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Affiliation |
Faculty of Engineering, Division of Systems Research |
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Job Title |
Professor |
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Research Fields, Keywords |
極低温特性, Microstructure of Metals and Alloys, Fracture, 疲労, Deformation |
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Mail Address |
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Related SDGs |
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UMEZAWA Osamu
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ORCID
The Best Research Achievement in Research Career 【 display / non-display 】
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【Published Thesis】 Cyclic deformation, dislocation structure and internal fatigue crack generation in Ti-Fe-O alloy at liquid nitrogen temperature 2000.11
【Published Thesis】 Effects of partial recrystallization on high-cycle fatigue deformation and crack generation of a nitrogen-strengthened 32Mn-7Cr austenitic steel at liquid nitrogen temperature 2004.02
【Published Thesis】 A modeling approach to evaluate grain interaction induced by {111}<1-10> planar slips in face centered cubic polycrystalline materials 2012.06
The Best Research Achievement in the last 5 years 【 display / non-display 】
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【Published Thesis】 Influence of microstructure constituents on ductile to brittle transition behavior in multi-phase steel sheets 2021.03
【Published Thesis】 Equiaxed α microstructure evolution in wrought Ti-10Al-1Zr-1Mo-1Nb alloy during annealing 2021.02
【Published Thesis】 Fractographical analyses of crack initiation site in high-cycle fatigue for Ti-Fe-O alloy at low temperature 2018.07
【Published Thesis】 Analysis of subsurface fatigue crack generation in Ti-Fe-O alloy at low temperature 2018.02
【Published Thesis】 Crystallographic characterization of the middle shelf in a two-step ductile to brittle transition for a ferrite + pearlite structure steel sheet 2018.02
Education 【 display / non-display 】
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-1986.3
Waseda University Metallurgical Engineering Graduated
Degree 【 display / non-display 】
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Doctor of Engineering - Waseda University
Campus Career 【 display / non-display 】
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2017.4
Duty Yokohama National UniversityFaculty of Engineering Division of Systems Research Professor
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2006.4-2017.3
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Professor
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2001.11-2006.3
Duty Yokohama National UniversityFaculty of Engineering Division of Systems Research Associate Professor
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2019.4
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Center for Creation of Symbiosis Society with Risk Professor
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2019.4-2023.3
Concurrently Yokohama National UniversityFaculty of Engineering Dean
External Career 【 display / non-display 】
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2019.1-2023.12
Vysoká Škola Báňská - Technical University of Ostrava Senior researcher
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2001.4-2001.10
National Institute for Materials Science Senior Researcher
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1996.4-2001.3
National Institute for Metals, Sience and Technology Agency Senior Researcher
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1993.10-1995.3
University of Cambridge Department of Materials Science and Metallurgy Visiting Fellow
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1993.10-1995.3
Japan Research and Development Corporation Researcher
Academic Society Affiliations 【 display / non-display 】
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2008.6
日本熱処理技術協会
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2001.12
Ecomaterials Forum
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1998.7
Japan Institute for Light Metals
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1986.1
