Effect of Pressure and Process Parameters on Weld Joint Properties of St E 36 and St E 47 Dry FCA-MAG Welds

1983 ◽  
pp. 239-246 ◽  
Author(s):  
H. Hoffmeister ◽  
G. Huismann ◽  
H.G. Schafstall
Keyword(s):  
Process Parameters ◽  
Weld Joint ◽  
Effect Of Pressure ◽  
Joint Properties

Explosion Welding: Process Evolution and Parameters Optimization

2018 ◽  
Vol 941 ◽  
pp. 1558-1564 ◽  
Author(s):  
Girolamo Costanza ◽  
Maria Elisa Tata ◽  
Diego Cioccari
Keyword(s):  
Process Parameters ◽  
Welding Process ◽  
Explosion Welding ◽  
Parameters Optimization ◽  
Comprehensive Understanding ◽  
Laminate Composites ◽  
Materials Properties ◽  
Key Points ◽  
Joint Properties ◽  
Wide Range

The development of explosion welding (EXW) technology underwent a stop as soon as it was introduced, however, in the recent years an increasing interest was found due to the wide range of materials which can be welded, similar and especially dissimilar ones. In addition to the high quality, such welded joints show a good compromise among the involved materials properties. Literature does not provide a comprehensive understanding of the whole mechanism and occurring phenomena but is mostly limited to analyse just some process parameters, like the investigations on joint properties that can be achieved if process takes place under vacuum or open air. In this work some key points are discussed to describe the evolution step of the process and the innovations introduced like the MIL (metallic-intermetallic laminate) composites for aerospace industry. Process parameters are analyzed to highlight the positive and negative aspects, the experiments in the laboratory will be described to confine the explosion to the joint and in particular to minimize the explosion energy and to improve the efficiency of the technique. At last some significant applications where this technique is widely used are showed.

scholarly journals The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1443 ◽  
Author(s):  
Maroš Vyskoč ◽  
Miroslav Sahul ◽  
Mária Dománková ◽  
Peter Jurči ◽  
Martin Sahul ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Process Parameters ◽  
Flow Rate ◽  
Weld Joint ◽  
Gas Flow ◽  
Filler Wire ◽  
Shielding Gas ◽  
Gas Flow Rate ◽  
Weld Joints

In this article, the effect of process parameters on the microstructure and mechanical properties of AW5083 aluminum alloy weld joints welded by a disk laser were studied. Butt welds were produced using 5087 (AlMg4.5MnZr) filler wire, with a diameter of 1.2 mm, and were protected from the ambient atmosphere by a mixture of argon and 30 vol.% of helium (Aluline He30). The widest weld joint (4.69 mm) and the highest tensile strength (309 MPa) were observed when a 30 L/min shielding gas flow rate was used. Conversely, the narrowest weld joint (4.15 mm) and the lowest tensile strength (160 MPa) were found when no shielding gas was used. The lowest average microhardness (55.4 HV0.1) was recorded when a 30 L/min shielding gas flow rate was used. The highest average microhardness (63.9 HV0.1) was observed when no shielding gas was used. In addition to the intermetallic compounds, β-Al3Mg2 and γ-Al12Mg17, in the inter-dendritic areas of the fusion zone (FZ), Al49Mg32, which has an irregular shape, was recorded. The application of the filler wire, which contains zirconium, resulted in grain refinement in the fusion zone. The protected weld joint was characterized by a ductile fracture in the base material (BM). A brittle fracture of the unshielded weld joint was caused by the presence of Al2O3 particles. The research results show that we achieved the optimal welding parameters, because no cracks and pores were present in the shielded weld metal (WM).

Process analysis and regression modelling of resistance spot welded joints of austenitic stainless steel 304L and low carbon steel sheets by using surface response methodology

2020 ◽  
pp. 095440892094088
Author(s):  
Lokesh Boriwal ◽  
RM Sarviya ◽  
MM Mahapatra
Keyword(s):  
Mathematical Model ◽  
Process Parameters ◽  
Weld Joint ◽  
Welded Joints ◽  
Joint Strength ◽  
Process Analysis ◽  
Dissimilar Material ◽  
Joint Analysis ◽  
Low Carbon ◽  
Spot Welded

Evaluating the strength performance of spot-welded joints of dissimilar material is critical for their continued integration into the automobile and aerospace industries. The effect of weld joint strength is an important consideration in the design of weld structures. The objective of the present work undertaken to investigate the effect of the input process parameters on the strength of the welded joint of dissimilar material. Full factorial design (FFD) has used for designing the experiment matrix. Further, experimental results have used to develop a mathematical model to predict the strength of the spot weld joint. Analysis of Variance (ANOVA) has been applied to establish the correlation between the process parameters and their interaction on the output. The confirmation test case experiments have conducted for validating the developed mathematical model and observed that the developed model is capable of evaluating weld joint strength within the process parameters.

