The structure and mechanical properties under tension and impact bending of eleven batches of high-strength manganese-containing steels (Mn-steels) containing 0.09 to 0.14 wt.% Ti subjected to thermomechanical rolling were studied in the temperature range from –60 to +20 °С. It was found that the values of the coefficient of impact toughness anisotropy in the range of Ka = 2.0–4.9 increase at higher titanium content and decrease at higher aluminum content. The difference between ductile-to-brittle transition temperatures T50 and T34 for longitudinal and transverse KCV samples increases at higher contents of titanium, aluminum, sulfur, and carbon. This effect is caused by an earlier nucleation and growth of large dimples of ductile fracture around sizable inclusions preferentially located in the direction of rolling.

中文翻译：

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冲击韧性各向异性对热机械处理高强钢抗脆性断裂特性的影响

研究了 11 批含 0.09 至 0.14 wt.% Ti 的高强度含锰钢（Mn 钢）在 –60 至 +20 温度范围内进行热机械轧制的组织和力学性能。 °С。发现在 Ka = 2.0-4.9 范围内的冲击韧性各向异性系数值在较高的钛含量下增加，在较高的铝含量下减少。纵向和横向 KCV 样品的韧脆转变温度 T50 和 T34 之间的差异随着钛、铝、硫和碳含量的增加而增加。这种效应是由于在优先位于轧制方向的相当大的夹杂物周围的韧性断裂的大凹坑的较早成核和生长造成的。