九州大学 研究者情報
発表一覧
田中 宏昌(たなか ひろよし) データ更新日:2023.11.22

助教 /  工学研究院 機械工学部門 設計生体システム


学会発表等
1. Hiroyoshi Tanaka, Joichi Sugimura, Effects of Transition Metals on Low Friction of DLC Coatings, 2021 Hydrogenius and I2Cner Tribology Symposium, 2021.01.
2. 田中 宏昌, Effects of transition metals on low friction of DLC coatings, 2019 ITC sendai, Miyagi Japan, 2019.09, In this study, two transient metals, Titanium and Chromium, are selected and doped to the DLC coating. Sliding tests are conducted to see how the transient metals gives rise to low friction and wear..
3. 田中 宏昌, Effect of molecular structure of synthetic oils on decomposition and hydrogen generation in rolling contact, 2018 Tribology Frontiers Conference, Chicago Illinois , 2018.10, This study describes effects of additives on hydrogen permeation into bearing steel under rolling contact. Rolling contact tests were conducted under oil lubrication in hydrogen. PAO, POE, PPG were used as lubricants..
4. 田中 宏昌, 眞鍋 佳資, 杉村丈一, DLC膜と純金属の摩擦耗に及ぼす酸素水分影響
Effects of Oxygen and Water on Friction Wear DLC against Pure Metals, トライボロジー会議2017秋高松, 2017.11.
5. 田中 宏昌, Permeation of hydrogen into steel under rolling contact in various gas with additive free oils, Tribology frontier 2016, 2016.11, This study describes effects of additives on hydrogen permeation into bearing steel under rolling contact. Rolling contact tests were conducted under oil lubrication in hydrogen. PAO, POE, PPG were used as lubricants..
6. 田中 宏昌, Effects of lubricant additives on hydrogen permeation under rolling contact, Tribology frontier 2015, 2015.10, This study describes effects of additives on hydrogen permeation into bearing steel under rolling contact. Rolling contact tests were conducted under oil lubrication in hydrogen. WS2 nanoparticles, TOP, DBDS, ZDDP and MoDTC were used as lubricant additive.
7. 田中 宏昌, Hydrogen Permeation through Oxide Layer on Steels, ITC2015, 2015.09, This paper describes the surface film formation and hydrogen permeation on steel surface under hydrogen environment. Sliding tests of bearing steel AISI52100 and stainless steel AISI440C are conducted in hydrogen and vacuum with oil lubrication..
8. 田中 宏昌, Joichi Sugimura, Suguru Ikeda, Different failure modes in rolling contact of steel under grease lubrication, STLE tribology frontier 2014, 2014.10, Rolling contact fatigue test under grease lubrication is conducted for the purpose of clarifying effect of surrounding gas on rolling contact fatigue life. The influence of temperature, atmosphere, and grease types is investigated through surface analysis, hydrogen diffused in steel, the composition of surface film and the characteristics of lubrication state. The bearing life depended on environment and lubricant, and surface failure was classified into three types in terms of surface roughness and temperature change. At higher temperature, there is a tendency that roughness becomes smaller and bearing life is extended..
9. 田中 宏昌, Joichi Sugimura, Taiki komatsu, Effects of environmental gas on decomposition of lubricant and hydrogen generation at nascent iron surface, Asiatrib2014, 2014.02, Lubricated sliding tests of iron were made in a temperature controlled chamber, and the amount of hydrogen generated was determined with gas chromatography. The lubricants used included polyalphaolephine polyorester, polypropyrenglycol and dimethyl silicone oil. It was found that the amount of hydrogen generated is significantly larger when nascent surface is continuously created than under static non-sliding conditions. It was also found that hydrogen generation is retarded when the environment gas contains more oxygen. Among the oils tested, the silicone oil showed very low hydrogen generation under non-sliding condition while it generates much greater amount of hydrogen than other lubricants..
