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Inamura Lab
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The lab rethinks metal microstructures through geometry to design new alloys.
AboutAbout the lab
Identifying universal principles to create new materials
The Inamura Lab studies metallic materials such as shape memory alloys, magnesium alloys, and steels.
The lab reexamines the microstructures visible under a microscope, and how they deform, from the perspective of the geometry of shape.
Moving between theory and experiment, the lab explores the principles by which microstructures form and their mechanical mechanisms.
Based on these findings, the lab aims to build guidelines for materials design leading to actuators, medical technologies, lightweight structural materials, and high-strength steels.
Key terms
- Microstructure
- The substructure, such as the arrangement and size of crystals, that appears when metal is viewed under a microscope
- Shape memory alloy
- A metal that returns to its original shape when heated after being deformed. Used in settings such as medicine
- Dislocation
- A misalignment in the arrangement of atoms in a crystal. When it accumulates, it degrades material properties
NewsLab news
A master's student received an Excellence Award at the master's interim presentation
A paper by Assistant Professor Matsumura has been published
A paper submitted by a doctoral student has been published
A master's student received the Best Award at the Iron and Steel Institute of Japan Student Poster Session
Professor Inamura received the Nishiyama Memorial Award
ResearchResearch themes
The lab rethinks the “microstructure” that governs the properties of metallic materials from the geometry of shapes and deformation. It captures the outline of microstructures mathematically, verifies the mechanisms through experiments, and links them to materials design.
*Illustrative imageUltra-Long-Life Shape Memory Alloys
Shape memory alloys lose performance with repeated use, and one cause is lattice defects called dislocations. The lab mathematically shows the conditions for a coherent internal structure in which dislocations do not form, and is developing long-lasting alloys together with companies.
*Illustrative imageStrengthening Mechanism of Magnesium Alloys
Magnesium alloys with a long-period stacking ordered structure become very strong through kink deformation. The lab aims to clarify, through both experiment and theory, how the connectivity of deformation restricts crystal slip.
*Illustrative imageMartensite Microstructure in Steel
The shape of the lath martensite microstructure formed in iron is determined by how small crystals connect to one another. The lab has built a theory that reorganizes these rules geometrically, and verifies it through observation in joint research with steel manufacturers.
MembersFaculty
The Inamura Lab consists of faculty members, master's and undergraduate students, research students, administrative assistants, and technical assistants.As of 2026
- ProfessorTomonari InamuraPublications ↗
- Assistant ProfessorRyutaro MatsumuraPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Field of Grains 9x )” Savannah River Site / Public domain (cropped)
- Ultra-Long-Life Shape Memory Alloys: “Nitinol draht” Petermaerki / CC BY-SA 3.0 (cropped)
- Strengthening Mechanism of Magnesium Alloys: “Mg alloy car engine blocks” Mark Fergus / CC BY 3.0 (cropped)
- Martensite Microstructure in Steel: “Gdansk Nowy Port kregi” Andrzej Otrębski / CC BY-SA 3.0 (cropped)
- Related lab (Kimura Lab): “Axial compressor rotor of a gas turbine, Deutsches Museum” Wilfredor / CC0 (cropped)
- Related lab (Hosoda-Tahara Lab): “Nitinol bueroklammer verbogen” Petermaerki / CC BY-SA 3.0 (cropped)
- Related lab (Takeyama-Kobayashi Lab): “Gas Turbine 4” Pro-Per Energy Services / CC BY-SA 4.0 (cropped)
- Related lab (Kobayashi Lab): “Titanium metal” US gov / Public domain (cropped)
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