scholarly journals Theoretical Analysis and Experimental Research into the Mechanical Properties of Al-Ti-Al Symmetrical Laminated Plate

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Xia Yang ◽  
Yingchao Ma ◽  
Dongsheng He ◽  
Xiaozhong Du ◽  
Rongjun Wang
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Diffusion Layer ◽  
Plate Theory ◽  
Laminated Plate ◽  
Surface Corrosion ◽  
Specific Strength ◽  
Specific Stiffness ◽  
Different Temperatures

In order to have both the surface corrosion resistance of aluminum alloy and the high specific strength characteristics of titanium alloy, titanium alloy TC4, and aluminum alloy 6061 can be used to make aluminum-titanium-aluminum (Al-Ti-Al) three-layer laminated plate by hot rolling. In this paper, the classical laminated plate theory was used to calculate the stiffness, specific stiffness, strength, and specific strength of the laminated plate. The results showed that when the coating rate of titanium alloy TC4 was 0.5, bending specific stiffness and bending specific strength were the minimum, but all other parameters increased with the increase of the coating rate of titanium alloy TC4. Therefore, in actual production, the coating rate of titanium alloy should be avoided being 0.5. Then, the rolling experiments of the Al-Ti-Al laminated plate were carried out with different temperatures, reduction rates, and thickness ratios. Finally, the tensile test and energy spectrum analysis of the laminated plate were carried out. The results showed that, with the increase of rolling temperature, the tensile strength, the extensibility, and the thickness of the diffusion layer increased; if the coating rate of titanium alloy TC4 was between 0.2 and 0.33, the mechanical properties, the bonding strength, and the thickness of the diffusion layer increased with the increase of the coating rate of titanium alloy TC4.

scholarly journals Study on Dynamic Mechanical Properties and Constitutive Model Construction of TC18 Titanium Alloy

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 44 ◽  
Author(s):  
Changming Zhang ◽  
Anle Mu ◽  
Yun Wang ◽  
Hui Zhang
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Flow Stress ◽  
Yield Strength ◽  
Constitutive Model ◽  
Testing Machine ◽  
Dynamic Mechanical Properties ◽  
Stress Strain ◽  
Dynamic Mechanical ◽  
Different Temperatures

In order to investigate the static and dynamic mechanical properties of TC18 titanium alloy, the quasi-static stress–strain curve of TC18 titanium alloy under room temperature was obtained by DNS 100 electronic universal testing machine (Changchun Institute of Mechanical Science Co., Ltd., Changchun, China). Meanwhile, the flow stress–strain curves under different temperatures and strain rates are analyzed by split Hopkinson pressure bar (SHPB) device with synchronous assembly system. On the basis of the two experimental data, the JC constitutive model under the combined action of high temperature and impact load is established using the linear least squares method. The results show the following: the yield strength and flow stress of TC18 titanium alloy increase slowly with the increase of the strain rate, and the strain value corresponding to the yield strength is reduced. With the increase of strain, the flow stress increases at first and then decreases at different temperatures. The strain value corresponding to the transition point rises with the temperature increase, and the corresponding stress value remains basically unchanged. With the increase of experimental temperature, the flow stress shows a downward trend, and the JC constitutive model can predict the plastic flow stress well.

Effect of brazing temperatures on microstructure and properties of TC4/Ti57Zr13Cu21Ni9/316L

2022 ◽  
Vol 119 (1) ◽  
pp. 106
Author(s):  
Mei Yang ◽  
Shuang Li ◽  
Xianju Zhang ◽  
Honglang Yang ◽  
Liping Nie ◽  
...  
Keyword(s):  
Solid Solution ◽  
Titanium Alloy ◽  
Shear Strength ◽  
Energy Dispersive Spectrometer ◽  
Nuclear Industry ◽  
Specific Strength ◽  
Tc4 Titanium Alloy ◽  
Average Shear Strength ◽  
Average Shear ◽  
Different Temperatures

Titanium alloy is an important metal material with excellent specific strength, which is widely used in aerospace field, nuclear industry, chemical medicine, and military industry. In order to investigate the connection conditions of TC4 titanium alloy and 316L stainless steel at different temperatures, the braze welding measurement with Ti57Zr13Cu21Ni9 filler metal was conducted in vacuum. The microstructure, morphology and phase of the joint were characterized by SEM (scanning electron microscope), EDS (Energy Dispersive Spectrometer) and XRD (X-ray diffraction), respectively. Microhardness and shear strength of the joint at room temperature and the bonding mechanism of TC4 and 316L were also investigated. The obtained results revealed that the main phases in the diffusion layer were Ti-based solid solution and Ti-Fe (TiFe and TiFe2) intermetallic compoundsands (IMCs) the center of the braze was mainly composed of Ti-Fe IMCs, (Ti, Zr)2(Ni, Cu), Ti-based solid solution. Additionally, the increase of brazing temperature firstly increased and then decreased the average shear strength with the maximum value of 133.9 MPa at 960 °C.

