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Effect of Texture on the Cold Cracking in Weld Zone of T23 Steel

机译：织构对T23钢焊接区冷裂纹的影响

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Y-slit welded joints without preheating were used to prepare the cold cracks in T23 steel. Then the effect of texture on the cold cracking was studied from the views of macrotexture and microtexture. The results showed that the propagation path of the cold cracks was strongly affected by the macrotexture of the columnar grain structure after solidification. The fracture direction was changed at almost light-etched columnar grain but within each columnar grain an average fracture direction was maintained. The crack finally took the same initial direction before meeting another light-etched columnar grain. The strain distribution obtained by electron backscattered diffraction (EBSD) showed that different crystallography of the columnar grain induced large strain concentration, which led to the big angle transition of the main crack. In addition, transform texture, also named as microtexture in this study, had a large effect on the exact propagation paths of the cold cracks. The cold cracks propagated along lath boundaries which were almost parallel to {011}_(α) plane.
机译：没有预热的Y型缝焊接接头用于制备T23钢的冷裂纹。然后从宏观纹理和微观纹理的角度研究了织构对冷裂纹的影响。结果表明，凝固后柱状晶粒组织的宏观组织对冷裂纹的扩展路径有很大的影响。断裂方向在几乎被光蚀刻的柱状晶粒处改变，但是在每个柱状晶粒内保持平均断裂方向。最终，裂纹遇到了相同的初始方向，然后遇到了另一道光蚀刻的柱状晶粒。通过电子反向散射衍射（EBSD）获得的应变分布表明，柱状晶粒的不同晶体学引起较大的应变集中，从而导致主裂纹的大角度转变。此外，在本研究中，变形纹理（也称为微纹理）对冷裂纹的精确传播路径有很大影响。冷裂纹沿着几乎平行于{011} _（α）平面的板条边界扩展。

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