Materials Design Division

Environmentally Robust Materials Research Laboratory

Eiji AKIYAMA

Prof.Eiji AKIYAMA

  • Assoc. Prof. Motomichi KOYAMA
  • Assist. Prof. Tomohiko HOJO
  • Assist. Prof. Saya AJITO

Elucidation of Effects of Hydrogen on Material Properties and Design of Environmentally Robust Materials

This laboratory is devoted to studying hydrogen embrittlement of structural materials used for constructions, automobiles, nuclear materials and so forth, which is caused by a small amount of absorbed hydrogen. We are investigating the role of hydrogen on mechanical property and hydrogen uptake caused by corrosion. For safety and reliability, we are also working on the proposal of evaluation methods for hydrogen embrittlement property and on the design of environmentally robust materials.

We investigate the effect of hydrogen concentration in metals, metallurgical microstructure and hydrogen uptake from the environment on hydrogen embrittlement by means of mechanical tests of hydrogen-charged specimens, thermal desorption analysis, monitoring of hydrogen desorption due to stress/strain-induced phase transformation, hydrogen visualization techniques and electrochemical techniques. Furthermore, we aim at developing a novel structure control method utilizing the effect of hydrogen in metals.

structural materials, hydrogen embrittlement, corrosion, electrochemistry, hydrogen
Evaluation of hydrogen embrittlement property of high strength steels by means of mechanical tests of hydrogen-charged specimens in conjunction with hydrogen desorption analysis and observation

Evaluation of hydrogen embrittlement property of high strength steels by means of mechanical tests of hydrogen-charged specimens in conjunction with hydrogen desorption analysis and observation

A tensile test machine in a vacuum chamber equipped with a quadrupole mass spectorometer to monitor hydrogen desorption caused by stress/strain martensitic transformation

A tensile test machine in a vacuum chamber equipped with a quadrupole mass spectorometer to monitor hydrogen desorption caused by stress/strain martensitic transformation

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