2214 アルミニウム合金の水素脆化メカニズム解明のための分子動力学シミュレータの構築

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  • 2214 Development of molecular dynamics simulator for mechanism analysis of hydrogen embrittlement of aluminium alloy

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This paper proposes a computational modeling and simulation methodology to analyze the mechanism of Hydrogen Embrittlement of Aluminium alloy. The Hydrogen Embrittlement is the process especially by which high-strength Aluminimum alloy (7000 series), become brittle and fracture following exposure to hydrogen. The mechanism starts with lone hydrogen atoms diffusing through the metal. The Hydrogen Embrittlement is represented as a mechanism which starts with lone hydrogen atoms diffusing through the Aluminium alloy. When these hydrogen atoms re-combine in minuscule voids such as dislocation accumulation and grain boundary, the combined hydrogen atoms create high pressure from inside the cavity which they are in. A computational simulator is developed and succeed to simulate the forming process of the granular boundary, movement of dislocation, and fracture.

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