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Ni中间层厚度对Zr-4/Nb/Ni/316SS扩散连接接头微观组织和性能的影响
作者单位:

天津大学

中图分类号:

TG457.1

基金项目:

国家自然科学基金优秀青年项目(52222511); 国家自然科学基金面上项目(52175357)资助


The Influence of Ni Interlayer Thickness on the Microstructure and Mechanical Properties of Zr-4/Nb/Ni/316SS Diffusion Bonded Joint
Author:
Affiliation:

Tianjin Key Laboratory of Advanced Joining Technology,Tianjin University

Fund Project:

The National Natural Science Foundation of China (Grant No. 52222511 and No. 52175357)

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    摘要:

    本文系统地研究了不同厚度Ni中间层对Zr-4/Nb/Ni/316SS扩散连接接头微观组织、力学性能以及腐蚀性能的影响,结果表明,接头的典型界面组织为Zr-4/β-(Zr, Nb)/Nb/Ni3Nb/Ni/316SS。接头的抗剪强度随着Ni中间层厚度的增加先上升后下降,当Ni中间层为30 μm厚时,接头抗剪强度达到最大值380 MPa。为明确Ni中间层厚度对接头力学性能的作用机制,本文提取了接头界面的微观组织结构特征,并使用Abaqus模拟了接头界面残余应力分布情况。结合模拟结果对不同接头的力学性能和断裂情况进行对比分析,发现Ni中间层越厚,缓解残余应力的效果越好,但过厚的Ni中间层由于其良好的延展性会降低接头抗剪强度。最后,采用全浸腐蚀法研究了接头的耐腐蚀性能,结果发现接头的腐蚀速率随着Ni中间层厚度的减小而降低,当Ni中间层厚度为10 μm时,接头的耐腐蚀性能最佳。综上所述,建议将Ni中间层厚度控制在10 μm-30 μm之间,以兼顾接头的力学性能和耐腐蚀性能。

    Abstract:

    This study systematically investigates the influence of Ni interlayer thickness on the microstructure, mechanical properties, and corrosion resistance of Zr-4/Nb/Ni/316SS diffusion bonded joints. The experimental results reveal that the typical interface microstructure of the joints consists of Zr-4/β-(Zr, Nb)/Nb/Ni3Nb/Ni/316SS. The shear strength of the joints initially increases and subsequently decreases with increasing Ni interlayer thickness, reaching a peak value of 380 MPa at an interlayer thickness of 30 μm. To elucidate the effect of Ni interlayer thickness on the mechanical properties, the microstructural characteristics of the joint interfaces were characterized, and Abaqus simulations were conducted to analyze the residual stress distribution across the interfaces. The comparative analysis of the mechanical properties and fracture behavior, combined with simulation results, indicates that while thicker Ni interlayers are more effective in alleviating residual stress, excessively thick interlayers lead to a reduction in shear strength due to their enhanced ductility. Additionally, the corrosion resistance of the joints was assessed using full immersion corrosion tests. The results indicate that the corrosion rate decreases with a reduction in Ni interlayer thickness, with the optimum corrosion resistance observed at an interlayer thickness of 10 μm. In conclusion, it is recommended that the Ni interlayer thickness be maintained between 10 μm and 30 μm to achieve a balance between mechanical properties and corrosion resistance.

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引用本文

李茜茹,张帆,牛市玉,王颖,杨振文. Ni中间层厚度对Zr-4/Nb/Ni/316SS扩散连接接头微观组织和性能的影响[J].稀有金属材料与工程,,().[Li Qianru, Zhang Fan, Niu Shiyu, Wang ying, Yang Zhenwen. The Influence of Ni Interlayer Thickness on the Microstructure and Mechanical Properties of Zr-4/Nb/Ni/316SS Diffusion Bonded Joint[J]. Rare Metal Materials and Engineering,,().]
DOI:10.12442/j. issn.1002-185X.20240495

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  • 收稿日期:2024-08-07
  • 最后修改日期:2024-09-03
  • 录用日期:2024-09-12
  • 在线发布日期: 2024-11-21