Japan Institute for Metals
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1986.1
The Iron and Steel Institute of Japan
Research Areas 【 display / non-display 】
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Nanotechnology/Materials / Structural materials and functional materials
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Nanotechnology/Materials / Material processing and microstructure control
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials
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Environmental Science/Agriculture Science / Environmental load reduction and remediation
Research Career 【 display / non-display 】
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Deformation and Fracture of Steels
Project Year：
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Deformation and Farcture of Titanium Alloys
Grant-in-Aid for Scientific Research
Project Year：
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Process and Materials Design in alloys
The Other Research Programs
Project Year：
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表面硬化部材の疲労き裂形成
Project Year：
Books 【 display / non-display 】
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金属組織観察のための検鏡試料の作り方
梅澤修（ Role： Supervisor (editorial)）
大河出版 （ ISBN:978-4-88661-818-4 ）
Language：Japanese Book type：Scholarly book
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Handbook of Ecomaterials
Yoshikazu Shinohara and Osamu Umezawa（ Role： Contributor）
Springer International Publishing （ ISBN:978-3-319-68254-9 ）
Responsible for pages：961-966 Language：English Book type：Scholarly book
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Handbook of Ecomaterials
Osamu Umezawa, Yoshikazu Shinohara, and Kohmei Halada（ Role： Contributor）
Springer International Publishing （ ISBN:978-3-319-68255-6 ）
Responsible for pages：2261-2280 Language：English Book type：Scholarly book
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Standard Microstructures Group 1: Carbon steel & cast irons
Materials Technology Education Association（ Role： Supervisor (editorial)）
Yamamoto Scientific Tool Laboratory
Language：English Book type：Scholarly book
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改訂版 金属組織の現出と試料作製の基本
材料技術教育研究会 (編集) （ Role： Contributor , 全編の編集と校正、および11章のEBSD分析および三次元化に必要な試料調整ついて解説した。）
大河出版 （ ISBN:9784886618177 ）
Total pages：303 Language：Japanese Book type：Scholarly book
編集代表者として全体の取りまとめと、11章「機器分析用研磨面作成の留意点」の11.4節「SEM-EBSD解析のための試料作製について」と11.5節「シリアルセクショニング法による三次元画像再構築」pp.285-290を分担執筆した。
Thesis for a degree 【 display / non-display 】
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高強度非磁性金属材料の極低温高サイクル疲労破壊の研究
梅澤 修
1992.10
Doctoral Thesis Single Work [Reviewed]
早稲田大学大学院理工学研究科 第1835号, 文部省 乙第901号
高強度非磁性金属材料であるチタン合金とオーステナイト鋼の高サイクル疲労をはじめとした極低温特性を評価するとともに、極低温高サイクル疲労破壊において顕在化する内部き裂発生に着目し、電子顕微鏡を用いて転位組織の発達と微小き裂および破面形成過程を詳細に解析し、高強度材料における不均一変形と組織依存によるき裂形成の基本的なモデルを提示した。
Papers 【 display / non-display 】
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Osamu Umezawa, Weibo Li
ISIJ International 62 ( 3 ) 2022.3 [Reviewed]
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 日本鉄鋼協会 Joint Work
<p>Subsurface microcracks developed in a groove-rolled and cold-swaged Ti–Fe–O alloy were characterized to clarify the generation of subsurface fatigue crack. In addition, the effects of crystallographic texture on subsurface crack initiation and growth were discussed. A considerable number of microcracks were detected in the <i>β</i> grains, <i>α</i> grains, and at the <i>α</i>-<i>β</i> interface. The microcracks in the <i>β</i> grains grew negligibly into the neighboring <i>α</i> grains along the basal plane. This was because these grains were oriented with their c-axis almost perpendicular to the loading axis. The {10 <span style="text-decoration: overline;">1</span>0}<sub><i>α</i></sub> fiber texture prevents the formation of basal facet and its growth on the basal plane. The stress concentration around the microcrack in the <i>β</i> grains could assist the growth of the microcrack into neighboring <i>α</i> grains along the prismatic plane (which is inclined to the loading axis at a suitable angle) or occasionally at a {10 <span style="text-decoration: overline;">1</span>0}<sub><i>α</i></sub> twist boundary. The {10 <span style="text-decoration: overline;">1</span>0}<sub><i>α</i></sub> fiber texture assisted microcrack growth, and thereby, formed aligned facets and yield longer microcrack length. The combination of the shear stress and opening stress on {10 <span style="text-decoration: overline;">1</span>0}<sub><i>α</i></sub> results in a Mode II or III microcrack and causes microcrack growth on the prismatic plane in the neighboring grain.</p>
