Masanobu Kubota | Last modified date:2024.01.25 |
Professor /
Hydrogen Compatible Materials and Fracture (in Department of Mechanical Engineering, April 2014 - Current), Air Liquide Industrial Chair on Hydrogen Structural Materials and Fracture (in Department of Mechanical Engineering, Oct. 2010 - March 2014)
Advanced Energy Materials Thrust
International Institute for Carbon-Neutral Energy Research
Advanced Energy Materials Thrust
International Institute for Carbon-Neutral Energy Research
Graduate School
Undergraduate School
Other Organization
Administration Post
Other
Other
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Homepage
https://kyushu-u.elsevierpure.com/en/persons/masanobu-kubota
Reseacher Profiling Tool Kyushu University Pure
https://i2cner.kyushu-u.ac.jp/en/teams/materials/
Advanced Energy Materials Thrust, International Institute for Carbon-Neutral Energy (I2CNER), Kyushu University .
http://i2cner.kyushu-u.ac.jp/en/team/team_detail.php?code=2
Hydrogen Materials Compatibility Division, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University .
Phone
092-802-6720
Academic Degree
Dr. Eng
Country of degree conferring institution (Overseas)
No
Field of Specialization
Strength of engineering materials, Metal fatigue, Fretting fatigue, Hydrogen structural materials
Total Priod of education and research career in the foreign country
00years00months
Outline Activities
I study strength of materials for energy and low-carbon society by experimental approach with many international and interdisciplinary collaborations previously at Hydrogen Materials Compatibility Research Division (until March 2020) and currently Advanced Energy Materials Thrust (from April 2020 - Present), International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University. At the same time, I belong Research Center for Hydrogen Industrial Use and Storage (HYDROGENIUS) as a professor. There, I study fatigue limit in high-pressure hydrogen. Also, I am working at Department of Mechanical Engineering, Kyushu University as a professor. Thanks to the support by Department of Mechanical Engineering, I open a laboratory "Hydrogen Materials Compatibility and Fracture" in the department. I am glad to have time with the students at Department of Mechanical Engineering.
Education: I am (was) in charge of Academic frontier for all undergraduate students, Advanced engineering for international course students, Mechanical engineering experiment for 3rd grade student in Mechanical Engineering course, and Hydrogen energy structural materials for master course students mainly in Mechanical Engineering. Regarding education of student, my goal is as follows. Students can find their own interest in their research. Then, students can pursue science by their original idea and creativity. In my laboratory, the students need to learn computer programing, electric circuit, machining, design and drawing, presentation etc. in addition to strength of materials. For the improvement of my teaching skills, I attend faculty development courses and join Society for Engineering Education, Japan.
Research: Hydrogen embrittlement, which is degradation of material strength due to hydrogen, is the major research interest. Particularly, I put effort into the study on the effect of impurities contained in hydrogen gas on hydrogen embrittlement, degradation of materials strength in high-temperature hydrogen gas. Also, fretting fatigue is one of main research themes. For the study of material strength in the presence of hydrogen, I try to facilitate fusion of the researchers at different fields such as chemistry and thermodynamics. Also, I try to promote fusion of the researchers using different approach such as experiment, modeling and computation. I put emphasis on technology transfer.
(1) Effect of hydrogen on fretting fatigue, fatigue and fracture toughness: To achieve optimization of cost and performance of high-pressure hydrogen containment systems without compromising safety, these studies are being carried out.
(2) Fatigue limit in high-pressure hydrogen gas: We developed a special fatigue testing machine to obtain fatigue limit in high-pressure hydrogen. We are only institute capable for this experiment worldwide.
(3) Degradation of material strength in high-temperature hydrogen: It can be expected that SOFC and SOEC will be extensively used in the near future. These energy and material interconversion devices operate in hydrogen at elevated temperature. Material strength in this extremely aggressive environment should be studied for the safety of those advanced hydrogen technologies.
