Microstructure and Characterization of Ti-Al Explosive Welding Composite Plate

Author(s):  
Zhi-xiong Bi ◽  
Xue-jiao Li ◽  
Ting-zhao Zhang ◽  
Quan Wang ◽  
Kai Rong ◽  
...  

Abstract In order to study the interface characteristics and microstructure formation of Ti-Al composite plate, explosive welding was carried out with TA2 titanium as the fly plate and 5083 aluminums as the base plate. Optical microscope and electron microscope were used to analyze the microstructure of intermetallic compounds. SPH method was used to simulate the welding process of composite plates. The formation conditions and initial defects of intermetallic compounds were analyzed. The results show that most of the melted metal in the wave-front stays in the wave-waist region, and there was a relative velocity difference between the vortex and the titanium tissue, which led to the existence of small pieces of fragmentation. The outer layer of the vortex had higher velocity than the inner layer. The formation of Ti3Al, its antioxidant capacity wound lead to the formation of cracks. The temperature of outer vortex was higher than that of inner vortex, and the vortex has a transition layer of 5 μm, which is thinner than the transition layer of 8 μm between cladding plate and substrate. The jet was mostly composed of aluminum metal, and the interface jet velocity reaches 3000 m·s-1 and the interface temperature reaches up to 2100 K. Compared with the molten metal in the wave-back vortex, the jet temperature at the interface was higher, resulting in a thicker transition layer at the bonding surface. The residual stress at the interface wound cause the density of the material to increase.

2012 ◽  
Vol 170-173 ◽  
pp. 3228-3236
Author(s):  
Ping Huang ◽  
Ning Xiong Wang ◽  
Lan Hua Zhou

The experiment was carried out and a good quality titanium-steel composite plate was obtained. In the experiment, the base plate made of Q235A and cladding plate made of TA2 titanium plate with thickness 2mm were used and explosive welding parameters were chose reasonably well which are the explosive welding clearance (h) is equal to between 0.4 to 0.6cm and the density of blasting agent in cladding plate (Wc) is equal to 6.2g/cm2. The designed titanium-steel composite board with 500×500×14mm can meet the demand in the requiement of ltrasonic inspection stretching inflection anti-shearing property in one type of National Standard of titanium-steel composite board (GB/T8547-2006)


2017 ◽  
Vol 753 ◽  
pp. 188-193
Author(s):  
Nan Zhou ◽  
Jing Jiang ◽  
Kui Tang ◽  
Song Ze Tang

In order to study the explosive welding experimental fabrication technology of multi-layer dissimilar metal plates and the quality of bonding interface, three-layer steel/aluminum/steel composite plates with different thickness distributions were fabricated using the method of explosive welding when their total thicknesses remained same (total 5 mm). Then the stereomicroscope was adopted to investigate the shape of bonding interface and the formed mechanism was also analyzed. In addition, the micro-hardness (Vickers hardness, Hv) distribution of the composite plate in the thickness direction was studied by a low load Vickers hardness tester. The results show that the method of explosive welding can be used to fabricate three-layer steel/aluminum/steel dissimilar metal plates successfully. Meanwhile, wave bonding interface was formed between steel fly plate and aluminum middle plate, straight bonding interface was formed between aluminum middle plate and steel base plate. The maximum Hv value of welded plate appears at the bonding interface with high bonding strength. The bonding strength of both two kinds of welded interface was considered sufficient, which offers experimental support for the explosive welding of multi-layer plates.


2013 ◽  
Vol 747-748 ◽  
pp. 346-351 ◽  
Author(s):  
Chang Zeng Luo ◽  
Wei Liang ◽  
Xian Rong Li ◽  
Ya Jun Yao

In this study, 5052/AZ31B/5052 composite plates were fabricated by two-pass hot rolling, under the rolling parameters 623 K/15 min/40% for the first pass and 673 K/10 min/50% for the second pass. The structure and element change in the zone of the joint interface were studied by means of optical microscope (OM), scanning electron microscope (SEM), and energy diffraction spectrum (EDS). The results showed that the bonding mode of the joint interface between AZ31B and 5052 alloy was metallic bonding after the first pass hot rolling, but the bonding mode of the finished composite plate appeared the distribution characteristic alternating with metallic bonding and metallurgical bonding. Two distinct intermediate layers including Mg17Al12and Al3Mg2can be clearly observed in the joint interface. During the second pass hot rolling, the AZ31B and 5052 layer were elongated along the rolling direction, while the Al3Mg2and Mg17Al12layers were up in the joint interface. After the tensile strength testing of the composite plate, the interface bonding appeared very well without any debonding.