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Visualization of strain distribution around fatigue crack introduced by low-cycle fatigue test in high-strength steels using digital image correlation method for replica films
Norimitsu Koga, Yuta Sakamaki, Akihiro Kaseya, Osamu Umezawa, Hiroshi Nakata, Shunsuke Toyoda
Materials Characterization 185 111731 2022.3 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Crystal plasticity analysis of temperature-sensitive dwell fatigue in Ti-6Al-4V titanium alloy for an aero-engine fan disc
Liangwei Yin, Osamu Umezawa
International Journal of Fatigue 156 ( 3 ) 106688 2022.3 [Reviewed]
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
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The preferential dynamic grain growth mechanism enabling the control of microstructure and texture by high temperature deformation: experimental evidence and applicability
Hiroshi Fukutomi, Kazuto Okayasu, Yusuke Onuki, Makoto Hasegawa, Equo Kobayashi, Bohumir Strnadel, … Show more authors
Hiroshi Fukutomi, Kazuto Okayasu, Yusuke Onuki, Makoto Hasegawa, Equo Kobayashi, Bohumir Strnadel, Osamu Umezawa Hide authors
Materials Transactions 63 ( 2 ) 148 - 156 2022.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Rolling and Sliding Contact Fatigue Process under High Pressure in Carburized SCM420 Steel
Hashimoto Kazuya, Fuchigami Taichi, Yari Keisuke, Umezawa Osamu
Tetsu-to-Hagane 108 ( 1 ) 76 - 87 2022.1 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Iron and Steel Institute of Japan Joint Work
<p>It is important to improve fatigue life for pitting of gear in order to attempt down-sizing of gear unit and low fuel consumption. Rolling and sliding contact fatigue under high pressure in carburized SCM420 steel is studied. The ultimate aim is to understand the effect of material properties on the fatigue life. In this research, there was considerable interest in change of the material in the contact surface of specimens depending on the shift in tangential force acting on a moving roller in the direction of a tangent to the path of the roller during the fatigue test. Three lubricants were used in these fatigue tests for the purpose of changing the degree of tangential force. A roller tested under a lubricant that the tangential force is shifted higher compared with that of the other lubricant produced a pitting failure earlier. The roller also promoted to decrease the hardness and to narrow the half width of the (211) peak of alpha iron at the contact surface. The transition of these characteristics related to the creation of fine grain layer. That is regarded as worked structure formed during fatigue process. The depth of fine grain layer expands according to repeated loading. Fatigue crack propagation depth was almost equal to the depth of fine grain layer. Not only well-known softening caused by increase in temperature but also microstructural change caused by repeated stress loading have an effect on the life through the involvement in fatigue crack initiation and propagation behavior.</p>
Review Papers 【 display / non-display 】
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高強度合金における高サイクル疲労き裂の形成とひずみ不整合との関わり
梅澤修
山陽特殊製鋼技報 28 ( 1 ) 3 - 12 2021.6 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other) Single Work
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Review of the mechanical properties of high-strength alloys at cryogenic temperatures
Osamu Umezawa
Materials Performance and Characterization 10 ( 2 ) 3 - 15 2021.3 [Reviewed] [Invited]
Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
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鉄鋼の熱処理組織と相変態
梅澤修
ぷらすとす 4 ( 38 ) 65 - 69 2021.2 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
