INTRODUCTION OF LABORATORY

We develop innovative heat-resistant materials such as new titanium alloys, shape memory alloys and high-entropy alloys with high performance in high-temperature use, i.e., jet engines and power generation systems. Especially, we focus on processing to maximize the relation between mechanical properties and microstructures. Heavy forging, 3D additive manufacturing etc. are the prospected technologies to improve the materials’ potential.

YOKO YAMABE-MITARAI & TETSUYA MATSUNAGA Lab. research

 

加工条件を変化させることにより得られる組織を評価し、組織が力学特性に与える効果を明らかにするとともに、優れた力学特性を引き出すための加工方法を確立する。

YOKO YAMABE-MITARAI & TETSUYA MATSUNAGA Lab. research

 

加工後に導入される歪み量を調べることにより(左)、その後の熱処理により形成する組織制御に繋げる。形成する組織により、同じ合金でもクリープ寿命が大きく異なる(右)。

YOKO YAMABE-MITARAI & TETSUYA MATSUNAGA Lab. research

 

(上)形状記憶合金に生成するマルテンサイト双晶組織。高温強度向上と組織制御により高温で完全回復する形状記憶合金を創製する。 (下)赤外線カメラによって観察した応力振幅を受ける試験片内の散逸エネルギーの分布。疲労特性の迅速評価等に利用する。

YOKO YAMABE-MITARAI & TETSUYA MATSUNAGA Lab. research

 

クリープ試験は、材料の寿命を測定する手法で、対象となる材料の使用温度、応力におけるクリープ特性(破断までの時間やひずみの時間依存性)を取得します。当研究室では、航空機用エンジンに用いられる金属材料、特にチタン合金のクリープ特性を取得しています。さらに、クリープ特性に対する加工および熱処理温度などのプロセス依存性を明らかにすることで、耐熱チタン合金の合金設計指針の構築に活用しています。

MESSAGE

MATERIALS SCIENCE AND ENGINEERING IS THE KEY TECHNOLOGY FOR ALL KINDS OF ENGINEERING.NEW MATERIALS CAN DESIGN UNLIMITED WORLD BEYOND THE UNIVERSE.

I, Mitarai, wanted to study mechanical engineering because I was interested in building robots. When I noticed my wish was not realized, I started to study material science. But I feel it is not bad because I can interact with various fields and attractive people through the research with materials installed in aircraft engines. Dr. Matsunaga worked in JAXA and is interested in materials used in aerospace, and contributes to aerospace field through metallic materials science. The reason why we get into the project is COFFEE. I met him in his boss’s office and talked about titanium during his coffee break.There are some trends in research field. I've been working on rather minor research topics. However, I have continued these topics no matter how others think about my research. And if I keep going, others recognize, "Mitarai is the specialist of this field." I think that I have been able to continued my research because I have not given up my interest topics and I like understanding new things. It would be nice if you could reach world-leading finding by probing into phenomena what you feel fun.

PROFILE

PROFESSOR YOKO YAMABE-MITARAI

PROFESSOR YOKO YAMABE-MITARAI

1989 Bachelor of Engineering, Department of Metallurgical Engineering, Tokyo Institute of Technology

1991 Master of Engineering, Department of Metallurgical Engineering, Tokyo Institute of Technology

1994 Doctor of Engineering, Department of Metallurgical Engineering, Tokyo Institute of Technology

1994 JSPS fellowship(PD)Visiting Researcher, Manchester University (Britain)

1995 Researcher, National Research Institute for Metals (NRIM)

1999 Senior Researcher, NRIM

2001 NRIM changed to National Institute for Materials Science (NIMS)

2006 Group Leader, NIMS

2016 Deputy director of Research Center for Structural Materials, NIMS

2020 Professor, Department of Advanced Material Science, The University of TokyoLecturer

LECTURER TETSUYA MATSUNAGA

LECTURER TETSUYA MATSUNAGA

2005 B.S. in Faculty of Engineering, Tokyo Metropolitan Institute of Technology

2007 M.S. in Faculty of Engineering, The University of Tokyo

2010 Ph. D. in School of Physical Sciences, The Graduate University for Advanced Studies

2010 Project Research Associate, Japan Aerospace Exploration Agency

2011 Assistant Professor, Institute for Materials Research, Tohoku University

2014 Researcher, National Institute for Materials Science (NIMS)

2016 Visiting Researcher, The Ohio State University

2017 Senior Researcher, National Institute for Materials Science

2020 Lecturer, Department of Advanced Material Science, The University of Tokyo

STUDENT VOICE

Wataru Yanao/Takeshi Ishida

Wataru Yanao (left)
Takeshi Ishida (right)

Prof. Mitarai and Lecturer Matsunaga are very friendly, so we can ask them for advice and have a chat easily. I did not know what to do in my research at first, but I finally finished my graduate thesis by their useful advice for my research, my thesis and presentation.

Our laboratory just started last year, so it is interesting for me to see how the laboratory is developed. In addition, the atmosphere of our laboratory is very friendly, so we can enjoy research.


Visiting laboratory

  • 04-7136-3783(Mitarai)
  • 04-7136-3815(Matsunaga)
  • YOKO YAMABE-MITARAI & TETSUYA MATSUNAGA LAB.
  • Graduate School of Frontier Sciences,
  • The University of Tokyo
  • Kashiwanoha 5-1-5,
  • Kashiwa,Chiba 277-8561, Japan
  • mitarai.yoko@edu.k.u-tokyo.ac.jp
  • matsunaga@edu.k.u-tokyo.ac.jp