wear resistance and adhesion of both types of DLC coatings. In addition, it was also observed that the role of doping with W enables a significant enhancement on the adhesion for extremely high critical loads in the scratch tests.

Tribological behavior of jaspilite evaluated by micro-scratch test

2017 ◽  
Author(s):  
Renan Magnol ◽  
Marciano Macedo ◽  
Marcelo de Macêdo ◽  
Cherlio Scandian
Keyword(s):  
Tribological Behavior ◽  
Scratch Test

scholarly journals The role of soot particles in the tribological behavior of engine lubricating oils

Wear ◽  
2013 ◽  
Vol 304 (1-2) ◽  
pp. 152-161 ◽  
Author(s):  
Enzhu Hu ◽  
Xianguo Hu ◽  
Tianxia Liu ◽  
Ling Fang ◽  
Karl D. Dearn ◽  
...  
Keyword(s):  
Tribological Behavior ◽  
Soot Particles ◽  
Lubricating Oils

Monitoring of EDM parameters to develop tribo-adaptive Ti6Al4V surfaces through accretion of alloyed matrix

2019 ◽  
Vol 72 (3) ◽  
pp. 291-297
Author(s):  
Jibin T. Philip ◽  
Deepak Kumar ◽  
S.N. Joshi ◽  
Jose Mathew ◽  
Basil Kuriachen
Keyword(s):  
Electrical Discharge Machining ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Removal Rate ◽  
Advanced Materials ◽  
Surface Alloying ◽  
Electrically Conductive ◽  
Content Type ◽  
Pulse On Time

Purpose Electrical discharge machining (EDM) is well-known for its credibility in the processing of advanced materials, which are electrically conductive. The strenuous effort associated with machining of Ti6Al4V (Ti64) using conventional methods, and its low tribological behavior, present an immediate need to develop solutions to monitor and improve the compatible techniques such as EDM. Design/methodology/approach The present work includes following: monitoring the ED process parameters, namely, current (I) and pulse on time (Ton), in controlling the material removal rate and surface roughness (Ra and Sa) for development of tribo-adaptive surfaces; and investigation on the role of oxides pertinent to the tribo-behavior of Ti64 (bare and EDMed) surfaces. Findings The tribological behavior of Ti6Al4V surfaces got remarkably improved through ED machining, which points to the credibility of the process to establish itself as a surface alloying technique. The recast layer (RL, alloyed matrix) acted as a protective coating; stable enough to assist the developed tribo-oxides such as TiO and Ti8O15 in rendering improved sliding performance at load = 50 N and speed = 0.838 ms−1. Originality/value The surface modification through ED machining was experimentally proven to improve the wear behavior of Ti6Al4V surfaces.

Role of Subordinate Phases on the Dry Impact-Abrasion Behavior of Low Chromium Cast Iron

2019 ◽  
Vol 26 (12) ◽  
pp. 1797-1805
Author(s):  
Yu Pei ◽  
Renbo Song ◽  
Yi Li ◽  
Zhiyang Zhao ◽  
Yingchao Zhang
Keyword(s):  
Cast Iron ◽  
Chromium Cast Iron

Tribological behavior of laser textured nodular cast iron surface

2019 ◽  
Vol 71 (7) ◽  
pp. 949-955
Author(s):  
Yongmei Zhu ◽  
Junjie Chen ◽  
Jiajun Du ◽  
Yujie Fan ◽  
Jifei Zheng
Keyword(s):  
Cast Iron ◽  
Tribological Behavior ◽  
Surface Texturing ◽  
Nodular Cast Iron ◽  
Area Ratio ◽  
Brake System ◽  
Resin Matrix ◽  
Dry Sliding ◽  
Brake Disc ◽  
Content Type

Purpose Previous publications were mainly focused on the effect of textures under lubrication. Under dry sliding, area ratio of surface texturing (pit area ratio) and diameter of pit affect the tribological behavior. This paper aims to investigate the effect of laser surface texturing on tribological behavior of nodular cast iron under dry sliding. Design/methodology/approach Pit-like textures with different diameters and spaces were fabricated by laser on nodular cast iron (QT600-3). Using nodular cast iron (QT600-3) as the disc specimen and resin matrix composites (UCV018) as the pad specimen, the tribological test was performed with pin-on-disk reciprocating tribo-tester. Findings The coefficient of friction (COF) of the non-textured specimen was larger than that of the textured one. For the same pit diameter, a larger pit area ratio induced a slight decrease of COF, while wear volume decreased significantly. The pit diameter induced a slight decrease of COF as the pit area ratio, but its effect was weaker. Practical implications The experimental studies will help to improve the brake system such as structure modeling of brake disc. Predicting the performance and life of the brake disc in vehicle based on tribological behavior checked in test, it was proved that pit-like texture had application value in vehicle brake system. Originality/value This paper showed that the effect of pit area ratio on friction and wear was greater than that of pit diameter. The experimental results will be useful to the design on safety brake disc.

The Effect of Molybdenum on the Tribological Behavior of Nfgrey (8) Cast Iron

2014 ◽  
Vol 3 (3) ◽  
pp. 126
Author(s):  
J. O. Agunsoye ◽  
Sefiu Bello ◽  
Talabi S. I. ◽  
Hassan S. B. ◽  
Moumoh K. I.
Keyword(s):  
Cast Iron ◽  
Tribological Behavior
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