Roundness in Drilling of Low-Rigidity Workpiece

2017 ◽  
Vol 749 ◽  
pp. 46-51
Author(s):  
Masahiko Sato ◽  
Akihiro Fukuma ◽  
Kanae Yamamoto ◽  
Takashi Matsuno
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Stainless Steel ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Carbon Steel ◽  
Thrust Force ◽  
Longitudinal Direction ◽  
Roundness Error ◽  
Fixed End

This study described the effect of mechanical properties on the roundness of a drilled hole in the drilling of low-rigidity workpieces. A thin-thickness part workpiece model involving a beam plate structure fixed on both ends was used in the study. The effects of feed, workpiece length, distance from the fixed end to the drilling point, and mechanical properties of the workpiece on the roundness of the hole were investigated. The thrust force increased with feed and the roundness became worse with feed. The hole was enlarged in the longitudinal direction of the workpiece at the upper section of the hole. An increase in the workpiece length decreased the rigidity of the workpiece and deteriorated the roundness of the hole. The roundness error was extremely small when the drilling point was near the fixed end. Carbon steel, aluminum alloy, stainless steel, and titanium alloy were used as workpiece materials. The thrust force in the drilling of titanium alloy and stainless steel was considerably larger than that of the carbon steel and aluminum alloy. The roundness of the hole was worse in the drilling of titanium alloy and stainless steel than that in the drilling of carbon steel and aluminum alloy. Plastic deformation occurred in the workpieces made of titanium alloy and stainless steel, which is probably because the workpiece was yielded by the large thrust force. The value of the ratio of the thrust force in drilling to the Young’s modulus of the workpiece was used in evaluating the deflection of the workpiece and the roundness error of the hole in drilling.

scholarly journals Topological Design of a Lightweight Sandwich Aircraft Spoiler

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3225 ◽  
Author(s):  
Liu ◽  
Ou ◽  
He ◽  
Wen
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
High Performance ◽  
Lattice Structure ◽  
Weight Ratio ◽  
Bending Rigidity ◽  
Topological Design ◽  
Material Volume ◽  
3D Printing Technique

In this study, a lightweight sandwich aircraft spoiler (AS) with a high stiffness-to-weight ratio was designed. Excellent mechanical properties were achieved by the synthetic use of topology optimization (TO), lattice structure techniques, and high-performance materials, i.e., titanium alloy and aluminum alloy. TO was first utilized to optimize the traditional aircraft spoiler to search for the stiffest structure with a limited material volume, where titanium alloy and aluminum alloy were used for key joints and other parts of the AS, respectively. We then empirically replaced the fine features inside the optimized AS with 3D kagome lattices to support the shell, resulting in a lightweight sandwich AS. Numerical simulations were conducted to show that the designed sandwich AS exhibited good mechanical properties, e.g., high bending rigidity, with a reduction in weight by approximately 80% when compared with that of the initial design model. Finally, we fabricated the designed model with photosensitive resin using a 3D printing technique.

Effects of Heating Rate and Temperature Holding Time on Mechanical Behaviors of Aluminum Alloy

2007 ◽  
Vol 345-346 ◽  
pp. 33-36
Author(s):  
Chen Guang Huang ◽  
Si Ying Chen ◽  
Chunkui Wang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Heating Rate ◽  
Room Temperature ◽  
Thermal Softening ◽  
Holding Time ◽  
Mechanical Behaviors ◽  
Different Temperatures

In this paper, the mechanical properties of several aluminum alloys are obtained experimentally at different temperatures, from room temperature to about 4000C by using the Gleeble 1500 thermomechanical system. Besides, the thermal softening characteristics, effects of heating rate and temperature holding time are discussed in details. It is found that the strength of LF6, a kind of antirust aluminum alloy, is not sensitive to the heating rate (0.1-1000K/s) and temperature holding time (0-1h). However, the mechanical behaviors of other alloys depend on these factors very obviously. At last, these phenomena are discussed in the viewpoint of the microstructures and techniques of ageing strengthening of these alloys.

Evaluation of Weldability of Titanium Alloy Ti-6Al-4V and Aluminum Alloy 6061 Produced by Electron Beam Welding

2016 ◽  
Vol 879 ◽  
pp. 714-719 ◽  
Author(s):  
Petr Havlík ◽  
Jan Kouřil ◽  
Rudolf Foret ◽  
Ivo Dlouhy ◽  
Norbert Enzinger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Electron Beam Welding ◽  
Incident Beam ◽  
Intermetallic Phases ◽  
Ambient Atmosphere ◽  
Aluminum Alloy 6061 ◽  
Alloy 6061

