具有卓越强度-延性组合的全球三维梯度结构钢板

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-04-23 DOI:10.1016/j.msea.2025.148383

Yindong Shi , Aojie Zhang , Lina Wang , Tao Liu , Xiliang Zhang , Xinrui Yang , Zhenguo Xing , Yuntian Zhu

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引用次数: 0

摘要

全球梯度结构（GGS）从岩心到表面加工的扭转已被报道具有特殊的强度-延性组合。然而，由于其较低的轴对称性，很难将这种技术应用于片（板）样品。在这里，我们报告了一种新型的3D-GGS，它是在304不锈钢（304ss）板上使用循环扭转生产的。由于异质结构效应更明显，3D-GGS 304ss板材比GGS 304ss棒具有更好的强度-延性组合。拉伸试验过程中，激活了一种独特的相变诱导塑性（TRIP）效应，即先激活反向马氏体相变（α′→γ），经过一定应变后再转变为正向马氏体相变（γ→α′）。反向和正向TRIP效应都有助于提高延性。此外，3d结构还产生了异质变形诱导（HDI）加工硬化以保持延展性。这项工作开发了一种实用的方法来构建3D-GGS，以提高金属板和组件的综合性能，而不改变其几何形状。

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Global 3D-gradient-structured steel sheets with superior strength-ductility combination

Global gradient structures (GGS) from core to surface processed by twisting have been reported to possess exceptional strength-ductility combinations. However, it is hard to apply this technique to sheet (plate) samples because of their lower axial symmetry. Here, we report a novel 3D-GGS produced in a 304 stainless steel (304ss) sheet using cyclic twisting. The 3D-GGS 304ss sheets exhibited much better strength-ductility combinations than GGS 304ss rods due to their more pronounced heterostructural effects. During the tensile testing, a unique transformation-induced plasticity (TRIP) effect was activated in which reverse martensitic transformation (α′ → γ) was first activated, then transited to forward martensitic transformation (γ → α′) after some strain. Both the reverse and forward TRIP effects contributed to higher ductility. In addition, the 3D-structures also produced hetero-deformation induced (HDI) work hardening to retain ductility. This work developed a practical approach to constructing 3D-GGS to enhance integrated performances of metal sheets and components without changing their geometries.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.