scholarly journals Experimental and Numerical Studies on Preparation of Thin AZ31B/AA5052 Composite Plates Using Improved Explosive Welding Technique

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1023
Author(s):  
Qi Wang ◽  
Xuejiao Li ◽  
Biming Shi ◽  
Yong Wu
Keyword(s):  
Explosive Welding ◽  
Welding Process ◽  
Composite Plates ◽  
Mechanical Tests ◽  
Extreme Condition ◽  
Welding Parameters ◽  
Interfacial Behavior ◽  
Microstructure Observation ◽  
Bonding Properties ◽  
Welding Technique

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.

Reasearch on Titanium Plate and Steel Plate in Explosive Welding Process Engineering

2012 ◽  
Vol 170-173 ◽  
pp. 3228-3236
Author(s):  
Ping Huang ◽  
Ning Xiong Wang ◽  
Lan Hua Zhou
Keyword(s):  
Explosive Welding ◽  
Steel Plate ◽  
Welding Process ◽  
Base Plate ◽  
National Standard ◽  
Welding Parameters ◽  
Titanium Plate ◽  
Composite Board ◽  
Steel Composite ◽  
Cladding Plate

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)

Experiment and Simulation of Influence of Welding Parameters on Temperature in Friction Stir Welding

2010 ◽  
Vol 44-47 ◽  
pp. 76-80
Author(s):  
Lei Wang ◽  
Jian Jun Zhu
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Welding Process ◽  
Welding Parameters ◽  
Fem Model ◽  
Friction Stir ◽  
Model Of Friction ◽  
Welding Technique ◽  
Good Agreement

Temperature distribution is the foundation to study friction stir welding technique, influence of welding parameters on temperature was studied through experiment measurement on AA2024-T4 aluminum alloy plates. An instantaneous relative linear velocity based heat source was utilized to build the FEM model of friction stir welding process, good agreement was observed between the measured and simulated thermal profiles. FEM model was also utilized to study effect of welding parameters on temperature distribution.

Effects of Vibration Energy Input on Stress Concentration in Weld and Heat-Affected Zone of S355J2 Steel

2010 ◽  
Vol 165 ◽  
pp. 73-78 ◽  
Author(s):  
Aurimas Jurčius ◽  
Algirdas Vaclovas Valiulis ◽  
Olegas Černašejus
Keyword(s):  
Residual Stresses ◽  
Heat Affected Zone ◽  
Mechanical Vibration ◽  
Welding Process ◽  
Diffraction Method ◽  
Mechanical Tests ◽  
Welding Parameters ◽  
X Ray Diffraction ◽  
Metal Structures ◽  
X Ray

The existence of residual stresses induced by the welding process is an important reason of cracking and distortion in welded metal structures that may affect the fatigue life and dimensional stability significantly [1]. Heat treatment is one of the traditional methods to relieve the residual stresses. But it is often limited by the manufacturing condition and the size of the structures. In this paper a procedure called vibratory stress relief (VSR) is discussed. VSR is the process to reduce and re-distribute the internal residual stresses of welded structures by means of weldment mechanical vibration during welding. Parameters of VSR procedure are described in the paper. Residual stresses on weld bead are measured in three different specimens by X-ray diffraction method. Mechanical tests of welded specimens were also performed with purpose to evaluate VSR effect in weld metal and heat affected zone (HAZ).

Transition Joints of Aluminum and Magnesium Alloy Made by Underwater Explosive Welding Technique

2012 ◽  
Vol 706-709 ◽  
pp. 757-762 ◽  
Author(s):  
Palavesamuthu Manikandan ◽  
Joo Noh Lee ◽  
Kotaro Mizumachi ◽  
Seyed Hadi Ghaderi ◽  
Akihisa Mori ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Kinetic Energy ◽  
Energy Loss ◽  
Explosive Welding ◽  
Microstructural Characterization ◽  
Welding Parameters ◽  
Melting Layer ◽  
Kinetic Energy Loss ◽  
Welding Technique

In this study, aluminum alloy A5052 and magnesium alloy AZ31 were joined by conventional parallel setup of explosive welding and underwater explosive welding. Microstructural characterization of conventional welded joints revealed a characteristic wave formation with vortices and contact surface melting layer containing intermetallics. In order to reduce the vortices and melting layer, underwater explosive welding was used. The welding parameters are regulated to reduce the kinetic energy loss during collision. The low kinetic energy loss in underwater explosive welding resulted in the formation of small waves with less vortices and no melting layer.

Microstructure and Characterization of Ti-Al Explosive Welding Composite Plate

2021 ◽  
Author(s):  
Zhi-xiong Bi ◽  
Xue-jiao Li ◽  
Ting-zhao Zhang ◽  
Quan Wang ◽  
Kai Rong ◽  
...  
Keyword(s):  
Intermetallic Compounds ◽  
Transition Layer ◽  
Composite Plate ◽  
Explosive Welding ◽  
Welding Process ◽  
Composite Plates ◽  
Base Plate ◽  
Optical Microscope ◽  
Interface Temperature ◽  
Al Composite

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.

scholarly journals Evaluation of Mechanical Properties and Microstructure of AA3003,AA6082and AA64430 Aluminum Under Friction Stir