2014 ◽  
Vol 926-930 ◽  
pp. 312-315
Author(s):  
Mian Jun Duan ◽  
Yao Hua Wang ◽  
Jin Hong ◽  
Cheng Fei Fan ◽  
Rui Ma

In this study, a 316L stainless steel sheet and Q345R steel ribs are cladded to be a bimetallic ribbed panel which is hardly be manufactured by normal processing technique. There are three key sections in the fabrication process: the parallel arrangement, optimization of the explosive welding parameter and the template filling and stripping. The bonding interfaces of the ribbed panel are observed and analyzed by means of mechanical test and optical microscope (OM). It is found that welding interface is wavy, and the bonding strength is higher than that of base plate.


Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1023
Author(s):  
Qi Wang ◽  
Xuejiao Li ◽  
Biming Shi ◽  
Yong Wu

In this work, an improved explosive welding technique was investigated to fabricate a thin Mg/Al plate, where an additional thin aluminum sheet was used as a buffer layer between the explosive and the Al plate, and the Mg plate was rigidly constrained by a steel plate to avoid excessive deformation. Moreover, the welding parameters were optimized using theoretical analysis and numerical simulation, and the interfacial behavior was simulated using the SPH method. The bonding properties of the achieved joints were investigated using microstructure observation and mechanical tests. It was concluded that this technique is an effective method for producing a thin Mg/Al composite plate. In both morphology observation and mechanical tests, an excellent bonding quality was confirmed. In addition, smoothed particle hydrodynamics (SPH) simulation revealed an extreme condition of local high temperature and plastic strain in the welding process, and the characteristic parameters of waves obtained using simulation are well congruous with the experiment.


2016 ◽  
Vol 723 ◽  
pp. 258-261
Author(s):  
Zhi Ling Wang

We used the Q345R/ composite panels by explosive composite method,and studied the microstructure and properties of the composite plate by the means of optical microscope and mechanical property test in this paper. We can see that the interface of explosive composite board is in a wave shape, the microstructure in the region next to the bonding interface of the composite plate consists of three parts: distorted grain area, fibrous zone and fine grained region. The composite explosive plate is still of high tensile strength and ductility, and its impact absorbing energy is to 68J, the hardness of the interface for the composite plate of 304 is higher and rise more remarkable than the base metal of Q345R.


2013 ◽  
Vol 743 ◽  
pp. 227-230 ◽  
Author(s):  
Xi Liang Chen ◽  
Qing Nan Shi

Cu/Al composites have the advantage of both copper and aluminum, i.e., the high electrical conductivity, high thermal conductivity, and low contact resistance of copper; the lightweight and corrosion resistant of aluminum. Roll welding is one common method to produce Cu/Al composite plates. The effects of rolling reduction ratio and annealing temperature on combined strength are analyzed by experiments. The results demonstrate that the combined strength increases with the increase of rolling reduction ratio, and at around 300°C the combined strength achieves the maximum value. The reason is then analyzed respectively. The results are helpful for understanding the Cu/Al combing mechanism, and are useful for improving the producing process of Cu/Al composite plates.


2019 ◽  
Vol 55 (14) ◽  
pp. 37
Author(s):  
WEI Yi ◽  
WANG Yongzhen ◽  
WANG Wenxian ◽  
ZHANG Tingting ◽  
YAN Zhifeng

2017 ◽  
Vol 898 ◽  
pp. 1283-1288
Author(s):  
Jia Wei Bao ◽  
Su Yuan Yang

1060Al/AZ31/1060Al composite plates were fabricated by explosive welding. The microstructure and properties of the composite plate after explosive welding were investigated. The results showed that all bonding interface had a wavy morphology. The wavelength and amplitude of the lower interface were larger than that of the upper interface. Diffusion layer occurred in both interfaces and the thickness were both approximate 4 μm. Adiabatic shear bands and twin structure were observed in AZ31. The shear bond strength of the lower interface was larger than that of the upper interface. Larger amplitude and wavelength of the waveform implied higher bonding strength.


2017 ◽  
Vol 24 (6) ◽  
pp. 833-843 ◽  
Author(s):  
Ruifeng Liu ◽  
Wenxian Wang ◽  
Tingting Zhang ◽  
Xiaodan Yuan

AbstractIn this study, a finite element model of the explosive welding process of three-layer plates composed of Ti/Al/Mg was established, and the interfacial behaviors of three-layer plates were researched. We investigated the influences that affect the quality of explosive bonding and explored the influence factors of variable physical parameters in the simulation. The finite difference engineering package AUTODYN with the smoothed particle hydrodynamics method has been used to model the collision in this work. The von Mises strength model was used to describe the behavior of Ti/Al/Mg composite plates. Wave morphology on the Al/Mg interface and straight morphology on the Ti/Al interface were produced in this study; meanwhile, jet phenomenon occurred obviously in the simulation process. The contours of velocity, pressure, shear stress, and effective plastic strain of Ti/Al/Mg were also discussed. The result of X-direction velocity showed a delay in time and location of collision point between the Ti/Al and the Al/Mg interface. The detonation point was the minimum pressure, and the collision point was the maximum pressure compared with other sections. The value of effective plastic strain must exceed a threshold to obtain a good bonding, and the shear stress was of opposite sign in the simulation.


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