Effect of Friction Welding Parameters on the Mechanical and Microstructural Properties of Dissimilar IN713C-AISI 4140 Joints

This study investigates the inﬂuence of friction pressure at a given burn-off length on the microhardness, tensile properties and microstructure of the welded joints from steel 32-2-Mn and 40-Cr-Ni. Phase transformations occurring in the materials to be welded as a result of thermal deformation effects are analyzed. The change in the length of the thermomechanical affected zone (TMAZ) depending on the friction pressure is shown. The results of the distribution of microhardness in the weld, clearly illustrating the formation of hardened and weakened areas. The results of tensile tests of welded joints are given. Analyzed the place of fracture at various welding parameters. The necessity of studying the distribution of internal residual stresses to explain the mechanism of fracture of welded joints is shown.

Download Full-text

Effect of Welding Parameters on Mechanical and Microstructural Properties of Dissimilar AA6082-AA2024 Joints Produced by Friction Stir Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.519-521.1163 ◽

2006 ◽

Vol 519-521 ◽

pp. 1163-1168 ◽

Cited By ~ 5

Author(s):

Pasquale Cavaliere ◽

Antonio Squillace

Keyword(s):

Friction Stir Welding ◽

Testing Machine ◽

Fatigue Tests ◽

Optical Observations ◽

Control Mode ◽

Welding Parameters ◽

Microstructural Properties ◽

Amplitude Control ◽

Friction Stir ◽

Mechanical And Microstructural Properties

The effect of processing parameters on mechanical and microstructural properties of dissimilar AA6082-AA2024 joints produced by Friction Stir Welding was analysed in the present study. Different samples were produced by employing a fixed rotating speeds of 1600 RPM and by using the advancing speeds of the tool of 80 and 115 mm/min. All the welds were produced in direction perpendicular to the rolling one for both the alloys and by changing, for all the processing conditions, the alloy positioned on the advancing side of the tool. The mechanical properties of the joints were evaluated by room temperature tensile tests. Fatigue tests on the welds were carried out by using a resonant electro-mechanical testing machine under constant loading control up to 250 Hz sine wave loading. The fatigue tests were conducted in the axial total stress-amplitude control mode with R=smin/smax=0.1. The microstructural evolution of the material was analysed by optical observations of the welds cross sections and SEM observations of the fracture surfaces.

Download Full-text

Effect of Welding Parameters on Mechanical and Microstructural Properties of Dissimilar Aluminum Alloy Joints Produced by Friction Stir Welding

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.592-594.250 ◽

2014 ◽

Vol 592-594 ◽

pp. 250-254 ◽

Cited By ~ 1

Author(s):

Sabitha Jannet ◽

P. Koshy Mathews

Keyword(s):

Friction Stir Welding ◽

Rolling Direction ◽

Structural Evolution ◽

Tensile Tests ◽

Processing Parameters ◽

Welding Parameters ◽

Microstructural Properties ◽

Rotating Speed ◽

Friction Stir ◽

Mechanical And Microstructural Properties

The effect of processing parameters on the mechanical and microstructural properties of dissimilar AA6061 t6–AA5083 0 joints produced by friction stir welding was studied. Different samples were produced by varying the advancing speeds of the tool as 20 and 40 mm/min and by varying the alloy positioned on the advancing side of the tool. In the various trials the rotating speed is varied from 600 to 900 RPM. All the welds were produced perpendicular to the rolling direction for both the alloys. Micro hardness (HV) and tensile tests performed at room temperature were used to evaluate the mechanical properties of the joints. Various tests were performed on the joints previously subjected to ageing. In order to analyze the micro structural evolution of the material, the welds’ zones were observed optically.

Download Full-text

Effect of Friction Time on the Mechanical and Microstructural Properties of AA6061 Joints by Continuous Drive Friction Welding

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.3438 ◽

2020 ◽

Vol 10 (3) ◽

pp. 5596-5602

Author(s):

M. A. Tashkandi ◽

M. I. Mohamed

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Process Parameters ◽

Friction Welding ◽

Grain Structure ◽

Microstructural Properties ◽

Mechanical And Microstructural Properties ◽

Microstructure Of The Material

Friction welding is becoming a viable replacement of conventional joining methods. Continuous Drive Friction Welding (CDFW) is a type of friction welding used to join rods, tubes and similar shapes. Usually, the process contains a friction stage and a forging stage and the process parameters would be ticked accordingly. AA6061 is an Mg and Si aluminum alloy that is widely used in many industries. This research investigates the effect of friction time on the mechanical properties of AA6061 joints made with CDFW and the relation to the microstructure of the material and thermal profiles. It was found that AA6061 does not require a forging stage where solid joints are obtained without forging and did not fracture within the welding zones. Also, it was concluded that the process parameters are to be tailored in a way that produces a specific type of grain structure within the welding areas.

Download Full-text