Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method

Hong-xiang Li; Xin-yu Nie; Zan-bing He; Kang-ning Zhao; Qiang Du; Ji-shan Zhang; Lin-zhong Zhuang

doi:10.1007/s12613-017-1534-y

Volume 24 Issue 12

Dec. 2017

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文章导航 > 矿物冶金与材料学报（英文） > 2017 > 24(12): 1412-1423

Hong-xiang Li, Xin-yu Nie, Zan-bing He, Kang-ning Zhao, Qiang Du, Ji-shan Zhang, and Lin-zhong Zhuang, Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1412-1423. https://doi.org/10.1007/s12613-017-1534-y

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Hong-xiang Li, Xin-yu Nie, Zan-bing He, Kang-ning Zhao, Qiang Du, Ji-shan Zhang, and Lin-zhong Zhuang, Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method, Int. J. Miner. Metall. Mater., 24(2017), No. 12, pp. 1412-1423. https://doi.org/10.1007/s12613-017-1534-y

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研究论文Open Access

Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
SINTEF Materials and Chemistry, Pb. 124 Blindern, NO-0314 Oslo, Norway
IJmuiden Technology Centre, Tata Steel Research & Development, 1970 CA IJmuiden, The Netherlands

通讯作者:
Hong-xiang Li E-mail: hxli@skl.ustb.edu.cn

中文摘要

Ti-6Al-4V/Al7050 joints were fabricated by a method of insert molding and corresponding interfacial microstructure and mechanical properties were investigated. The interfacial thickness was sensitive to holding temperature during the first stage, and a good metallurgical bonding interface with a thickness of about 90 μm can be obtained at 750℃. X-ray diffraction, transmission electron microscopy, and thermodynamic analyses showed that the interface mainly contained intermetallic compound TiAl₃ and Al matrix. The joints featured good mechanical properties, i.e., shear strength of 154 MPa, tensile strength of 215 MPa, and compressive strength of 283 MPa, which are superior to those of joints fabricated by other methods. Coherent boundaries between Al/TiAl₃ and TiAl₃/Ti were confirmed to contribute to outstanding interfacial mechanical properties and also explained constant fracture occurrence in the Al matrix. Follow-up studies should focus on improving mechanical properties of the Al matrix by deformation and heat treatment.

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Research ArticleOpen Access

Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method

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Abstract

Abstract

Ti-6Al-4V/Al7050 joints were fabricated by a method of insert molding and corresponding interfacial microstructure and mechanical properties were investigated. The interfacial thickness was sensitive to holding temperature during the first stage, and a good metallurgical bonding interface with a thickness of about 90 μm can be obtained at 750℃. X-ray diffraction, transmission electron microscopy, and thermodynamic analyses showed that the interface mainly contained intermetallic compound TiAl₃ and Al matrix. The joints featured good mechanical properties, i.e., shear strength of 154 MPa, tensile strength of 215 MPa, and compressive strength of 283 MPa, which are superior to those of joints fabricated by other methods. Coherent boundaries between Al/TiAl₃ and TiAl₃/Ti were confirmed to contribute to outstanding interfacial mechanical properties and also explained constant fracture occurrence in the Al matrix. Follow-up studies should focus on improving mechanical properties of the Al matrix by deformation and heat treatment.
- interfacial microstructure;
- interfacial bonding mechanism;
- mechanical properties;
- insert molding method;
- coherent boundaries;
- Ti/Al joints

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Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method

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Interfacial microstructure and mechanical properties of Ti-6Al-4V/Al7050 joints fabricated using the insert molding method

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