Estimating the mechanical properties of friction welded AISI410 MSS joints using empirical relationship

2020 ◽  
Vol 117 (6) ◽  
pp. 618
Author(s):  
M. Bakkiyaraj ◽  
G. Saikrishnan ◽  
V. Balasubramanian
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Response Surface Methodology ◽  
Process Parameters ◽  
Rotational Speed ◽  
Empirical Relationship ◽  
Optimization Procedure ◽  
Fracture Morphology ◽  
Weld Interface ◽  
Joint Properties

The present study aims to develop the numerical relationship to attain maximum tensile strength of the friction welded AISI410 MSS joints by using response surface methodology. The friction welding (FW) process parameters considered for optimization namely rotational speed, upset pressure, friction time, and upset time. The FW parameters of 31 sets have been used to manufacture the joints to attain the maximum strength. Moreover, the detail relates the optimization procedure with respect to welding conditions on AISI410 MSS joints and its optimized parameters were reported. The optimized results have been correlated with the weld interface of the specimen with reference to tensile properties, macro and microstructure features, hardness, and fracture morphology. Finally, the results concluded that the rotational speed as the most effectual process parameter on the joint properties of the FW AISI410 MSS joint.

An Experimental Study of Process Parameters on Friction Stir Welded Aluminum Alloy 2219 Joint Properties

2017 ◽  
Vol 863 ◽  
pp. 3-7
Author(s):  
Koo Kil No ◽  
Joon Tae Yoo ◽  
Jong Hoon Yoon ◽  
Ho Sung Lee
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Solid State ◽  
Process Parameters ◽  
Process Condition ◽  
Welding Process ◽  
Frictional Heat ◽  
Friction Stir ◽  
Joint Properties ◽  
Aluminum Alloy 2219

Aluminum alloy 2219 is widely used in aerospace applications since it has a unique combination of good weldability and high specific strength. Furthermore, it can provide a high strength after heat treatment with superior properties in cryogenic environment so they have been widely used for cryogenic fuel tank of space launch vehicles. It is known that solid state welding like friction stir welding can improve the joint properties of this alloy. Friction stir welding is a solid state welding technology which two materials are welded together by the frictional heat due to the rotation of the tool. In this study, friction stir welding was performed on aluminum alloy 2219 sheets. The range of welding parameter is four rotation speeds from 350 to 800 rpm and six travel speeds from 120 to 420 mm/min. The results include the microstructural change after friction stir welding. The microstructure was characterized and material in the stirred zone experience sufficient deformation and heat input which cause the complete dynamic recrystallization. The present work represents the strength at each process condition and the optimum friction stir welding process parameters. The optimum weld efficiency obtained in this study was 76.5 %.

Process Design for the Manufacturing of Magnetic Pulse Welded Joints

2011 ◽  
Vol 473 ◽  
pp. 243-250 ◽  
Author(s):  
Verena Psyk ◽  
G. Gershteyn ◽  
Bjoern Barlage ◽  
Christian Weddeling ◽  
Bibiana Albuja ◽  
...  
Keyword(s):  
Process Parameters ◽  
Process Design ◽  
Model Experiment ◽  
Dissimilar Materials ◽  
Surface Preparation ◽  
Magnetic Pulse ◽  
Promising Alternative ◽  
Joint Properties ◽  
Impact Parameters ◽  
The Impact

When manufacturing joints of dissimilar materials thermal technologies as welding reach their limits. Impact welding by electromagnetic forming is a promising alternative because undesired heating of the parts and related disadvantages are avoided. In this process impact parameters need to be adjusted to each specific joining task, but cannot be settled directly. Thus, a two-step methodology is suggested for the process design: First the influence of the impact parameters and the surface preparation on the joint properties is investigated using a model experiment. Joint properties are characterized by metallographic investigations. Parallel to this, the influence of the adjustable process parameters and the equipment on the workpiece acceleration and the impact properties is analyzed. Then the results of both investigation paths are combined and conclusions regarding a target-oriented adjusting of the impact parameters via the process parameters are drawn. In the paper first results considering the model experiment and the analysis of the electromagnetic expansion process are presented and joints manufactured by electromagnetic expansion are characterized.

