UMEZAWA Osamu

Affiliation

Faculty of Engineering, Division of Systems Research

Job Title

Professor

Research Fields, Keywords

極低温特性, Microstructure of Metals and Alloys, Fracture, 疲労, Deformation

Mail Address

E-mail address

Related SDGs




ORCID  https://orcid.org/0000-0003-0380-1885

The Best Research Achievement in the last 5 years 【 display / non-display

Education 【 display / non-display

  •  
    -
    1986.3

    Waseda University   Metallurgical Engineering   Graduated

Degree 【 display / non-display

  • Doctor of Engineering - Waseda University

Campus Career 【 display / non-display

  • 2017.4
     
     

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Professor  

  • 2006.4
    -
    2017.3

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Professor  

  • 2001.11
    -
    2006.3

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Associate Professor  

  • 2019.4
     
     

    Concurrently   Yokohama National UniversityInstitute of Advanced Sciences   Center for Creation of Symbiosis Society with Risk   Professor  

  • 2019.4
    -
    2023.3

    Concurrently   Yokohama National UniversityFaculty of Engineering   Dean  

display all >>

External Career 【 display / non-display

  • 2019.1
    -
    2023.12

    Vysoká Škola Báňská - Technical University of Ostrava   Senior researcher  

  • 2001.4
    -
    2001.10

    National Institute for Materials Science   Senior Researcher  

  • 1996.4
    -
    2001.3

    National Institute for Metals, Sience and Technology Agency   Senior Researcher  

  • 1993.10
    -
    1995.3

    University of Cambridge   Department of Materials Science and Metallurgy   Visiting Fellow  

  • 1993.10
    -
    1995.3

    Japan Research and Development Corporation   Researcher  

display all >>

Academic Society Affiliations 【 display / non-display

  • 2008.6
     
     
     

    日本熱処理技術協会

  • 2001.12
     
     
     

    Ecomaterials Forum

  • 1998.7
     
     
     

    Japan Institute for Light Metals

  • 1986.1
     
     
     

    Japan Institute for Metals

  • 1986.1
     
     
     

    The Iron and Steel Institute of Japan

Research Areas 【 display / non-display

  • Nanotechnology/Materials / Structural materials and functional materials

  • Nanotechnology/Materials / Material processing and microstructure control

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Mechanics of materials and materials

  • Environmental Science/Agriculture Science / Environmental load reduction and remediation

 

Research Career 【 display / non-display

  • Deformation and Fracture of Steels

    Project Year:

  • Deformation and Farcture of Titanium Alloys

    Grant-in-Aid for Scientific Research  

    Project Year:

  • Process and Materials Design in alloys

    The Other Research Programs  

    Project Year:

  • 表面硬化部材の疲労き裂形成

    Project Year:

Books 【 display / non-display

  • 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

     More details

    Language:Japanese Book type:Scholarly book

  • Handbook of Ecomaterials

    Yoshikazu Shinohara and Osamu Umezawa( Role: Contributor)

    Springer International Publishing  ( ISBN:978-3-319-68254-9

     More details

    Responsible for pages:961-966   Language:English Book type:Scholarly book

  • Handbook of Ecomaterials

    Osamu Umezawa, Yoshikazu Shinohara, and Kohmei Halada( Role: Contributor)

    Springer International Publishing  ( ISBN:978-3-319-68255-6

     More details

    Responsible for pages:2261-2280   Language:English Book type:Scholarly book

  • Standard Microstructures Group 1: Carbon steel & cast irons

    Materials Technology Education Association( Role: Supervisor (editorial))

    Yamamoto Scientific Tool Laboratory 

     More details

    Language:English Book type:Scholarly book

  • 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

    Amazon

     More details

    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。

display all >>

Thesis for a degree 【 display / non-display

  • 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]

    DOI

     More details

    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

  • Effects of crystallographic texture on subsurface fatigue crack generation in Ti-Fe-O alloy at low temperature

    Osamu Umezawa, Weibo Li

    ISIJ International   62 ( 3 )   2022.3  [Reviewed]

    DOI CiNii

     More details

    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>

  • 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]

    DOI

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • 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]

    DOI

     More details

    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • 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

    Materials Transactions   63 ( 2 )   148 - 156   2022.1  [Reviewed]

    DOI

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • 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]

