抄録
Tensile tests were carried out on the precracked specimens of mild steel in liquid zinc in order to investigate the crack propagation resistance of mild steel against liquid zinc embrittlement.
The maximum load, Pmax, decreased at the existence of liquid zinc, i.e. Pmax can be used as a measure of liquid zinc embrittlement in the precracked specimens. Pmax decreased with decreasing tensile speed, x2, and with increasing testing temperature, T, but it was independent of annealing temperature or ferrite grain size. The relation among x2(m/s), Pmax(N) and T(K) was represented by the following equation.
x2=3.11×10-42Pmax15.9exp(-92000/RT)
where R is gas constant.
