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首页> 外文期刊>Journal of Materials Engineering and Performance >An Exceptional Synergy of High Strength, Ductility and Toughness in a Gradient-Structured Low-Carbon Steel
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An Exceptional Synergy of High Strength, Ductility and Toughness in a Gradient-Structured Low-Carbon Steel

机译：梯度结构低碳钢中具有高强度，延展性和韧性的特殊协同作用

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Generally, the improvement in the strength comes at the cost of the ductility and toughness for most metallic materials. Here, an exceptional synergy of high strength (sigma(y)453.8MPa), ductility (epsilon(f)24.5%) and static toughness (U(r)115.0MJ/m(3)) is achieved in a low-carbon steel subjected to torsion deformation and annealing treatments, compared with that (sigma(y)282.4MPa, epsilon(f)27.3% and U(r)102.9MJ/m(3)) of its coarse-grained counterpart. The enhancement of mechanical properties is attributed to the formation of a specific gradient structure with a thickness of3mm, that is, the ferrite size increases while the volume fraction of the pearlite decreases continuously with the depth from the sample surface to the core. The strengthening and toughening mechanisms of the gradient-structured low-carbon steel are also discussed.
机译：通常，强度的改善以大多数金属材料的延展性和韧性的成本。 这里，在低碳钢中实现了高强度（Sigma（Y）453.8MPa），延展性（ε（F）24.5％）和静态韧性（U（R）115.0mJ / m（3））的特殊协同作用 与其粗粒对应物的扭转变形和退火处理进行扭转变形和退火处理，与（Sigma（Y）282.4MPa，Epsilon（F）27.3％和U（R）102.9mJ / m（3）））。 机械性能的增强归因于形成具有3mm的厚度的特定梯度结构，即，铁氧体尺寸在珠光体的体积分数随着从样品表面到芯的深度而连续降低。 还讨论了梯度结构的低碳钢的强化和增韧机制。

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