    DOI CiNii

     More details

    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>

display all >>

Review Papers 【 display / non-display

  • 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]

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Single Work  

  • 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]

    DOI

     More details

    Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Single Work  

  • 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]

    DOI

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Single Work  

  • 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]

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)   Joint Work  

  • 鉄鋼材料の疲労特性と熱処理

    梅澤 修

    MECHANICAL SURFACE TECH   43   38 - 40   2018.4

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)   Single Work  

display all >>

Industrial Property Rights 【 display / non-display

  • 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

     More details

    Applicant:横浜国立大学

    Application no:2011-215240  Date applied:2011.9.29

    Country of applicant:Domestic  

  • 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

     More details

    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  

  • Al-Si系合金の製法

    梅澤 修

     More details

    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  

  • 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

     More details

    Applicant:物質・材料研究機構

    Application no:2002-379104  Date applied:2002.12.27

    Country of applicant:Domestic  

  • 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

     More details

    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  

display all >>

Awards 【 display / non-display

  • 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

  • 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

  • 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

  • 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

  • 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

display all >>

Grant-in-Aid for Scientific Research 【 display / non-display

  • 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)

      More details

    Grant type:Competitive

  • 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

      More details

    Grant type:Competitive

Other external funds procured 【 display / non-display

  • 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

  • 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

  • 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

  • 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

  • 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

  • A Subsurface fatigue crack generation model in near alpha titanium at low temperature

    Osamu Umezawa, Weibo Li

    Thermec 2018  ( Paris) 

     More details

    Event date: 2018.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue: Paris  

  • 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) 

     More details

    Event date: 2017.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Bangkok, Thailand  

  • 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) 

     More details

    Event date: 2013.3

    Language:The in addition, foreign language   Presentation type:Oral presentation (invited, special)  

    Venue:東京  

  • Subsurface Crack Generation Under Rolling Contact Fatigue in Steels

    The First Symposium on Ecomaterials and Processing Technology 

     More details

    Event date: 2012.10

    Language:The in addition, foreign language   Presentation type:Oral presentation (invited, special)  

  • Crack Growth Modeling Under Rolling Contact Fatigue

     More details

    Event date: 2012.9

    Language:The in addition, foreign language   Presentation type:Oral presentation (general)  

display all >>

Preferred joint research theme 【 display / non-display

  • 多結晶金属の不均一変形とき裂発生モデリング

  • 不均一変形材料の疲労破壊

  • 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

  • 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 

  • 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 

  • 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 

  • 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 

  • 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 

display all >>

 

Charge of on-campus class subject 【 display / non-display

  • 2021   先進材料工学特論

    Graduate school of Engineering Science

  • 2021   疲労強度組織学特論

    Graduate school of Engineering Science

  • 2021   材料工学インターンシップS

    Graduate school of Engineering Science

  • 2021   材料工学インターンシップM

    Graduate school of Engineering Science

  • 2021   材料工学インターンシップL

    Graduate school of Engineering Science

display all >>

Charge of off-campus class subject 【 display / non-display

  • 材料学特論II

    Institution:東海大学

  • 基礎結晶科学

    Institution:横浜市立大学

  • 材料設計と評価技術の最前線

    Institution:東京工業大学

  • 金属工学特別講義第一

    Institution:東京工業大学

  • 鉄と鋼の材料技術

    Institution:放送大学

 

Committee Memberships 【 display / non-display

  • 日本熱処理技術協会

    2021.6 - 2024.6  副会長

     More details

    Committee type:Academic society 

  • 日本金属学会

    2020.5 - 2022.4  代議員

     More details

    Committee type:Academic society 

  • 日本鉄鋼協会

    2020.4 - 2024.4  理事

     More details

    Committee type:Academic society 

  • 日本鉄鋼協会育成委員会

    2020.4 - 2024.3  委員長

     More details

    Committee type:Academic society 

  • 国立大学教育研究評価委員会

    2020.2 - 2021.3  専門委員

     More details

    Committee type:Government 

display all >>

Social Contribution(Extension lecture) 【 display / non-display

  • 28th IFHTSE Congress

    2023.11

  • 15th International Conference on Ecomaterials

    2022.11

  • 9th New Methods of Damage and Failure Analysis of Structural Parts

    2022.9

  • "

    2022.3

  • "

    2021.3

display all >>