Abstract
The Ti/Al laminate composites were prepared by hot pressing to investigate the forming performance due to the corresponding potential applications in both the aerospace and auto industry. The bonding interface morphology and element distributions were characterized by SEM and EDS. The phase constituent was detected by XRD. It was observed that these composites presented good bonding interfaces between Ti and Al layers, and no low-sized voids and intermetallic compounds formed at the interface. In addition, the formability of these laminate composites was studied by the uniaxial tension tests, the limit drawing ratio (LDR) and the forming limit curve (FLC) experiments, respectively. The results indicated that the flow stress increased along with the strain rate increment. A constitutive equation was developed for deformation behavioral description of these laminate composites. The LDR value was 1.8, and the most susceptible region to present cracks was located at the punch profile radius. The forming limit curve of the laminate composites was located between the curves of titanium and aluminum and intersected with the major strain line at approximately 0.31. The macroscopic cracks of the FLC sample demonstrated a saw-toothed crack feature.
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The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (No. 51475231), a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Funding of Jiangsu Innovation Program for Graduate Education (No. KYLX_0263), Foundation of Graduate Innovation Center in NUAA (kfjj20150606) and the Fundamental Research Funds for the Central Universities (No. 20150027).
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Qin, L., Wang, H., Cui, S. et al. Characterization and Formability of Titanium/Aluminum Laminate Composites Fabricated by Hot Pressing. J. of Materi Eng and Perform 26, 3579–3587 (2017). https://doi.org/10.1007/s11665-017-2785-5
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DOI: https://doi.org/10.1007/s11665-017-2785-5