Mechanical Properties and Microstructure of Titanium-aluminum Laminated Composite Plates under Electrically Assisted Conditions

ZHAI Yihan; HUANG Tao; XING Binghui; ZHANG Chaomin; XIANG Nan; SONG Kexing

doi:10.3969/j.issn.1674-6457.2025.08.001

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (8) : 1-11. DOI: 10.3969/j.issn.1674-6457.2025.08.001

Mechanical Properties and Microstructure of Titanium-aluminum Laminated Composite Plates under Electrically Assisted Conditions

ZHAI Yihan¹, HUANG Tao^1,2,3,*, XING Binghui⁴, ZHANG Chaomin¹, XIANG Nan¹, SONG Kexing⁵

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Abstract

Based on titanium-aluminum laminated composite plates, the work aims to study the mechanical properties and microstructure of titanium-aluminum metal laminated composite plates under electrically assisted conditions, to further enrich the forming theory and technology of heterogeneous metal laminated plates with research results and lay a foundation for improving the forming quality of components and tapping their forming potential. Electrically assisted tensile tests were performed under different current densities and duty cycles, and EBSD microstructural characterization was conducted on samples in various states to study the mechanical properties and microstructural evolution of titanium-aluminum laminated composite plates under electrically assisted conditions. Electrically assisted stretching reduced the deformation resistance and elongation of titanium-aluminium laminated composite plates under non-thermal and Joule heating effects. However, when the current density was 6 A/mm², the mechanical properties of titanium-aluminium laminated composite plates under electrically assisted conditions showed basically unchanged flow stress and increased elongation compared with those under room temperature stretching. This indicated that the selection of appropriate current parameters could enhance the material plasticity without reducing the strength. During electrically assisted stretching, the current could affect the dislocation structure and reduce the dislocations generated by the Frank-Read dislocation source and the lattice distortion degree near the Frank-Read dislocation source, thus reducing the dislocation density. At the same time, the effect of pulsed current could increase the nucleation rate of the material crystallization process at lower temperatures, which promoted the occurrence of recrystallization. The effect mechanisms of pulsed current on the deformation behavior of titanium-aluminum layered composite plates are explored from the perspectives of mechanical properties and microstructure, providing a theoretical basis for optimizing the processing techniques of materials, improving material utilization, and enhancing the performance of final products.

Key words

electrically assisted forming / Ti-Al laminated composite plate / mechanical properties / microstructure / electron backscatter diffraction (EBSD)

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ZHAI Yihan, HUANG Tao, XING Binghui, ZHANG Chaomin, XIANG Nan, SONG Kexing. Mechanical Properties and Microstructure of Titanium-aluminum Laminated Composite Plates under Electrically Assisted Conditions[J]. Journal of Netshape Forming Engineering. 2025, 17(8): 1-11 https://doi.org/10.3969/j.issn.1674-6457.2025.08.001

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Funding

The National Natural Science Foundation of China (52175314, 51875176); Key Scientific Research Projects of Colleges and Universities in Henan Province (24A430015); Henan Provincial Key Research and Development Program (231111231700); Scientific and Technological Innovation Teams of Universities in Henan Province (25IRTSTHN022); Zhongyuan Talent Support Program ([2023]11); Zhongyuan Scholar Workstation Funded Project (214400510028)