Al-Zn超塑性共析合金の引張りおよびクリープ挙動

抄録

Mechanical behaviors in tensile and creep tests at room temperature were investigated for a model material of the superplastic Al-Zn eutectoid alloys. The equation σ= Kε^m. is proved in the alloys which are isotropical and non-work hardenable. The maximum load poit or the initiative poit of tertiary creep bears no relation to the initiation of necking. The increasing poit of ε at which the equation σ = Kε^m becomes unapplicable can be regarded as the real initiation of necking. Where ε is strain rate, σ true stress, and K and m coefficients of strain rate sensitivity.