10. 田中 宏昌, EFFECTS OF HYDROGEN ON STRUCTURAL CHANGE AND ROLLING CONTACT FATIGUE OF STEEL, Asiatrib2014, 2014.02, This paper describes experimental study of rolling contact fatigue under various conditions. Ball-on-disk type rolling contact fatigue tests were conducted in hydrogen and other gasses. Some of the specimens contained extra amount of hydrogen by the pre-treatment of hydrogen exposure prior to the tests. After the rolling contact fatigue test, hydrogen content measurement with thermal desorption spectroscopy, cross section observations with SEM(Scanning electron microscope) and EsB (Energy selective back-scatter) detector were conducted..
11. 田中 宏昌, Rolling contact fatigue test with greases in hydrogen environment, WTC2013, 2013.09, This paper describes a study on grease lubrication of rolling element bearing under hydrogen environment. Rolling contact fatigue tests were conducted with greases under hydrogen and other gas environments. In order to find influences of hydrogen on several greases, relationship between RCF life and permeation of hydrogen and/or surface condition are focused on..
12. 田中 宏昌, PERMEATION OF HYDROGEN INTO STEEL IN SIMPLE CYCLIC CONTACT TESTS, ISFF7, 2013.04, This paper describes permeation of hydrogen under simple mechanical motion at tribo-interface. It has been believed that hydrogen plays an important role in degrading mechanical properties of ferrous materials in rolling contact. It is necessary to study each of the effects of elementary processes at contact and slip on hydrogen permeation into steel. An experimental apparatus was used which enabled a variety of simple contact tests with cyclic normal loading and reciprocating sliding for each in controlled environment.
13. Hiroyoshi Tanaka, Rolling Contact Fatigue under Grease Lubrication in Hydrogen, IJTC2012, 2012.10, In order to investigate the effects of greases on rolling contact fatigue life in hydrogen, we will focus on how surface film formation
Wettability or polarity of base oil, thickener of grease affects the surface initiated and/or subsurface initiated rolling contact fatigue.
.
14. 田中宏昌, 鋼表面における酸化膜形成と水素侵入, 日本トライボロジー学会 第81回メンテナンス・トライボロジー研究会, 2012.02.
15. Takahiro Yamanaka, Hiroyoshi Tanaka, Kazuyuki Yagi, Joichi Sugimuura, Fluid Flow between Parallel Sliding Surfaces with Rectangular Microdimples, International Tribology Conference, Hiroshima 2011, 2011.11, Surface micro-texturing has recently attracted considerable attention for its capability to improve lubrication. The roles of the textures in the form of dimples and grooves are roughly threefold; to improve hydrodynamic lubrication to provide lower friction or higher load capacity, to act as oil reservoirs to provide oil supply, and to collect wear debris from contact area to minimize subsequent wear caused by the debris. Although everyone may know them, it appears that the mechanisms for these functions are not fully understood. This study focuses on the second function, the fluid supply to thin lubricating film with textured surfaces. Following the previous experiments on regularly arranged circular microdimples, rectangular microdimples with different orientations are studied..
16. Hiroyoshi Tanaka, Tatsuhiko Morofuji, Masaaki Hashimoto, Joichi Sugimura, Effect of Temperature on Surface Initiated Rolling Contact Fatigue in Hydrogen Environment, International Tribology Conference, Hiroshima 2011, 2011.11, It is widely recognized that hydrogen atoms adsorbed at steel surface permeate into the steel in rolling contact resulting in reduction of rolling contact fatigue life. Oxide film on steel surface may influence the permeation properties of hydrogen. However, how surface film prevents or promotes hydrogen permeation is yet to be studied for the purpose of finding an effective way to prevent hydrogen permeation and early occurrence of flaking failure. This paper describes a study to explore the effects of temperature on formation of oxide film and fatigue life in hydrogen, argon and air. Rolling contact fatigue tests in fully flooded conditions are conducted by using a three-ball-on-disk type apparatus at 333 K and 363 K..
