źҰ Cvݽ (absorb energy) Ⱦâ(Lateral expansion) ?
à Ϲ źҰ(Ferritic steels) 10mm x 10mm ϴ , ݽ Ⱦâ 1
100J Ⱦâ Ŀ ϴ. 100J̻ ʱ .
LE(mm) = Charpy energy (J)/100
1. Charpy impact energy