Transactions of Materials and Heat Treatment

Title：Bonding mechanism and mechanical properties of rolled multilayered composite sheet Al-Mg-Ti

Authors： Jiang Li Liu Hui

Unit： Xinjiang Vocational University Xinjiang Career Technical College

KeyWords： metal multilayered composite composite rolling Al-Mg-Ti composite sheet bonding strength of interfacial zone fracture

ClassificationCode：TG335.8

year,vol(issue):pagenumber：2017,42(2):150-155

Abstract：

The composite sheet 6061/AZ31/Ti-6Al-4V/AZ31/6061 was produced by hot roll-bonding process, and the bonding mechanism, mechanical properties and fracture characteristics were analyzed by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and tensile machine. The results show that when the total deformation reaches 40% or more, neck or fracture occurs at the layer Ti-6Al-4V because of further deformation, and when the rolling temperature reaches 420 ℃, the intermetallic compound of Al3Mg2 occur at the interfacial zone 6061/AZ31 resulting in fraction during the tensile-shear test, and the bonding strength of composite sheet will be decreased. However, the composite sheet Al-Mg-Ti with excellent comprehensive strength is obtained with rolling temperature 380 ℃ and reduction 30%. The fracture of interfacial zone Al-Mg and Mg-Ti occurs at the diffusion region of interfacial atoms, which shows brittle fracture characteristics for multilayered composite sheets rolled at different temperatares in the process of tensile shearing.

Funds：

新疆维吾尔自治区高校科研计划（XJEDU2014S074）

江莉（1979-），女，硕士，讲师

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