Research on Tribology and Surface Engineering

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (20 July 2023) | Viewed by 1581

Special Issue Editors


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Guest Editor
Department of Mechanics, Energy and Biotechnology Engineering, Vytautas Magnus University, 44248 Kaunas, Lithuania
Interests: tribology; friction; wear; lubricants; additives; ionic liquids; coatings

E-Mail Website
Guest Editor
Department of Mechanics, Energy and Biotechnology Engineering, Vytautas Magnus University, 44248 Kaunas, Lithuania
Interests: tribology; friction; wear; material science; coatings
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Dramatically rising energy costs push forward energy-saving technologies. It is well known from Professor Peter Jost’s report and confirmed by many studies that solutions to tribological problems can reduce energy loss and improve machinery performance. Unfortunately, despite the enormous scientific attempts to reduce friction and wear, friction consumes about 1/3 of the world's primary energy, and wear causes about 80% of machine parts to fail. On top of that, environmental legislation has restricted the usage of many high-performance lubricants and their additives. The recent situation demands a summarization of up-to-date knowledge and sharing of the most recent discoveries in the field of tribology.

This Special Issue aims to review state-of-the-art tribological studies and present new outstanding results contributing to reducing friction and wear. Topics include but are not limited to high-performance, eco-friendly lubricants and additives; wear-resistant and low-friction-possessing coatings; surface micro-texturing; and novel friction materials. We sincerely hope that contributions to this Special Issue will push forward novel friction and wear reduction solutions to be implemented in the industry.

Dr. Raimondas Kreivaitis
Dr. Audrius Žunda
Guest Editors

Manuscript Submission Information

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Keywords

  • friction
  • wear
  • lubrication
  • lubricant additives
  • wear-resistant coatings
  • surface engineering
  • friction materials

Published Papers (1 paper)

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Research

19 pages, 9970 KiB  
Article
Wear Study of Straw Chopper Knives in Combine Harvesters
by Vytenis Jankauskas, Robertas Abrutis, Audrius Žunda and Justinas Gargasas
Appl. Sci. 2023, 13(13), 7384; https://doi.org/10.3390/app13137384 - 21 Jun 2023
Viewed by 1182
Abstract
Cereal straw is a biomaterial with great potential: about 144 million tons of biomass are grown annually in Europe. For any use of straw (fertilizer, biofuel, etc.), efficient chopping technology, i.e., the reliable and efficient operation of mobile or stationary choppers, is the [...] Read more.
Cereal straw is a biomaterial with great potential: about 144 million tons of biomass are grown annually in Europe. For any use of straw (fertilizer, biofuel, etc.), efficient chopping technology, i.e., the reliable and efficient operation of mobile or stationary choppers, is the key factor for further success. Since most of the straw is chopped at harvest time, the subject of the study is the wear of the combine’s chopping knives. Six blades of different materials and designs were tested under realistic conditions during wheat and rapeseed harvesting on 180 ha. The influence of hardness, composition, cutting edge angle, and position in the chopper on knife wear was analyzed. The study showed that the blades with the highest cutting edge hardness (568 ± 11 HV) and the lowest cutting edge angle (20.9°) had the lowest wear. The highest hardness of the induction hardened knives was due to the 0.42% carbon content of the steel. The study confirmed that wear was inversely proportional to the hardness of the cutting edge (the harder the cutting edge, the lower the wear) and directly proportional to the angle of the cutting edge (the higher the angle, the greater the wear). The SEM study showed that part of the tooth surface of the blades was covered by permanent deposits of the material to be shredded. This wear was not caused by the interaction between straw and blade but by microabrasive particles that contaminated the straw. Full article
(This article belongs to the Special Issue Research on Tribology and Surface Engineering)
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