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Joining Microstructure Design Lab [Joining and Welding Research Institute]
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A lab that uses materials science to clarify the microstructure and properties of welded and joined parts.
AboutAbout the lab
Reading the microstructure of joints to improve reliability.
The Joining Microstructure Design Lab studies the properties of welded and joined parts from a materials science perspective, aiming to create technologies to control and predict them.
To make industrial products and structures from high-performance materials, welding and joining technologies that fully draw out the properties of the materials are essential.
Covering various methods such as fusion joining and solid-state joining, the lab studies how to improve the properties and reliability of joints, whether between materials of the same type or of different types.
On the institute's website, this lab is introduced under the name "Joining Microstructure Evaluation Lab."
Key terms
- Solid-state joining
- A joining method in which materials are bonded while remaining solid, without melting them.
- Solidification and transformation
- The change in which molten metal solidifies, and the change in which the internal crystal structure changes while the metal remains solid.
- Corrosion resistance
- The property of a metal resisting rust and corrosion.
ResearchResearch themes
To make the fullest use of the properties and functions of materials, the lab aims to evaluate the properties of welded and joined parts with high accuracy, identify the factors that govern those properties, and create technologies to control and predict them. Research themes include resistance spot welding of high-performance thin sheets, joining interfaces between dissimilar materials, prevention of weld cracking, and corrosion resistance of welds.
Improving Joint Properties and Reliability
This research aims to improve the properties and reliability of joints between similar or dissimilar materials, across various joining processes such as fusion joining and solid-state joining. The lab investigates the mechanisms by which joints form, aiming for new joining technologies that allow the properties to be controlled.
*Illustrative imageEvaluating and Predicting Microstructure Formation and Service Life
The lab works on understanding the solidification and transformation behavior of materials and clarifying how the microstructures of welded and joined parts form. Aiming to evaluate and predict reliability and service life, such as corrosion resistance and mechanical properties, it conducts research using experiments and simulation.
MembersFaculty
- ProfessorRinsei Ikeda
- Associate ProfessorKota Kadoi
- Assistant ProfessorHOU Yuyang
VoicesStudent voices
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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: “Stainless pipe weld joints” Flattrackers and Caferacers Parts and bikebuilds / CC BY-SA 2.0 (cropped)
- Evaluating and Predicting Microstructure Formation and Service Life: “Microstructure of AISI 430 cooled in air after heating to 950 deg C” Sérgio Souto Maior Tavares, Luis Felipe Guimarães de Souza, Tatiane de Campos Chuvas, Cássio Lapate da Costa Machado, & Brígida Bastos de Almeida / CC BY 4.0 (cropped)
- Related lab (Process Metallurgy Lab): “US Army soldier welding two metal pieces, Fort Gregg-Adams, Virginia, March 2025” Juan F. Jimenez, Army / Public domain (cropped)
- Related lab (Process Mechanics Lab): “Ultrasonic Welding” NearEMPTiness / CC BY-SA 3.0 (cropped)
- Related lab (Welding and Joining Process Engineering Lab): “Refill friction stir spot welding robot CR HR” Guruvignesh Lakshmi Balasubramaniam,1 Enkhsaikhan Boldsaikhan,1* Shintaro Fukada,2 Mitsuo Fujimoto2 and Kenichi Kamimuki3 1 Industrial, Systems & Manufacturing Engineering Department, Wichita State University, Wichita, KS 67260, USA 2 Corporate Technology Division, Kawasaki Heavy Industries, Ltd., Akashi 673-8666, Japan 3 Aerospace Division, Kawasaki Heavy Industries, Ltd., Kakamigahara 504-8710, Japan * Author to whom correspondence should be addressed. / CC BY 4.0 (cropped)
- Related lab (Solid Mechanics Lab): “The brittle fracture surface of low-carbon steel” DanilovVA / CC BY-SA 4.0 (cropped)
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