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鉄鋼材料の熱処理で出現する組織：その歴史を振り返る
梅澤 修, 守谷英明
熱処理 58 ( 6 ) 294 - 300 2018.12 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Joint Work
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鉄鋼材料の疲労特性と熱処理
梅澤 修
MECHANICAL SURFACE TECH 43 38 - 40 2018.4
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Single Work
Industrial Property Rights 【 display / non-display 】
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チタン合金およびチタンからなる基体とその表面処理方法
梅澤 修
Applicant：横浜国立大学
Application no：2011-215240 Date applied：2011.9.29
Country of applicant：Domestic
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鋳物用アルミニウム合金
大澤嘉昭，高森 晋，皆川和己，垣澤英樹，梅澤 修，原田幸明
Applicant：物質・材料研究機構
Application no：2007-058303 Date applied：2007.3.8
Patent/Registration no：4551995 Date issued：2010.7.23
Country of applicant：Domestic
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Al-Si系合金の製法
梅澤 修
Applicant：よこはまティエルオー
Application no：2003-378043 Date applied：2003.11.7
Patent/Registration no：4103959 Date issued：2008.4.4
Country of applicant：Domestic
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アルミニウム系鋳造合金の凝固結晶組織を制御する方法
大澤嘉昭，高森 晋，皆川和己，垣澤英樹，梅澤 修，原田幸明
Applicant：物質・材料研究機構
Application no：2002-379104 Date applied：2002.12.27
Country of applicant：Domestic
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高燐鋼板製造装置及び高燐鋼板製造方法
中嶋 宏，高谷英明，梅澤 修，平田耕一
Applicant：三菱重工業
Application no：2001-280468 Date applied：2001.9.14
Patent/Registration no：3549000 Date issued：2004.4.30
Country of applicant：Domestic
Awards 【 display / non-display 】
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学術功績賞（林賞）
2020.6 一般社団法人 日本熱処理技術協会 ひずみ不整に起因するき裂形成機構と組織学的要因との関係解明
Individual or group name of awards： 梅澤 修
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High Quality Paper Award
2019.11 The 25th Small Engine Technology Conference (SETC2019) Influence of Surface Compound Layer on Fatigue Strength of Nitrided Chromium Molybdenum Steel
Individual or group name of awards： Tsuyoshi Kubota, Osamu Umezawa
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里見賞
2019.10 公益財団法人里見奨学会 極低炭素鋼表面の窒化化合物層組織の微細化と疲労き裂形成に及ぼす影響
Individual or group name of awards： 梅澤修
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Best Structural Materials Paper
2019.7 International Cryogenic Materials Conference
Individual or group name of awards： Norimitsu Koga, Weisi Zhang, Osamu Umezawa, Valentin Tschan, Jan Sas, Klaus-Peter Weiss
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論文賞
2018.5 日本熱処理技術協会 ガス窒化処理したSCM435鋼の回転曲げ疲労強度に及ぼす表面化合物相の影響
Individual or group name of awards： 平岡 泰，石田暁丈，梅澤 修
Grant-in-Aid for Scientific Research 【 display / non-display 】
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極低温用構造材料厚肉材の高強度化と耐き裂形成に優れる金属組織制御法の開発
2021.4 - 2024.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Grant type：Competitive
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転位の集団運動とひずみ不整合に着目した内部疲労き裂形成の解明
2016.4 - 2019.3
科学研究費補助金 Grant-in-Aid for Scientific Research(C)
Investigator(s)：梅澤 修
Grant type：Competitive
Other external funds procured 【 display / non-display 】
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破壊に強い延性二相チタン合金の組織設計原理の確立
2020.4 - 2023.2
鉄鋼協会研究プロジェクト
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鋼中炭素の存在状態評価と微小球反発硬さ試験法の適用開発
2019.4 - 2020.3
単年度研究助成
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原型炉超伝導TFコイルに向けた極低温用構造材料の高強度化に関する研究開発
2018.11 - 2019.3
Local Government 委託研究
Investigator(s)：梅澤 修
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疲労変形によりBCC鉄中の粒界近傍に形成するひずみ不整合とき裂発生モデルの解析
2014.6 - 2016.5
Local Government 鉄鋼研究振興助成
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炭酸カルシウムスケール付着を抑制する鋼の表面改質技術の開発
2013.9 - 2016.2
NEDO平成25年度地熱発電技術研究開発
Investigator(s)：盛田元彰
Presentations 【 display / non-display 】
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A Subsurface fatigue crack generation model in near alpha titanium at low temperature
Osamu Umezawa, Weibo Li
Thermec 2018 ( Paris)
Event date： 2018.7
Language：English Presentation type：Oral presentation (general)
Venue： Paris
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Growth of ecomaterials and eco-efficiency in major metallic structural materials
Osamu Umezawa, Yoshikazu Shinohara, Kohmei Halada
