Student written Research Laboratory Guidebook 2023Nagaoka University of Technology

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Material strength/Bonding strength laboratory

Professor / Yukio MIYASHITA

ProfessorYukio MIYASHITA

profiles and activiities profiles and activiities at nagaoka university of technology
  • Small multinational society
  • Making a real breakthrough in material scinece
  • Removing language barrier


Professor / Yukio MIYASHITA
Miyashita sensei is really considerate of the students. He gave his students respect and freedom. Despite his busy working schedule, he always tries to take care of his students not only in their study but also other problems from all walks of life. Miyashita sensei has been respected by many students including graduated students because his great support and encouragement in research work.

Research Content

Our laboratory have many research topic that are:
1.strength characteristic of dissimilar materials joint by using friction stir welding
2.Relationship between fatigue and welding process of welded and improved joints of Mg-Al-Zn-Ca Alloy
3.Producing Green composite by using friction stirring
4.The fatigue characteristics of automotive engine component
5.Frinction string and making composite during joining of thermoplastic resin6.Laser welding of dissimilar joint between resin and metal The research area is extent that is relative to materials strength, interface strength and technique of machining processes.

Developed Magnesium alloy Rearframe for motorcycles (Joint researcch with Yamaha Motor Co.,Ltd.)

A Day in the Lab

Our lab and Otsuka lab spend a lot of time together, there are many international students coming from other nations so English is often used for communication. Being member of our lab, it would be a great chance for students not only to broaden their academic knowledge but also to make friends and understand the custom and culture of many other countries in the world. We are day by day making great effort to create professional and friendly working environment.

laboratory trip

Thesis Subjects

  • (M)Fabrication of TZM alloy matrix composite by spark plasma sintering
  • (M)Relationship between fatigue strength characteristics and welding process in TIG welded non-combustible Mg-Al-Zn-Ca extruded alloy joint
  • (D)Microstructural Factors Influenciong Fatigue Crack Growth Mechanism in Low-Carbon and High-Carbon Steel

The number of
PhD Graduates


Major employers of Graduates

  • Mitsubishi Motors Co.,Ltd
  • Hitachi Metals, Ltd
  • Toshiba Materials Co.,Ltd
  • Nippon Light Metal Company, Ltd
  • Sumitomo Chemical Engineering Co.,Ltd
  • Kobe Material Testing Laboratory Co.,Ltd
  • Globeride, Inc
Writer : SHAO XUANYI, Science of Technology Innovation
(Meitoku-gijuku high school)