九州大学 研究者情報
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基本情報 研究活動 教育活動 社会活動
田中 宏昌(たなか ひろよし) データ更新日:2018.06.11

助教 /  工学研究院 機械工学部門 設計生体システム


主な研究テーマ
水素利用機器に用いられるOリングの摩擦摩耗特性
キーワード:水素,Oリング,ゴム,変形,損傷
2014.04~2018.03.
水素中におけるDLC膜の摩擦摩耗
キーワード:DLC, 水素,摩擦,摩耗
2012.05.
水素環境下における摩擦摩耗,及び転がり疲れの研究,高圧水素中における材料への水素侵入特性の評価
キーワード:すべり接触, 摩擦摩耗, 転がり接触, 疲労寿命, 高圧水素, 水素侵入特性, 表面分析
1989.04.
各種グリースの潤滑特性
キーワード:グリース,摩擦摩耗,転がり疲れ
2010.04.
従事しているプロジェクト研究
CREST:エネルギー高効率利用のための相界面科学
2015.05~2015.05, 代表者:足立幸志, 東北大学, 文部科学省
超低摩擦機械システムのためのトライボ化学反応を制御したナノ界面創成.
WPI international institute for carbon neutral energy research
2012.05, 代表者:Prof. Petros Sofronis.
U.S. Department of Energy, Wind and water power program
2010.11~2011.01, 代表者:Dr Ali Erdemir, Argonne National Laboratory, U.S., Department of Energy (U.S.)
発電用風車はアメリカにおいても次世代クリーンエネルギー技術の候補として注目されている.私がJPSP「組織的な若手研究者等
海外派遣プログラム」において訪問したアルゴンヌ国立研究所(米国,イリノイ州)においても200程度ある研究プロジェクトの一つにアメリカエネルギー省の助成によるWind Programがあり,私の研究もWind Programの一部である(1, 2).米国において私が実施した研究は,発電用風車システムにおける転がり要素の耐久性評価にかかわる研究であり,特に,風車に使用される歯車歯面におけるマイクロピッチング試験であった..
水素先端科学基礎研究事業
2008.07, 代表者:Joichi Sugimura, 九州大学, NEDO技術開発機構
水素について重要な科学的知見を集積して、水素を安全・簡便に利用するための指針を産業界に提供することにより、水素社会到来に向けた基盤整備を行うことを目的とする.
研究業績
主要原著論文
1. Hiroyoshi Tanaka, Effect of Environmental Gas on Surface Initiated Rolling Contact Fatigue, Tribology Online, 8, 1, 90-96, 2013.01, This paper describes an exploratory study on the effects of temperature on the formation of oxide film and rolling contact fatigue life in hydrogen, argon and air. Rolling contact fatigue tests were conducted at 333 K and 363 K by using a three-ball-on-disk type apparatus. The rolling contact fatigue life in hydrogen was shorter than that in argon, and life in air was the longest. Relationship was found between fatigue life and hydrogen concentration in steel. Cross sections of the specimens show that iron oxide grew to larger grain size in the subsurface in hydrogen environment, which may have resulted in shorter fatigue life. It was also found that fatigue failure occurs on ball surface in hydrogen at 363 K..
2. 田中宏昌,森田健敬,澤江義則,杉村 丈一, DLC膜に及ぼす40MPa水素ガス曝露の影響, トライボロジスト, 54, 12, 848-856, 2009.12.
主要学会発表等
1. 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..
2. 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.
3. 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..
4. 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..
5. 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..
6. 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..
7. 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..
8. 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.
9. 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.
.
10. 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.
11. 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..
12. 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..
13. 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..
14. 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.
15. 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.
16. 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.
17. 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.
特許出願・取得
特許出願件数  1件
特許登録件数  0件
学会活動
所属学会名
日本トライボロジー学会
日本機械学会
学協会役員等への就任
2015.05~2018.04, 日本機械学会設計工学システム部門, 広報委員.
2012.05~2015.05, トライボロジー学会, 編集委員,広報情報化委員.
学会大会・会議・シンポジウム等における役割
2018.04.12~2018.04.14, 日中トライボロジ先端フォーラム2018, 実行委員.
2016.09.11~2016.09.14, 機械学会年次大会, 座長(Chairmanship).
2015.05.27~2015.05.29, トライボロジー学会2015春姫路, 座長(Chairmanship).
2014.11.04~2014.11.06, トライボロジー会議2014秋盛岡, 座長(Chairmanship).
2013.03.13~2013.03.13, 機械学会九州支部第66期総会講演会, 座長(Chairmanship).
2012.09.16~2012.09.28, トライボロジー会議2012秋室蘭, 座長(Chairmanship).
2012.03.16~2012.03.16, 機械学会九州支部第65期総会講演会, 座長(Chairmanship).
2011.10.30~2011.11.03, International Tribology Conference, Hiroshima 2011, 座長(Chairmanship).
2011.05.23~2011.05.25, トライボロジー会議2011春東京, 座長(Chairmanship).
2010.05.17~2010.05.19, トライボロジー会議2010春東京, 座長(Chairmanship).
2009.10.10~2009.10.10, 機械学会九州支部四国九州支部合同企画長崎講演会, 座長(Chairmanship).
2007.09.26~2007.09.28, トライボロジー会議2007秋佐賀, 座長(Chairmanship).
学会誌・雑誌・著書の編集への参加状況
2013.04~2014.05, 雑誌トライボロジスト, 国内, 編集委員.
学術論文等の審査
年度 外国語雑誌査読論文数 日本語雑誌査読論文数 国際会議録査読論文数 国内会議録査読論文数 合計
2015年度    
2014年度 10      12 
2013年度 10      11 
2012年度      
2008年度      
その他の研究活動
海外渡航状況, 海外での教育研究歴
Argonne Natinal Laboratory, UnitedStatesofAmerica, , 2010.11~2011.01.
Brunel university, UnitedKingdom, 2009.04~2009.04.
受賞
2013年度第57期日本トライボロジー学会 論文賞, 一般社団法人日本トライボロジー学会, 2014.05.
International hydrogen energy development forum 2010 Distinguished Presentation Award, National Institute of Advanced Industrial Science and Technology - Recearch Center for Hydrogne Industrial Use and Strage (HYDROGENIUS), 2010.02.

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