Flavien Foko Foko, Christopher W. Burkhart, S. Thielen, B. Sauer
{"title":"Analysis of the Sealing Capability of Radial Shaft Sealing Rings Using a Semi-Analytical Contact Model","authors":"Flavien Foko Foko, Christopher W. Burkhart, S. Thielen, B. Sauer","doi":"10.2474/trol.17.97","DOIUrl":"https://doi.org/10.2474/trol.17.97","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"6 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74369479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Tani, N. Tagawa, Shouhei Kawada, Renguo Lu, S. Koganezawa
{"title":"Young’s Modulus of Fatty Acid Adsorption Films on Si Surface Measured Using Ar Gas Cluster Ion Beams","authors":"H. Tani, N. Tagawa, Shouhei Kawada, Renguo Lu, S. Koganezawa","doi":"10.2474/trol.17.110","DOIUrl":"https://doi.org/10.2474/trol.17.110","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"87 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82388251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identification of Tribological Phenomena in Glass Grinding by Acoustic Emission Sensing","authors":"Kouki Imai, A. Hase","doi":"10.2474/trol.17.86","DOIUrl":"https://doi.org/10.2474/trol.17.86","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"39 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81599133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Miho Morita, Shodai Tachiyama, K. Onodera, A. Hase
Sulfur and phosphorus additives are used in lubricants as extreme-pressure and antiwear agents, which are typically used together to ensure reliability over a wide range of lubrication conditions. However, the working mechanism of the combined additive system has not been clearly defined due to difficulties obtaining information on the material surface where these additives work. This is because this surface is constantly being worn during testing. Therefore, in situ analysis applying an acoustic emission (AE) technique was proposed. AEs are elastic stress waves generated during the deformation and fracture of solids, which can be measured in real-time, providing information with respect to the magnitudes and types of damage. In this paper, an application of the AE helps to clarify how each additive acts on the surface in real-time. The working mechanism to understand improved reliability using both sulfur and phosphorous additives was investigated by the AE technique, along with conventional surface analysis methods. It is concluded that wear reducing properties were improved by the reaction of sulfur additives to remove the protruded parts, followed by the reaction of phosphorous additives to form a protective antiwear film.
{"title":"Study on Reaction Mechanism of Sulfur and Phosphorus Type Additives Using an Acoustic Emission Technique","authors":"Miho Morita, Shodai Tachiyama, K. Onodera, A. Hase","doi":"10.2474/trol.17.78","DOIUrl":"https://doi.org/10.2474/trol.17.78","url":null,"abstract":"Sulfur and phosphorus additives are used in lubricants as extreme-pressure and antiwear agents, which are typically used together to ensure reliability over a wide range of lubrication conditions. However, the working mechanism of the combined additive system has not been clearly defined due to difficulties obtaining information on the material surface where these additives work. This is because this surface is constantly being worn during testing. Therefore, in situ analysis applying an acoustic emission (AE) technique was proposed. AEs are elastic stress waves generated during the deformation and fracture of solids, which can be measured in real-time, providing information with respect to the magnitudes and types of damage. In this paper, an application of the AE helps to clarify how each additive acts on the surface in real-time. The working mechanism to understand improved reliability using both sulfur and phosphorous additives was investigated by the AE technique, along with conventional surface analysis methods. It is concluded that wear reducing properties were improved by the reaction of sulfur additives to remove the protruded parts, followed by the reaction of phosphorous additives to form a protective antiwear film.","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"95 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83351776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tribological Properties of Tin-Zinc Hybrid Coating on Bronze in Lubricated Condition","authors":"Minami Yamada, H. Usami","doi":"10.2474/trol.17.54","DOIUrl":"https://doi.org/10.2474/trol.17.54","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75643651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simulation method taking into account sequential changes of the tooth contact state due to the tooth surface wear was developed in order to evaluate the influence of wear on pitting durability. As a result of calculating the tooth end relief shape as a parameter, the variation in the wear propagation rate was obtained depending on the contact stress distribution. The study also obtained the nonlinear wear propagation property, in which the initial wear propagation was rapid and then changed gradually. In order to verify the wear characteristics, gear durability tests were conducted using gears with tooth tip modification and end relief, and sequential changes in the tooth surface wear state were observed. The test results revealed that the non-linear wear propagation property was obtained as in the calculation results. Wear propagation in the tooth lead direction and pitting life were able to be predicted. Using this calculation method and the experimental evaluation, it was made clear that the temporal alteration of contact stress and the non-linear propagation changed the pitting initiation timing and position, and may also have an effect on the pitting durability.
{"title":"Non-Linear Wear Propagation Property and Prediction Method Having Influencing Pitting Failure of Helical Gears","authors":"K. Kumagai, Hanlin Liu, Sérgio Kurokawa","doi":"10.2474/trol.17.44","DOIUrl":"https://doi.org/10.2474/trol.17.44","url":null,"abstract":"A simulation method taking into account sequential changes of the tooth contact state due to the tooth surface wear was developed in order to evaluate the influence of wear on pitting durability. As a result of calculating the tooth end relief shape as a parameter, the variation in the wear propagation rate was obtained depending on the contact stress distribution. The study also obtained the nonlinear wear propagation property, in which the initial wear propagation was rapid and then changed gradually. In order to verify the wear characteristics, gear durability tests were conducted using gears with tooth tip modification and end relief, and sequential changes in the tooth surface wear state were observed. The test results revealed that the non-linear wear propagation property was obtained as in the calculation results. Wear propagation in the tooth lead direction and pitting life were able to be predicted. Using this calculation method and the experimental evaluation, it was made clear that the temporal alteration of contact stress and the non-linear propagation changed the pitting initiation timing and position, and may also have an effect on the pitting durability.","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"122 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88030818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. C. Opia, Mohd Kameil Abdul Hamid, S. Syahrullail, Charles C. Johnson, S. Mamah, Audu Ibrahim Ali, Mazali Izhari Izmi, Che Daud Zul Hilmi, Muhammad Salman Khan, Abu Bakar Abd Rahim
{"title":"Effect of Surfactants on the Tribological Behavior of Organic Carbon Nanotubes Particles Additive under Boundary Lubrication Conditions","authors":"A. C. Opia, Mohd Kameil Abdul Hamid, S. Syahrullail, Charles C. Johnson, S. Mamah, Audu Ibrahim Ali, Mazali Izhari Izmi, Che Daud Zul Hilmi, Muhammad Salman Khan, Abu Bakar Abd Rahim","doi":"10.2474/trol.17.19","DOIUrl":"https://doi.org/10.2474/trol.17.19","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"147 suppl_2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90507430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effective Elastic Moduli of Magnetic Disks with Molecularly Thin Liquid Lubricant Films Determined Using Ar-Gas Cluster Ion Beam","authors":"H. Tani, Renguo Lu, S. Koganezawa, N. Tagawa","doi":"10.2474/trol.17.32","DOIUrl":"https://doi.org/10.2474/trol.17.32","url":null,"abstract":"","PeriodicalId":23314,"journal":{"name":"Tribology Online","volume":"134 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74695258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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