(4) Fretting fatigue: Fretting fatigue is one of the major factors in the design of machines and structure to prevent catastrophic failure accidents. Mechanism and the method how to evaluate quantitatively are studying with a company.
Social contribution: Chief secretary of Kyushu Branch, The Japan Society of Mechanical Engineers (2021.3 - Present), Steering committee of Kyushu branch of the Japan Society of Materials Science (2008-2015), Editorial committee of journal of Japan Society for Mechanical Engineers (2009-2010), Referee of contributed paper to JSME journal (domestic and international), International symposium (MMYoung and ISFF), Workshops, Board member of the Japan Society of Materials Science (2016-2019)
Technical Program Committee of International Hydrogen Conference 2022 (IHC2022), International cooperation: Local committee (Asia region) of International symposium on fretting fatigue (ISFF 6 - ISFF 10), Planning committee of international symposium for young researchers (M&M div, JSME), ASMP208, VHF-9 and so on.
Education: I am (was) in charge of Academic frontier for all undergraduate students, Advanced engineering for international course students, Mechanical engineering experiment for 3rd grade student in Mechanical Engineering course, and Hydrogen energy structural materials for master course students mainly in Mechanical Engineering. Regarding education of student, my goal is as follows. Students can find their own interest in their research. Then, students can pursue science by their original idea and creativity. In my laboratory, the students need to learn computer programing, electric circuit, machining, design and drawing, presentation etc. in addition to strength of materials. For the improvement of my teaching skills, I attend faculty development courses and join Society for Engineering Education, Japan.
Research: Hydrogen embrittlement, which is degradation of material strength due to hydrogen, is the major research interest. Particularly, I put effort into the study on the effect of impurities contained in hydrogen gas on hydrogen embrittlement, degradation of materials strength in high-temperature hydrogen gas. Also, fretting fatigue is one of main research themes. For the study of material strength in the presence of hydrogen, I try to facilitate fusion of the researchers at different fields such as chemistry and thermodynamics. Also, I try to promote fusion of the researchers using different approach such as experiment, modeling and computation. I put emphasis on technology transfer.
(1) Effect of hydrogen on fretting fatigue, fatigue and fracture toughness: To achieve optimization of cost and performance of high-pressure hydrogen containment systems without compromising safety, these studies are being carried out.
(2) Fatigue limit in high-pressure hydrogen gas: We developed a special fatigue testing machine to obtain fatigue limit in high-pressure hydrogen. We are only institute capable for this experiment worldwide.
(3) Degradation of material strength in high-temperature hydrogen: It can be expected that SOFC and SOEC will be extensively used in the near future. These energy and material interconversion devices operate in hydrogen at elevated temperature. Material strength in this extremely aggressive environment should be studied for the safety of those advanced hydrogen technologies.
(4) Fretting fatigue: Fretting fatigue is one of the major factors in the design of machines and structure to prevent catastrophic failure accidents. Mechanism and the method how to evaluate quantitatively are studying with a company.
Social contribution: Chief secretary of Kyushu Branch, The Japan Society of Mechanical Engineers (2021.3 - Present), Steering committee of Kyushu branch of the Japan Society of Materials Science (2008-2015), Editorial committee of journal of Japan Society for Mechanical Engineers (2009-2010), Referee of contributed paper to JSME journal (domestic and international), International symposium (MMYoung and ISFF), Workshops, Board member of the Japan Society of Materials Science (2016-2019)
Technical Program Committee of International Hydrogen Conference 2022 (IHC2022), International cooperation: Local committee (Asia region) of International symposium on fretting fatigue (ISFF 6 - ISFF 10), Planning committee of international symposium for young researchers (M&M div, JSME), ASMP208, VHF-9 and so on.
