上海交通大学学报 ›› 2025, Vol. 59 ›› Issue (8): 1181-1191.doi: 10.16183/j.cnki.jsjtu.2024.260

• 机械与动力工程 • 上一篇    下一篇

淬火分配钢成形极限实验与晶体塑性模拟

杨浩1, 唐伟琴2()   

  1. 1.合肥通用机械研究院有限公司, 合肥 230061
    2.上海交通大学 机械与动力工程学院, 上海 200240
  • 收稿日期:2024-07-02 修回日期:2024-08-19 接受日期:2024-09-04 出版日期:2025-08-28 发布日期:2025-08-26
  • 通讯作者: 唐伟琴 E-mail:weiqint@sjtu.edu.cn
  • 作者简介:杨 浩(1992—),工程师,从事金属材料塑性力学和氢脆研究.
  • 基金资助:
    合肥通用机械研究院有限公司博士科技基金项目(2023010792)

Experiment and Crystal Plasticity Simulation of Forming Limit of Quenching Partitioning Steel

YANG Hao1, TANG Weiqin2()   

  1. 1. Hefei General Machinery Research Institute Co., Ltd., Hefei 230061, China
    2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2024-07-02 Revised:2024-08-19 Accepted:2024-09-04 Online:2025-08-28 Published:2025-08-26
  • Contact: TANG Weiqin E-mail:weiqint@sjtu.edu.cn

摘要:

淬火分配(QP)钢因塑性变形过程会诱发马氏体相变,因而具有高强度和高延伸率的特点,但其成形性能目前尚未明确.通过Nakajima实验获得了QP1180钢板在不同应变路径下的极限应变,采用考虑相变的晶体塑性有限元模型耦合Marciniak-Kuczynski理论(CPFEM-PT-MK),分析了织构演化和相变对QP1180钢板成形极限的影响.结果表明:当应变路径ζ=0.1时,QP1180钢板的极限主应变最低,CPFEM-PT-MK模型能够较好地预测QP1180钢板的成形极限;不同应变路径下,QP1180钢各相的织构演化存在明显差异,考虑织构演化时,其成形极限更高;当不发生相变时,极限主应变最低点在应变路径ζ=0位置,与发生相变时明显不同.此外,相变并不总是提高QP1180的成形极限,其效果与应变路径有关.

关键词: 晶体塑性有限元, 马氏体相变, Marciniak-Kuczynski理论, 织构演化, 成形极限

Abstract:

Quenching-partitioning (QP) steel combines ultrahigh strength with good ductility due to the martensitic transformation during plastic deformation. However, the formability of the QP1180 steel remains unclear. In this paper, the ultimate strains of the QP1180 steel under different strain paths are obtained through Nakajima experiment. The effects of the texture evolution and phase transformation on the forming limit of QP1180 steel are analyzed by using a crystal plastic finite element model coupled with the Marciniak-Kuczynski theory (CPFEM-PT-MK). The results show that the ultimate principal strain of QP1180 steel is the lowest under the strain path ζ=0.1, and the established CPFEM-PT-MK model successfully predicts the forming limit of the QP1180 steel sheet. The texture evolutions of the constituent phases in the QP1180 steel are different under various strain paths. According to the simulation, the texture evolutions enhance the forming limit of the QP1180 steel under various strain paths. Without phase transformation, the minimum limited major strain of the QP1180 steel is located at the strain path of ζ=0, which is significantly different from that when phase transformation occurs. Furthermore, the phase transition, related to the specific strain path, does not always enhance the forming limit of the QP1180 steel.

Key words: crystal plasticity finite element, martensitic transformation, Marciniak-Kuczynski (MK) theory, texture evolution, forming limit

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