2019 ◽  
Vol 8 (6S4) ◽  
pp. 131-137
Keyword(s):  
Welding Process ◽  
Welding Parameters ◽  
Warm Temperature ◽  
Mechanical Assembly ◽  
Affected Area ◽  
Friction Stir ◽  
Time Table ◽  
Practical Nature ◽  
Welding Technique ◽  
Lathe Tool

Aluminum mixes are a for the maximum part top notch choice for diminishing the rate, weight overriding steels in one in all a type packages and Friction Stir Welding technique is a monetarily sharp and a a hit approach. Scouring combination welding is a strong kingdom joining technique that makes use of a non-consumable turning welding tool to make plastic deformation and frictional warm temperature on the region of the welding; subsequently, the fabric that is inside the sturdy country is stricken by the route of movement of a joint. Disintegration combo welding is all around used for joining Al mixes for marine car, flying and various employments of corporation centrality. This examination is to get the parameters which can be best for the substances beneath thoughts, to look into the Heated Affected place (HAZ), Thermo – Mechanical Affected area (TMAZ) and Nugget region (NZ) other than to bear in mind the issues taking area inside the midst of welding process thru making use of unique parameters picked, draw close the little scale important changes and mechanical houses of disintegration mixture welding of varied aluminum joints approximately thickness is four mm, the aluminum disparate joints (AA3003-AA64430), (AA3003-6082) and (AA64430- AA6082) have been completed beneath a comparative welding parameters are 2000 rpm (rotational pace) and 11 mm/min (transverse speed) on vertical coping with machine. Wherein square mechanical assembly is used. The gadgets are created on a Lathe tool. This take a look at develops the welding time table and approach parameters for palatable welds AA3003-AA6082- AA64430 aluminum the use of tool H13 chrome steel. After the components are welded through welding, outstanding preliminary of practical nature are executed on the components which can be welded which includes the power, Fatigue check, Hardness take a look at, microstructure bear in mind.

Numerical study of Ti/Al/Mg three-layer plates on the interface behavior in explosive welding

2017 ◽  
Vol 24 (6) ◽  
pp. 833-843 ◽  
Author(s):  
Ruifeng Liu ◽  
Wenxian Wang ◽  
Tingting Zhang ◽  
Xiaodan Yuan
Keyword(s):  
Shear Stress ◽  
Plastic Strain ◽  
Explosive Welding ◽  
Numerical Study ◽  
Welding Process ◽  
Composite Plates ◽  
Maximum Pressure ◽  
Physical Parameters ◽  
Effective Plastic Strain ◽  
Collision Point

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.

scholarly journals The Use of Fiberglass and Ceramic Cylinders to Support the Root Pass in C-Steel Welds with a Double-V Groove

2015 ◽  
Vol 20 (3) ◽  
pp. 359-366
Author(s):  
Ricardo Fernandes Gurgel ◽  
Ronaldo Pinheiro da Rocha Paranhos
Keyword(s):  
Carbon Steel ◽  
Welding Process ◽  
Metallurgical Industry ◽  
Travel Speed ◽  
Ceramic Fiber ◽  
Great Promise ◽  
Welding Parameters ◽  
Process Variables ◽  
Steel Welds ◽  
Welding Technique

Abstract The aim of this work is to evaluate the effectiveness of fiberglass and ceramic fiber cylinders as root-pass weld backing for a double-V groove in 16 mm-thick carbon steel. Three different cylinder diameters were tested: 4.8, 9.5 mm (fiberglass) and 6.4 mm (ceramic fiber). The welding process used was GMAW. The welding technique and the following process variables were investigated: root opening, current and travel speed. The results show that cylindrical fiberglass and ceramic fiber backings not only have excellent refractory properties, but also seal the root opening and contain the weld pool sufficiently to produce a root bead free of discontinuities and with a satisfactory shape and geometry. Working points were defined, together with a possible operating range for the welding parameters. It was concluded that cylindrical fiberglass and ceramic fiber weld backings hold great promise for use in root-pass welds in double-V grooves in applications in the naval and metallurgical industry.

Effects of bottom plate in friction stir welding of AA6061-T6

2020 ◽  
Vol 118 (1) ◽  
pp. 108
Author(s):  
M.A. Vinayagamoorthi ◽  
M. Prince ◽  
S. Balasubramanian
Keyword(s):  
Mechanical Properties ◽  
Axial Load ◽  
Weld Zone ◽  
Welding Process ◽  
Bottom Plate ◽  
Welding Parameters ◽  
Nugget Zone ◽  
Friction Stir ◽  
Weld Joints ◽  
Fine Grain

The effects of 40 mm width bottom plates on the microstructural modifications and the mechanical properties of a 6 mm thick FSW AA6061-T6 joint have been investigated. The bottom plates are placed partially at the weld zone to absorb and dissipate heat during the welding process. An axial load of 5 to 7 kN, a rotational speed of 500 rpm, and a welding speed of 50 mm/min are employed as welding parameters. The size of the nugget zone (NZ) and heat-affected zone (HAZ) in the weld joints obtained from AISI 1040 steel bottom plate is more significant than that of weld joints obtained using copper bottom plate due to lower thermal conductivity of steel. Also, the weld joints obtained using copper bottom plate have fine grain microstructure due to the dynamic recrystallization. The friction stir welded joints obtained with copper bottom plate have exhibited higher ductility of 8.9% and higher tensile strength of 172 MPa as compared to the joints obtained using a steel bottom plate.

Sign in / Sign up

Export Citation Format

Share Document