13th International Conference on Ecomaterials 2017 (ICEM13) (Bangkok, Thailand)
Event date： 2017.11
Language：English Presentation type：Oral presentation (invited, special)
Venue：Bangkok, Thailand
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グリーンモノづくりの課題とアジアの役割
第11回エコマテリアル国際会議プレシンポジウム—日本発のモノづくり：東南アジア（ベトナム）展開への期待— (東京)
Event date： 2013.3
Language：The in addition, foreign language Presentation type：Oral presentation (invited, special)
Venue：東京
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Subsurface Crack Generation Under Rolling Contact Fatigue in Steels
The First Symposium on Ecomaterials and Processing Technology
Event date： 2012.10
Language：The in addition, foreign language Presentation type：Oral presentation (invited, special)
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Crack Growth Modeling Under Rolling Contact Fatigue
Event date： 2012.9
Language：The in addition, foreign language Presentation type：Oral presentation (general)
Preferred joint research theme 【 display / non-display 】
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多結晶金属の不均一変形とき裂発生モデリング
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不均一変形材料の疲労破壊
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軽量・難加工金属の高付加価値化成形
Past of Collaboration and Commissioned Research 【 display / non-display 】
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破壊に強い延性二相チタン合金の組織設計原理の確立
Offer organization: 日本鉄鋼協会 Cooperative Research within Japan
Project Year： 2020.4 - 2022.3
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表面硬化部材の疲労損傷研究部会
Cooperative Research within Japan
Project Year： 2019.4 - 2022.3
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原型炉超伝導TFコイルに向けた極低温用構造材料の高強度化に関する研究開発
Offer organization: 量子科学技術研究開発機構 Cooperative Research within Japan
Project Year： 2018.11 - 2020.3
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表面硬化部材の疲労損傷研究部会
Cooperative Research within Japan
Project Year： 2017.3 - 2019.3
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鉄鋼のミクロ組織要素と特性の量子線解析研究会
Offer organization: 日本鉄鋼協会 Others
Project Year： 2017.2 - 2020.1
Charge of on-campus class subject 【 display / non-display 】
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2021 先進材料工学特論
Graduate school of Engineering Science
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2021 疲労強度組織学特論
Graduate school of Engineering Science
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2021 材料工学インターンシップS
Graduate school of Engineering Science
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2021 材料工学インターンシップM
Graduate school of Engineering Science
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2021 材料工学インターンシップL
Graduate school of Engineering Science
Charge of off-campus class subject 【 display / non-display 】
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材料学特論II
Institution：東海大学
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基礎結晶科学
Institution：横浜市立大学
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材料設計と評価技術の最前線
Institution：東京工業大学
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金属工学特別講義第一
Institution：東京工業大学
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鉄と鋼の材料技術
Institution：放送大学
Committee Memberships 【 display / non-display 】
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日本熱処理技術協会
2021.6 - 2024.6 副会長
Committee type：Academic society
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日本金属学会
2020.5 - 2022.4 代議員
Committee type：Academic society
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日本鉄鋼協会
2020.4 - 2024.4 理事
Committee type：Academic society
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日本鉄鋼協会育成委員会
2020.4 - 2024.3 委員長
Committee type：Academic society
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国立大学教育研究評価委員会
2020.2 - 2021.3 専門委員
Committee type：Government
Social Contribution(Extension lecture) 【 display / non-display 】
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28th IFHTSE Congress
2023.11
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15th International Conference on Ecomaterials
2022.11
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9th New Methods of Damage and Failure Analysis of Structural Parts
2022.9
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2022.3
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2021.3