Experimental Research on Laser Transmission Micro-Joining Based on the Mask

2014 ◽  
Vol 620 ◽  
pp. 17-22
Author(s):  
Cai Lian Fan ◽  
Hui Xia Liu ◽  
Zhen Guan Zhao ◽  
Yan Wei Wu ◽  
Xiao Wang
Keyword(s):  
Experimental Research ◽  
Process Parameters ◽  
Weld Joint ◽  
Joint Strength ◽  
High Quality ◽  
Weld Geometry ◽  
Medical Microbiology ◽  
Joint Width ◽  
Materials Used ◽  
Gap Width

With the demand of high-quality and aesthetical products in the domain of medical microbiology, it’s more and more important to join micro weld. Due to traditional joining methods’ difficulty in meeting the demands, laser transmission micro-joining is of great significance. The materials used to laser transmission micro-joining based on the mask are PET, and the experiments are conducted on diode laser. The weld geometry with different gap widths on the mask is demonstrated at the same process parameters. In addition, the causes of forming different morphologies are analyzed. The formation mechanism of weld is analyzed as well. Moreover, process parameters’ effects on joint strength and joint width are deeply explored when gap width on the mask is 0.3mm. The results show that100 um micro weld joint is realized. At the same time, the range of process parameters is determined.

On the effect of heat input in plasma microwelding of maraging steel

2017 ◽  
Vol 233 (3) ◽  
pp. 807-822
Author(s):  
Tinku Saikia ◽  
Mayuri Baruah ◽  
Swarup Bag
Keyword(s):  
Finite Element ◽  
Maraging Steel ◽  
Process Parameters ◽  
Weld Joint ◽  
Heat Input ◽  
Process Model ◽  
Welding Process ◽  
Fusion Welding ◽  
Welding Distortion ◽  
Influence Of Process Parameters

Maraging steel in known as ultra-high strength and toughness material widely used in aerospace industry and defense system. The joining of this material by fusion welding process experiences gigantic metallurgical transformation that have significant contribution toward the development of welding distortion, and transformation of austenite into martensite at very low temperature with significant increase in specific volume. In this study, a set of bead-on-plate welding is executed at microscale to establish feasible range of process parameters using plasma arc as a source of heat. Although, high-concentrated heat does not produce much distortion, the heat input to the weld joint experiences the difference in possible distortion. A finite element–based numerical process model is also developed to investigate the differential influence of process parameters on thermo-mechanical behavior of weld joint. An inverse approach is followed to estimate the unknown input parameters by integrating the finite element model with optimization algorithm. The integrated model predicts the shape and size of weld geometry and welding distortion that are well agreed with experimental values.

Study on the Effects of Process Parameters on Weld Joint using Coaxial Inside-Beam Wire Feeding

2011 ◽  
Vol 287-290 ◽  
pp. 2279-2282
Author(s):  
Chen Wang ◽  
Shi Hong Shi ◽  
Ai Qin Xu ◽  
Xue Lei Han ◽  
Hong Yuan Li ◽  
...  
Keyword(s):  
Process Parameters ◽  
Weld Joint ◽  
Laser Power ◽  
Metal Plate ◽  
Welding Seam ◽  
Scanning Velocity ◽  
Feeding Process ◽  
Feeding Speed ◽  
Wire Feeding ◽  
Joint Quality

The effects of process parameters such as laser power, scanning velocity and wire feeding speed on weld joint quality has been discussed through some laser welding experiments using coaxial inside-beam wire feeding process method. The results reveal that: Along with the increase of the laser power, weld width and depth are increasing gradually; Coating surface will appear burning loss and deboss when laser power is too large. The increase of scanning velocity decreases the depth and width of molten bath, and abates laser hole-effect, so the metal plate can not be welded penetration. Larger wire feeding speed can avoid welding seam produce burning loss, but it also can strengthen welding wire reflect the laser, and decline the welding.

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