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Crystal Plasticity Lab
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The lab explores the mechanisms of deformation and fracture that occur inside materials.
AboutAbout the lab
Exploring how materials deform and fracture
The Crystal Plasticity Lab studies how materials such as metals deform and break.
The lab uses methods such as electron microscopy and micromechanical testing to examine deformation and fracture occurring inside materials.
When force is applied to a material, the arrangement of atoms in the crystal shifts slightly and defects move.
The lab holds that understanding such microscale behavior leads to the design of stronger, safer, and more reliable materials.
Key terms
- Dislocation
- A defect in the arrangement of atoms in a crystal. It moves when a material deforms under force
- Brittle fracture
- A phenomenon in which a metallic material breaks with almost no deformation. The crack propagates extremely fast
- Three-dimensional electron tomography
- A technique that takes continuous images of a specimen from around it and reconstructs them into a 3D structure on a computer
NewsLab news
Paper: awarded the Paper Award (Physical Properties Division) by the Japan Institute of Metals and Materials
Paper: awarded the Paper Award (Mechanical Properties Division) by the Japan Institute of Metals and Materials
A master's student received an Excellence Award at the FY2025 Autumn Meeting of the Iron and Steel Institute of Japan
A master's student received an Excellent Poster Award at the 2025 Autumn Meeting of the Japan Institute of Metals and Materials
A master's student received an Excellent Poster Award at the Kyushu Branch Joint Academic Meeting
ResearchResearch themes
The lab aims to clarify what happens inside a material from the time force, heat, or other loads are applied, through deformation, until it eventually breaks. It deforms and fractures materials under various conditions and investigates the internal phenomena from the information obtained.
*Illustrative imageUnderstanding fracture that occurs as materials become brittle at low temperatures
The lab studies brittle fracture, in which steel breaks at low temperatures with almost no deformation. In ferritic steel it examines the effect of alloying elements, and in pearlitic steel it examines the mechanism of longitudinal cracking that occurs during wire drawing.
*Illustrative imageDislocations at crack tips in silicon
When a silicon wafer has a crack, the number of dislocations around it increases. Using three-dimensional electron tomography, the lab examines how dislocations change near the crack tip.
MembersFaculty
The members of the Crystal Plasticity Lab consist of faculty, technical staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorMasaki Tanaka
- Associate ProfessorShigeto Yamasaki
- Assistant ProfessorTatsuya Morikawa
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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: “Inspekt desk 50kN IMGP8563” Smial / CC BY-SA 2.0 de (cropped)
- Understanding fracture that occurs as materials become brittle at low temperatures: “The brittle fracture surface of low-carbon steel” DanilovVA / CC BY-SA 4.0 (cropped)
- Dislocations at crack tips in silicon: “IMaGe 31072R – Silicon Wafer 20120926” Rob Bulmahn / CC BY 2.0 (cropped)
- Related lab (構造材料工学研究室): “Microstructure of a stainless steel A961” Djhé / CC BY 4.0 (cropped)
- Related lab (ナノ材料組織解析学研究室): “TEM analysis” ZhanserikKT / CC BY 4.0 (cropped)
- Related lab (融体物理化学研究室): “Molten Metal Pouring from a Ladle” Mnooralam11 / CC BY 4.0 (cropped)
- Related lab (半導体工学研究室): “Voyager Program - RTG upclose” NASA/JPL / Public domain (cropped)
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