Analysis shows that the solidification cracking was always formed and developed along film-like sulphides at columnargrain boundaries.
分析认为，凝固裂纹是沿偏聚在柱状晶晶界的低熔点膜状硫化物形成并扩展的。
2
But in the backing welding, columnargrain-growth will be appeared in the direction of crystal direction, it effects the welding quality seriously.
但是单面焊打底层焊缝中出现的沿焊缝柱状晶结晶方向的柱状气孔，严重地影响着船舶焊接质量。
3
In the depth direction, the initiated ESFCs grew perpendicular to the loading axle first and then to be inclined to the direction perpendicular to the material columnargrain structure formation.