双面水下搅拌摩擦加工双相不锈钢的多尺度强度-延性协同效应

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2025-09-28 DOI:10.1016/j.ijmecsci.2025.110898

Renhao Wu , Peihao Geng , Fujun Cao , Zaigham Saeed Toor , Shi Woo Lee , Yifu Shen , Shuhui Li , Hyoung Seop Kim

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引用次数: 0

摘要

传统的热机械加工通常会破坏金属材料的临界微观结构平衡，导致晶粒细化后的力学劣化，给制造、设备和应用带来挑战。介绍了一种新型的异步双面水下搅拌摩擦处理（DUFSP）工艺，该工艺可同时提高双相不锈钢的强度和延展性（屈服强度为885 MPa，均匀伸长率为28.9%）。α-铁素体和γ-奥氏体（~ 1:1）的不连续和连续动态再结晶耦合是晶粒细化和获得双峰异质结构的稳定双相比的关键。通过综合实验表征和多尺度模拟，包括耦合欧拉和拉格朗日方法和非局部晶体塑性建模，深入分析了DUFSPed双相不锈钢的热-力学行为、显微组织演变和多尺度变形机理，阐明了DUFSPed双相不锈钢的工艺-显微组织-力学性能之间的联系。这项工作证明了DUFSP策略在生产高性能金属方面的有效性，在汽车、建筑、钻井平台和石化等行业具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Multiscale strength-ductility synergy of double-sided underwater friction stir processed duplex stainless steel

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Multiscale strength-ductility synergy of double-sided underwater friction stir processed duplex stainless steel

Conventional thermomechanical processing often disrupts the critical microstructure balance of metallic materials, leading to mechanical deterioration despite grain refinement, presenting challenges in manufacturing, equipment, and application. This study introduces a novel asynchronous double-sided underwater friction stir processing (DUFSP) technique which achieves simultaneous strength-ductility enhancement (yield strength of 885 MPa and uniform elongation of 28.9%) in duplex stainless steel. Coupled discontinuous and continuous dynamic recrystallizations in α-ferrite and γ-austenite (∼1:1 ratio) grains are crucial for grain refinement and stable dual-phase ratio for obtaining bimodal heterostructure. Through integrated experimental characterizations and multiscale simulations, including the Coupled Eulerian and Lagrangian method and non-local crystal plasticity modeling, thermo-mechanical behavior, microstructural evolution, and multiscale deformation mechanisms were thoroughly analyzed, clarifying the linkage of process-microstructure-mechanical property of DUFSPed duplex stainless steel. This work demonstrates the effectiveness of DUFSP strategy for producing high-performance metals, with potential applications in industries, such as automotive, construction, drilling platform, and petrochemicals.

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来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.