Research
Research Interests
Awards
- Activation of metallic catalyst by friction
keyword : Catalyst Carbon monoxide Carbon dioxide Hydrogen Decomposition
2020.04. - Inhibitory effect on hydrogen-assisted degradation of material strength
keyword : Hydrogen, Fracture, Fatigue, Fretting, Fracture toughness, Impurity
2014.04. - Degradation of material strength in hydrogen at elevated temperature
keyword : Hydrogen, High temperature, Creep, Fatigue
2017.04. - Fatigue limit in high-pressure hydrogen
keyword : Hydrogen, Fatigue Limit
2014.04. - study on propagation behavior of small crack in railway wheel materials
keyword : Small crack, Crack propagation, Threshold, Railway
2010.04. - Development of weld joint for high-pressure hydrogen piping
keyword : Hydrogen, Welding technique
2014.04~2017.03. - Effect of hydrogen on fracture toughness
keyword : Hydrogen Fracture toughness
2010.10~2013.09. - Evaluation of fretting fatigue strength of mechanical component received torsion
keyword : Fretting fatigue, Torsion, Spline, Press Fit
2008.04Evaluation and improvement of fretting fatigue strength in machine component applied cyclic torsion. - Elucidation of mechanism of fretting fatigue strength reduction due to hydrogen
keyword : Hydrogen, Fretting Fatigue, Mechanism, Reduction of Fretting Fatigue strength, Adhesion, Small cracks
2007.04Mechanism elucidation of fretting fatigue strength reduction due to hydrogen gas: Fretting fatigue strength decreases in hydrogen gas environment. To clarify the mechanisms, elaborate observations of fretted surface and crack propagation behavior are doing. . - Effect of hydrogen gas and absorbed hydrogen on fretting fatigue strength
keyword : Hydrogen gas, Hydrogen concentration, Fretting fatigue strength
2003.04The objective of this study is to clarify the effect of hydrogen gas on fretting fatigue strength of the materials used for hydrogen utilization machines and structures. In hydrogen gas environment, fretting fatigue strengths of A286, SUS304 and SUS316L decrease in the long-life region.. - Study on fretting fatigue in oil-well pipe materials
keyword : Fretting, Fretting fatigue, Oil-well pipe, Coating, Lubrication
2016.04. - Selection of shape and size of stress-relief groove for improvement of fretting fatigue strenth
keyword : Fretting fatigue, Stress-relief groove, Improvement of fretting fatigue strength
2005.04Stress relief groove has been used to improve the fretting fatigue strength of fitted part between mechanical components. However, the applicability of groove has not been fully evaluated and there are insufficient investigations to determine the optimal groove shape. In this study, the evaluation of fretting fatigue strength of specimens which have various shapes of stress relief groove was conducted by fretting fatigue tests and FEM analyses in order to develop an index for the selection of groove shape..
- Establishment of more solid partnership between Norway and Japan through education of PhD students and brain circulation of researchers based on study of hydrogen embrittlement.
- Education of PhD students are promoted through international collaboration on the research of hydrogen embrittlement.
- Effect of hydrogen on creep properties and mechanism that hydrogen accelerate creep deformation are studied.
- Introduction of nitrogen stainless steel and its weld joint is required for high-pressure hydrogen piping. Nitrogen is important alloying element to improve strength and hydrogen compatibility, however, the state of existence may be changed during welding process. This study is aiming at development of weld joint of nitrogen stainless steel which is applicable for high-pressure hydrogen piping. ①Development of welding technique, ②Characterization of microstructure, ③Study on hydrogen compatibility of developed weld joint.
- ・Study on hydrogen compatibility of engineering steels and alloys
・Study on hydrogen compatibility of specific materials to expand allowable pressure range and temperature range
・Provision of hydrogen materials data sheets - To secure sustainable development of humankind, early realization of low-carbon economy and hydrogen society is necessary. Development of wide range of technologies is indispensable.
