Wire arc additive manufacturing NiTi/Nb bionic laminated heterogeneous structure: Microsturcture evolution and mechanical properties

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2024-09-03 DOI:10.1016/j.matchar.2024.114326

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引用次数: 0

Abstract

In the aerospace industry and the medical field, there is a demand for materials that combine the functional properties of NiTi with the excellent ductility of Nb. However, creating high-strength interfaces between these two materials has been difficult due to their inherent differences in physical and chemical properties. In this study, a laminated heterogeneous structure (LHS) combining NiTi and Nb was prepared using wire arc additive manufacturing (WAAM) with different layer thickness ratios. The resulting microstructure of the NiTi/Nb LHS components consisted of a large amount of NiTi and β-Nb eutectic structures. This was due to the metallurgical bonding between the NiTi and Nb layers. The NiTi/Nb LHS components exhibited excellent compressive strength, measuring at 2607.6 ± 31 MPa. Additionally, the interface strength of the NiTi/Nb LHS component was remarkable, showing an ultimate tensile strength of 789.3 ± 8 MPa. The enhanced strength of the NiTi/Nb LHS component can be attributed to the gradient microstructure of the NiTi layer, which promoted heterogeneous plastic deformation generation. Furthermore, this study unveiled the relationship between the formation mechanism of the heterogeneous eutectic microstructure and the strength-ductility synergistic mechanism. As a result, this study provides an innovative approach for additive manufacturing in the strengthening of laminated multi-material interfaces.

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线弧快速成型镍钛/铌仿生层状异质结构：微观结构演变与力学性能

在航空航天工业和医疗领域，人们需要将镍钛的功能特性与铌的优异延展性相结合的材料。然而，由于这两种材料在物理和化学性质上的固有差异，在它们之间创建高强度界面一直是个难题。本研究采用线弧快速成型技术（WAAM），以不同的层厚比制备了镍钛和铌的层状异质结构（LHS）。镍钛/铌 LHS 组件的微观结构由大量镍钛和β-铌共晶结构组成。这是由于镍钛层和铌层之间的冶金结合造成的。镍钛/铌 LHS 组件表现出优异的抗压强度，测量值为 2607.6 ± 31 兆帕。此外，镍钛/铌 LHS 组件的界面强度也非常出色，极限拉伸强度为 789.3 ± 8 兆帕。镍钛/铌 LHS 组件强度的提高可归因于镍钛层的梯度微结构促进了异质塑性变形的产生。此外，本研究还揭示了异质共晶微观结构的形成机制与强度-电导率协同机制之间的关系。因此，本研究为增材制造强化层状多材料界面提供了一种创新方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.

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