scholarly journals Identifying Optimal FSW Process Parameters for 2024 Al Alloy Butt Joints

2019 ◽  
Vol 13 (4) ◽  
pp. 48-53
Author(s):  
Rafał Kluz ◽  
Magdalena Bucior ◽  
Andrzej Kubit
Keyword(s):  
Process Parameters ◽  
Al Alloy ◽  
Butt Joints

scholarly journals Friction Stir Welding with Low-Medium-High Tool Travel Speed of 0.95 Mg-Al-Alloy and Pure Copper: Electrochemical and Surface Studies

2018 ◽  
Author(s):  
Neetesh Soni ◽  
Ambrish Singh
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Pure Copper ◽  
Travel Speed ◽  
Localized Corrosion ◽  
Al Alloy ◽  
Kelvin Probe ◽  
Friction Stir ◽  
Surface Optical ◽  
Joining Process

The aim of this work is to assess the influence of Friction Stir Welding (FSW), process parameters, optimized tool traveling speed, and corrosion resistance of the 0.95 Mg-Al-alloy and pure copper weldment. Samples of aluminum-copper with and without deformation were characterized to investigate the metallurgical effects created during the welding deformation process. Effect of process parameters on microstructure and corrosion rate have been investigated for all the samples. All the electrochemical and polarization tests were done in 3.5 wt.% NaCl solution. Scanning Kelvin Probe (SKP) was done to detect the localized corrosion on the surface. Optical micrography observation indicated that the primary α-Al phase, which was formed during solidification can effectively limit the growth of Cu9Al4 phase. Finer acicular α-Al precipitates were observed in CuAl matrix during joining process that tends to coarser with the increase in tools travel speed. The electrochemical and polarization results showed that among all the tool travelling speed the specimen joined at tool travelling speed of 40 mm/min shows the best non-corrosive property.

scholarly journals Parametric Investigation of Effect of Abnormal Process Conditions on Self-Piercing Riveting

2020 ◽  
Vol 10 (7) ◽  
pp. 2520 ◽  
Author(s):  
Taek-Eon Jeong ◽  
Dong-Hyuck Kam ◽  
Cheolhee Kim
Keyword(s):  
Process Parameters ◽  
Dissimilar Materials ◽  
High Strength ◽  
Process Conditions ◽  
Al Alloy ◽  
Main Process ◽  
Cross Sectional ◽  
Practical Applications ◽  
Parametric Investigation ◽  
Offset Distance

Self-piercing riveting (SPR) is one of the mechanical joining processes, and its application to Al/Fe dissimilar materials combination, which is hard to weld, is expanding in the automotive industry. The main process parameters in SPR are types of rivet and die, setting force, and rivet setting speed. Previously, the relationship between the main process parameters and output parameters such as cross-sectional characteristics and joint strength has been studied to optimize the SPR process. In practical applications, there are unexpected and abnormal process conditions such as poor fit-up, angular misalignment, edge offset distance, and inaccurate setting and pre-clamping forces, and their effects on the joining quality have not been discussed. In this study, parametric investigation was performed using an experimental design on SPR joints for 1 mm-thick high strength steel (590 DP) and 2 mm-thick Al alloy (Al5052-H32). The main effect of each level of the abnormal process parameters on the output parameters was statistically investigated, and the analysis of variance was performed for each abnormal process parameter. In the range of abnormal process conditions applied, the set force was the most significant factor affecting the output parameters, and the effect of pre-clamping force on the output parameters was the least significant.

Microstructures and Properties of Thick Plate Butt Joints of Al Alloy 6082 Prepared with FSW

2011 ◽  
Vol 189-193 ◽  
pp. 3400-3404 ◽  
Author(s):  
Wen Biao Gong ◽  
Shi Jun Wang ◽  
Yan Jin Wang ◽  
Jun Jiu Wang
Keyword(s):  
Thick Plate ◽  
Al Alloy ◽  
Butt Joints

Microstructural Effects of Electromagnetic Stirring Strength and Casting Speed in Continuous Casting of Al Alloy

2004 ◽  
Vol 449-452 ◽  
pp. 321-324 ◽  
Author(s):  
Dock Young Lee ◽  
Ki Bae Kim ◽  
Ho In Lee ◽  
Do Hyang Kim
Keyword(s):  
Continuous Casting ◽  
Process Parameters ◽  
Casting Speed ◽  
Surface Defect ◽  
Continuous Caster ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Electromagnetic Stirring ◽  
Al Alloy ◽  
Primary Crystal

Semi-solid forming usually requires feed stock material in form of cylindrical billets with a uniform, globular and fine grain microstructure. These billets are commonly being produced by continuous casting involving agitation of the solidifying melt. The paper will present the development of a horizontal continuous casting machine using circumferential electromagnetic stirring to generate melt flow and shear rate in the continuous casting mould. The machine has been used to study the influence of various process parameters such as electromagnetic stirring strength and casting speed in the production of Al billet with a diameter of 76mm. In order to establish the quantitative relationship between microstructure and the process parameters, the morphology and primary crystal size of billet were observed according to the casting speed and electromagnetic stirring strength. A depth and distance of surface defect on the billet was decreased with increasing a casting speed and a very good smooth surface without any surface defect appeared on the billet produced at a casting speed of 600mm/min. A thickness of the solidifying shell was decreased with increasing the casting speed and the maximum casting speed without a break-out was 600mm/min in horizontal continuous caster designed in this study. Both the size and the aspect ratio of primary crystal were decreased with increasing the casting speed and electromagnetic stirring strength in the range of this study.

Research on Synchronized Cooling Hot Forming Process of 6016 Aluminum Alloy

2012 ◽  
Vol 452-453 ◽  
pp. 81-85 ◽  
Author(s):  
Ming He Chen ◽  
Y.Y. Cao ◽  
W. Chen ◽  
Guo Liang Chen
Keyword(s):  
Aluminum Alloy ◽  
Process Parameters ◽  
High Strength ◽  
Strengthening Mechanism ◽  
Alloy Sheet ◽  
Hot Forming ◽  
Al Alloy ◽  
Forming Process ◽  
Process Step ◽  
6016 Aluminum Alloy

In order to improve formability of high strength Al-alloy sheet metal, in this paper, it come up with the synchronized cooling hot forming process. Taking the aluminum alloy of 6016 H18 aluminum alloy, which carried out its technology test by Gleeble3500 hot-mechanical simulator. The process parameters such as deformation temperature T, holding time t and cooling rate v is investigated by the orthogonal test and the microstructure is analyzed simultaneously. The results show that the synchronized cooling hot forming process can be applied to 6016 H18 aluminum alloy, it both improves the formability of 6016 H18 aluminum alloy significantly and obtains the high strength after forming, it can meet the purpose of implementing deformation and enhanced in one process step, the proper combination of process parameters are T=450 °C, t=210 s, v=60 °C/s. Strengthening mechanism is which there is a large number of strengthening phase precipitated from matrix in technology process, the strengthening phases are coarser and the dispersed uniformity is a bit worse compared with that of T4 state.

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