Abstract
The current work focuses on the effect of explosive ratio R on the comprehensive properties of Ti/Al clads manufactured via explosive welding. The lower and upper limits of explosive ratio, namely R1 and R2, were determined according to the R–δf (flyer plate thickness) welding window. Two TA2/1060 explosive cladding plates were successfully manufactured at the different explosive ratios. Microstructure investigation was conducted by optical microscopy (OM), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). The small wave bonding interface was observed at R1, where the vortex structure containing the ingot structure appeared periodically. The bonding interface presented a big wave bonding morphology and a locally continuous melting layer at R2. Many prolonged grains and adiabatic shear bands (ASBs) were found near the interface for a greater explosive load. Intermetallic compounds were formed in the bonding zones of the two plates. The thickness of element diffusion area increased with an increasing explosive ratio. Comparative tests of mechanical properties indicated that the tensile shear strength at R1 was higher. The microhardness, tensile strength, and bending performance of the two plates are similar and acceptable. Tensile fracture analysis indicated the fracture mode at R1 was ductile fracture, while the explosive cladding plate at R2 had mainly ductile fracture with quasi-cleavage fracture as the supplement.
Highlights
Titanium and its alloys have excellent comprehensive properties of outstanding corrosion resistance, low specific gravity, and high specific strength, which makes them widely applied in the chemical and shipbuilding industries [1,2]
Vecchio [8] reported that the specific stiffness of Ti-Al3 Ti metallic–intermetallic laminate (MIL) composite was twice that of steel, and the MIL composite could be used as damping elements or to absorb blast energy
The aim of the paper is to research the influence of the explosive ratio R on the comprehensive properties of Ti/Al clads manufactured via explosive welding
Summary
Titanium and its alloys have excellent comprehensive properties of outstanding corrosion resistance, low specific gravity, and high specific strength, which makes them widely applied in the chemical and shipbuilding industries [1,2]. Its relatively high price increases the production and application costs to a certain extent [3]. For 1xxx aluminum alloys, they have advantages in terms of production technology and price compared with other aluminum alloys [5]. It is of great value to combine the characteristics of Ti and Al. Ti/Al bimetal clads can be used in many harsh environments, such as aerospace engineering and the defense industry, because it has many unique advantages, such as heat resistance, oxidation resistance, and specific strength [6,7]. Replacing expensive titanium with relatively cheap aluminum can improve economic efficiency [9]
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