17. Hiroyoshi Tanaka, Yoshinori Sawae, Joichi Sugimura , Surface film formation and hydrogen permeation of austenitic stainless steel under high pressure hydrogen, ASME/STLE 2011 International Joint Tribology Conference, IJTC2011, 2011.10, This paper describes the surface film formation and hydrogen permeation of stainless steel under high pressure hydrogen. In order to see the hydrogen permeation property of stainless steels, exposure test into high pressure hydrogen were demonstrated using stainless steel AISI Type 440C, 316 and 316L disks specimens. To investigate the content of hydrogen in the specimens and characteristics of surface oxide layer, desorption spectra of hydrogen and water by TDS were acquired. Meanwhile, XPS analyses were performed to identify chemical composition of the exposed surface. These results suggested that the permeation property of hydrogen through the steel surface related to the desorption behavior of moisture, which may be caused by the surface film formed during the exposure to high pressure and/or desorption process during TDS..
18. Joichi Sugimura, Hiroyoshi Tanaka, Hiraku Tanimoto, Takefumi Otsu, Masaaki Hashimoto,, Oxidation of steel surface under repeated contact in hydrogen2011.09.08., 38th Leeds-Lyon Symposium on Tribology, 2011.09.
19. Hiroyoshi Tanaka, Nobuo Sakai, Yoshinori Sawae, Joichi Sugimura, Effects of High Pressure Hydrogen Gas on Surface Properties of Steels, 2011 Hydrogenius Tribology Symposium, International Hydrogen Energy Development Forum 2011, 2011.02.
20. Hiroyoshi Tanaka, Nobuo Sakai, Yoshinori Sawae, Joichi Sugimura, Effects of High Pressure Hydrogen Gas on Surface Properties of Steels, 2011 Hydrogenius Tribology Symposium, International Hydrogen Energy Development Forum 2011, 2011.02.
21. 田中宏昌, 水素ガス雰囲気中の転がり疲れ, 明治大学学術フロンティア第4回シンポジウム2010-03-05, 2010.03.
22. Hiroyoshi Tanaka, Takehiro Morita, Yoshinori Sawae, Joichi Sugimura, Effects of exposure to high pressure hydrogen on DLC films, International hydrogen energy development forum 2010, 2010.02.
23. Hiroyoshi Tanaka, Naoshi Izumi, Joichi Sugimura, Sliding friction and wear of DLC coating films in hydrogen environment, WTC2009, 2009.09.
24. Hiroyoshi Tanaka, Joichi Sugimura, Sliding experiments in hydrogen and surface analysis of DLC coating films, ECOTRIB2009, 2009.06.
25. Hiroyoshi Tanaka, Sliding friction and wear of DLC coating films in hydrogen environment , International hydrogen energy development forum 2009, 2009.02.
26. Hiroyoshi Tanaka, Friction test and analysis system with transfer vessel, International hydrogen energy development forum 2008 , 2008.02.
27. Hiroyoshi TANAKA , Takahiro YAMAMOTO, Yuji YAMAMOTO, Joichi SUGIMURA, Rolling contact fatigue life under pure rolling in hydrogen environment, 34th Leeds-Lyon symposium on Tribology, 2007.09.
28. Hiroyoshi Tanaka*, Masaaki Hashimoto, Joichi Sugimura and Yuji Yamamoto, ROLLING CONTACT FATIGUE OF SOME BEARING STEELS IN HYDROGEN ENVIRONMENT, ASIATRIB 2006 KANAZAWA, 2006.10.
29. Hiroyoshi Tanaka*, Joichi Sugimura,Takahiro Nakahigashi and Masanori Tsujioka, FRICTIONAL PROPERTIES OF DLC COATING FILM UNDER HYDROGEN ENVIRONMENT, ASIATRIB 2006 KANAZAWA, 2006.10.
30. H. Tanaka, M. Hashimoto, J. Sugimura, Y. Yamamoto,, Rolling contact fatigue of bearing steel in hydrogen environment, WTC2005, 2005.09.
31. H. Tanaka, Y. Yamamoto, B. Ono, Effects of content of Mo in Fe alloy on formation of MoS2 surface film at sliding contact, International Tribology Conference Kobe, 2005.06.

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