Aluminum and titanium alloys are among the most important and the most frequently used construction materials due to their physical and mechanical properties. Especially in the automotive and aerospace industry these materials allow to reduce the weight of structure which leads to reducing fuel consumption and environment pollution. These materials are often used together which leads to problems with junction between these materials. In addition to the mechanical joints, there is an effort to produce quality welded joints. Series of works focused to welding of Al/Ti joints by conventional and nonconventional welding methods were published [1, 4, 5, 6, 7]. By reduction of dimensions of molten material is possible to reduce the amount of emerging intermetallic phases and welding defects. Electron beam welding appears as suitable method for welding Al/Ti joints because it allows production of very narrow welds. The benefit is also necessity to perform electron beam welding in vacuum which is required for decrease energy losses of incident beam and simultaneously prevents reaction of molten metal with ambient atmosphere. This paper is focused to determine of appropriate parameters for electron beam welding of heterogeneous welds of titanium alloy Ti-6Al-4V and aluminum alloy 6061. Metallographic evaluation, analysis of chemical and phase composition were performed on the test welds for purpose to describing present phases. On the selected welds was evaluated the influence of intermetallic phases on the mechanical properties. The obtained results will be used for further experiments focused to optimize the process of electron beam welding of Al/Ti alloys.

scholarly journals Effect of Angle Ply On The Mechanical Performance of Jute Fibre Woven Mat /Epoxy Composites With Varying Ageing Conditions

2021 ◽  
Author(s):  
Satheeshkumar S. ◽  
Sathishkumar T. P ◽  
Rajini Nagarajan ◽  
Navaneethakrishnan P. ◽  
Sikiru O. Ismail ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Plate Theory ◽  
Laminated Composites ◽  
Low Cost ◽  
Laminated Plate ◽  
Maximum Activation ◽  
Mechanical Strengths ◽  
Strength Retention ◽  
Composite Samples

Abstract The present work investigates the mechanical strengths retention and prediction of maximum service life of sets of laminated composites by analyzing their diffusion coefficients and activation energies, using Fick’s law and Arrhenius principle. Jute fiber woven mat reinforced epoxy laminated composites (JFMRLCs) were prepared by simple hand lay-up and compression molding methods. The layering patterns of 0º balanced laminate of [0º/0º/0º/0º/0º], 30º angle-ply laminate of [0º/+30º/0º/-30º/0º] and 45° angle-ply laminate of [0°/+45°/0°/-45°/0°] were used to prepare the composite samples, according to classical laminated plate theory (CLPT). The composites were immersed in water at different periods of 10, 20, 30 and 40 days aging. The effects of the various periods of aging on their mechanical properties were studied. The results showed that the weights of the composite samples increased by increasing the aging periods. The mechanical properties of aged (wet) composites were compared with the unaged (dry) counterparts to predict their strengths retention. The composite with 45° layering pattern exhibited the maximum strength retention. Also, the same composite sample with layering pattern of 45° produced the maximum activation energy, based on Arrhenius principle. The tensile fractured surfaces were analyzed to investigate into their fiber-matrix interfacial bonds through images obtained from scanning electron microscopy (SEM). Summarily, it was evident that optimum JFMRLCs with layering pattern of 45° exhibited best mechanical properties. Hence, they can act as suitable, sustainable, low cost and environmentally friendly composite materials for structural marine and other related engineering applications.

Microstructure and mechanical properties of dissimilar pinless friction stir spot welded 2A12 aluminum alloy and TC4 titanium alloy joints

2018 ◽  
Vol 25 (12) ◽  
pp. 3075-3084 ◽  
Author(s):  
Xia-wei Yang ◽  
Wu-yuan Feng ◽  
Wen-ya Li ◽  
Qiang Chu ◽  
Ya-xin Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloy ◽  
Aluminum Alloy ◽  
Friction Stir ◽  
Tc4 Titanium Alloy ◽  
Microstructure And Mechanical Properties ◽  
Spot Welded

Manufacturing of Nanostructured Blades for a Francis Turbine by Isothermal Forging of AA6063

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
D. Salcedo ◽  
C. J. Luis ◽  
J. León ◽  
I. Puertas ◽  
J. P. Fuertes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Aluminum Alloy ◽  
Research Work ◽  
Francis Turbine ◽  
Compression Tests ◽  
Isothermal Forging ◽  
Forging Process ◽  
Different Temperatures ◽  
Traditional Approaches

This research work deals with the manufacturing of blades for a Francis turbine with a submicrometric structure through the isothermal forging of a heat-treatable aluminum alloy that has been previously processed by angular channel extrusion. In addition, mechanical properties and microstructure of these same blades are analyzed. A comparative study is also carried out between the properties obtained in the forged blades from the alloy previously deformed through angular channel extrusion and those obtained by employing two other isothermal forging processes of this alloy which mean utilizing different process stages. Moreover, a modeling by finite element about the isothermal forging process of the blades is performed using flow rules obtained from compression tests on these alloys at different temperatures. In this way, a much higher degree of accuracy is achieved in the results compared with that obtained through traditional approaches. With this present study, it is intended to make some progress in the development of nanostructured mechanical components with the aim of demonstrating the feasibility of their manufacturing and achieving an improvement in their mechanical properties.

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