应力超声滚压表面强化机理和抗疲劳性能研究

doi:10.3901/JME.2024.09.127

机械工程学报 ›› 2024, Vol. 60 ›› Issue (9): 127-136.doi: 10.3901/JME.2024.09.127

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应力超声滚压表面强化机理和抗疲劳性能研究

吴杰¹, 党嘉强², 李宇罡¹, 陈东¹, 安庆龙², 王浩伟¹, 陈明²

1. 上海交通大学金属基复合材料国家重点实验室上海 200240;
2. 上海交通大学机械系统与振动国家重点实验室上海 200240

收稿日期:2023-05-09 修回日期:2023-10-19 出版日期:2024-05-05 发布日期:2024-06-18
作者简介:吴杰，男， 1999 年出生。主要研究方向为铝基复合材料的超声滚压表面强化工艺。E-mail： wujie-21@sjtu.edu.cn;陈明(通信作者)，男， 1966 年出生，博士，教授，博士研究生导师。主要研究方向为先进制造工艺与装备、超精密加工与测量、高性能制造。E-mail： mchen@sjtu.edu.cn
基金资助:
国家自然科学基金资助项目(U1937208)。

Study on Strengthening Mechanism and Anti-fatigue Performance of Stress Ultrasonic Rolling

WU Jie¹, DANG Jiaqiang², LI Yugang¹, CHEN Dong¹, AN Qinglong², WANG Haowei¹, CHEN Ming²

1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240;
2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240

Received:2023-05-09 Revised:2023-10-19 Online:2024-05-05 Published:2024-06-18

摘要/Abstract

摘要： 从理论分析角度探讨了超声滚压与单轴拉伸弹性应力场耦合的基本原理，并通过有限元模拟和实验表征依次从数值仿真和实验角度对理论分析结果进行验证，从而发展了一种先进的表面机械强化新工艺—应力超声滚压，并将其成功应用于TiB2/2024和TiB2/7050铝基复合材料表面机械强化效果的增强和抗疲劳性能的提升。结果表明，相较于普通超声滚压，应力超声滚压对TiB2/2024和TiB2/7050铝基复合材料表层压缩残余应力峰值的提升可分别达到所施加单轴拉伸弹性应力水平的45%和70%，可将压缩残余应力影响层深度提升约100 μm，从而将两种复合材料样品的疲劳极限在普通超声滚压强化的基础上分别进一步提升6%和5%。

关键词: 应力超声滚压, 铝基复合材料, 有限元模拟, 实验表征, 疲劳

Abstract: The basic principle of coupling ultrasonic rolling with uniaxial tensile elastic stress field is discussed from the perspective of theoretical analysis, and the results of theoretical analysis are verified from the perspective of numerical simulation and experiment through finite element simulation and experimental characterization in turn. Thus, a new advanced surface mechanical strengthening process, stress ultrasonic rolling, is developed and successfully applied to enhance the surface mechanical strengthening effect and fatigue resistance of TiB2/2024 and TiB2/7050 aluminum matrix composites. Compared with ultrasonic rolling, the results showed that, after stress ultrasonic rolling, the peak compressive residual stresses in the surface layers of TiB2/2024 and TiB2/7050 aluminum matrix composites are increased by 45% and 70% of the applied uniaxial tensile elastic stress values, respectively, the depth of the layer affected by compressive residual stresses is increased by about 100 μm, and the fatigue limits of the two composite samples were further increased by 6% and 5%, respectively.

Key words: stress ultrasonic rolling, aluminum matrix composites, finite element simulation, experimental characterization, fatigue

中图分类号:

TG156

吴杰, 党嘉强, 李宇罡, 陈东, 安庆龙, 王浩伟, 陈明. 应力超声滚压表面强化机理和抗疲劳性能研究[J]. 机械工程学报, 2024, 60(9): 127-136.

WU Jie, DANG Jiaqiang, LI Yugang, CHEN Dong, AN Qinglong, WANG Haowei, CHEN Ming. Study on Strengthening Mechanism and Anti-fatigue Performance of Stress Ultrasonic Rolling[J]. Journal of Mechanical Engineering, 2024, 60(9): 127-136.

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应力超声滚压表面强化机理和抗疲劳性能研究

Study on Strengthening Mechanism and Anti-fatigue Performance of Stress Ultrasonic Rolling

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