- Comprehensive tie-up between Kyushu University and Hitachi Ltd. Investigations of fatigue strength under high-pressurized hydrogen environment
- Development of fatigue strength design method for hydrogen utilization machines
- Development for safe utilization and infrastructure of hydrogen project
- Integration Technology of Mechanical System for Hydrogen Utilization
Reports
1. | Contact Mechanics and Evaluation of Fretting Fatigue Strength. |
2. | Contact Mechanics and Evaluation of Fretting Fatigue Strength. |
Papers
Presentations
- Development of environmental-friendly and energy-saving car air-conditioning compressor using downsized power transmission shaft by hybrid joint structure
- Mechanism of Reduction of Fretting Fatigue Limit in Hydrogen Gas in SUS304
- Award for the Best Paper 2007, Japan Society of Materials Science
Effect of stress relief groove shape on fretting fatigue strength and index for the selection of groove shape - Studies on effect of influence factors on fretting fatigue and quantitative evaluation of fretting fatigue strength
Educational
Educational Activities
I consider research plans for students by fully utilizing superb international and interdisciplinary research environment of I2CNER such that the students can play a primary role in international arena in their future. I provide research guidance for doctor, master and undergraduate students. I provide students many opportunities of communication with abroad researchers, researchers at domestic and international companies, debate in English in order to develop broad perspectives. Students need many skills and knowledge of design & drawing, machining, experiment, observation, programming, control of devices, presentation and so on.
A lecture of hydrogen energy structural materials is opened for master course's students. I provide students basic knowledge and information about advanced studies related to the effect of hydrogen on strength of metal materials. I have an experiment for 3rd grade students. The subject is torsion test of mild steel and cast iron. This experiment is important to enhance understanding of classroom lectures such as strength of materials, elastic mechanics and engineering materials. For bachelor students, Advanced Engineering (English) and Academic Frontier (Japanese) are opened. Importance of use of hydrogen energy and materials issues for hydrogen utilization technology are introduced.
Math and linear algebra were held in Kyushu Politechnique College until 2006. A lot of examples related with engineering problems are included in order to build up interest.
As an extensive education activity, I have been served several workshops and seminars concerning fretting fatigue, fatigue and hydrogen-materials interactions. Most of the participants are from manufacturing companies. Based on these activities, I have a lot of collaboration with industry.
A lecture of hydrogen energy structural materials is opened for master course's students. I provide students basic knowledge and information about advanced studies related to the effect of hydrogen on strength of metal materials. I have an experiment for 3rd grade students. The subject is torsion test of mild steel and cast iron. This experiment is important to enhance understanding of classroom lectures such as strength of materials, elastic mechanics and engineering materials. For bachelor students, Advanced Engineering (English) and Academic Frontier (Japanese) are opened. Importance of use of hydrogen energy and materials issues for hydrogen utilization technology are introduced.
Math and linear algebra were held in Kyushu Politechnique College until 2006. A lot of examples related with engineering problems are included in order to build up interest.
As an extensive education activity, I have been served several workshops and seminars concerning fretting fatigue, fatigue and hydrogen-materials interactions. Most of the participants are from manufacturing companies. Based on these activities, I have a lot of collaboration with industry.
Social
Professional and Outreach Activities
Many collaborations with industry in terms of analysis and prevention of failure caused by fatigue, fretting fatigue and hydrogen embrittlement were done. Usually failure accident is hidden by the sense of company secret, but in two cases, publications in scientific journal were made. The results of my research were taken into account in some lawsuits as an expert opinion.
For the contribution to regional industry, some collaborative researches were done with small companies in Kyushu area.
I believe that development of real products is the highest goal of our study (Technology transfer). It is very important in terms of relevance of studies.
I served as a board member, journal editors committee, reviewer, managing committee in academic societies. I try to do my best to further development of academic societies.
I held many seminars for citizens, high-school students and engineers in order to educate importance of fatigue, fretting fatigue and hydrogen embrittlement.
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For the contribution to regional industry, some collaborative researches were done with small companies in Kyushu area.
I believe that development of real products is the highest goal of our study (Technology transfer). It is very important in terms of relevance of studies.
I served as a board member, journal editors committee, reviewer, managing committee in academic societies. I try to do my best to further development of academic societies.
I held many seminars for citizens, high-school students and engineers in order to educate importance of fatigue, fretting fatigue and hydrogen embrittlement.
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