材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
軟鋼の溶融亜鉛ぜい性におけるき裂伝ぱ挙動
中佐 啓治郎武井 英雄松田 雅彦
著者情報
ジャーナル フリー

1988 年 37 巻 413 号 p. 166-170

詳細
抄録

The precracked specimens of mild steel (JIS: SS41) were tensile tested in liquid zinc kept at various temperatures, T, and the crack propagation behavior and crack propagation mechanism were discussed.
The crack propagation velocity da/dt increased with increasing J-integral at every T. Under the same J-integral, da/dt increased with increasing T until T=803K, but da/dt decreased with increasing T beyond T=803K. The crack propagation velocity da/dt was large when the length of intergranular diffusion region was large. The crack propagation mechanism of the steel seemed to be that the zinc vapor, which adsorbed on the crack tip, diffused along the grain boundary to weaken the crack tip area. The J-integral and temperature dependency of da/dt were able to be explained to some degree by a unidimensional intergranular diffusion model.

著者関連情報
© 日本材料学会
前の記事 次の記事
feedback
Top