Mechanical Properties of Friction Stir Welded Carbon Steel Joints — Friction Stir Welding with and without Transformation

The purpose of this research is to use friction stir welding (FSW) to join dissimilar metals, annealed low carbon steel and A1050 pure aluminum. A butt joint with a similar sheet thickness of 1.9 mm was applied. The novelties of the research are relatively using high generated heat produced by a combination of low traverse speed and high rotational speed to perform the dissimilar joints and using a tool material (K107cold work tool steel) which has not been used in FSW with tool cooling. The present work studied the effect of FSW variables such as tilt angle, tool cooling, base metal location on mechanical properties. Tensile tests were used to evaluate the mechanical properties of the dissimilar joints. The microstructure specimens were examined using a scanning electron microscope (SEM). Sound dissimilar joints were successfully produced. The maximum joint efficiency obtained in this study is 51.7% of the aluminum tensile strength. The microstructure images showed that many steel fragments were sheared off from the steel surface by the tool action and scattered in the weld nugget, a continuous intermetallic compound (IMC) layer formed at the interface, the thickness of the IMC layer at the interface decreased in the thickness direction of the weld. FeAl3 IMC phase was only observed at the interface.

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Microstructures and mechanical properties evolution during friction stir welding of SK4 high carbon steel alloy

Materials Science and Engineering A ◽

10.1016/j.msea.2012.08.052 ◽

2012 ◽

Vol 558 ◽

pp. 572-578 ◽

Cited By ~ 23

Author(s):

S.A. Khodir ◽

Y. Morisada ◽

R. Ueji ◽

H. Fujii

Keyword(s):

Mechanical Properties ◽

Friction Stir Welding ◽

Carbon Steel ◽

High Carbon Steel ◽

Steel Alloy ◽

High Carbon ◽

Friction Stir ◽

Microstructures And Mechanical Properties

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Role of Induction Preheating on Tool Wear and Properties of Friction Stir Welded 409M Stainless Steel Joints

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.401 ◽

2015 ◽

Vol 787 ◽

pp. 401-405

Author(s):

V.G. Vijay Prakaash ◽

A. Vignesh ◽

A.K. Lakshminarayanan ◽

V. Balasubramanian

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Friction Stir Welding ◽

Tool Wear ◽

Friction Stir ◽

Axial Forces ◽

Degradation Analysis ◽

Tool Profile ◽

Steel Joints

An attempt is made to reduce the process forces and tool wear during friction stir welding of 409M ferritic stainless steel and to enhance the mechanical properties by induction preheating of base metal with different preheating temperatures at the leading of tool. It is observed that the preheating significantly decreased the longitudinal and axial forces. Tool degradation analysis was carried out to find out the loss of tool profile and material. Mechanical properties especially impact toughness values were increased due to significant reduction in the tool wear.

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Effect of Tool Material and Offset on Friction Stir Welding of Al Alloy to Carbon Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.445.747 ◽

2012 ◽

Vol 445 ◽

pp. 747-752 ◽

Cited By ~ 5

Author(s):

Namdar Karimi ◽

S. Nourouzi ◽

M. Shakeri ◽

M. Habibnia ◽

A. Dehghani

Keyword(s):

Mechanical Properties ◽

Friction Stir Welding ◽

Carbon Steel ◽

Feed Rate ◽

Tool Material ◽

Butt Joint ◽

Al Alloy ◽

Friction Stir ◽

Tool Offset ◽

Dissimilar Friction Stir Welding

In this research, effect of tool material and tool offset on tool erosion and metallurgical and mechanical properties of dissimilar friction stir welding of Al alloy to carbon steel are investigated. As the tool erosion is one of the important parameters on the defect-free friction stir welding, especially in butt joint of Al alloy to steel. In present work, different tool material and offset are used in friction stir welding at Al alloy to carbon steel with a constant tool speed and feed rate named as 710 rpm and 28 mm/min respectively. The result of experimental observation is shown better performance by tungsten carbide (WC) tool material with 1 mm offset on Al alloy area.

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