scholarly journals Application of the hybrid process ultrasound enhanced friction stir welding on dissimilar aluminum/dual‐phase steel and aluminum/magnesium joints

2019 ◽  
Vol 50 (8) ◽  
pp. 893-912 ◽  
Author(s):  
M. Thomä ◽  
A. Gester ◽  
G. Wagner ◽  
B. Straß ◽  
B. Wolter ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Dual Phase Steel ◽  
Hybrid Process ◽  
Dual Phase ◽  
Friction Stir

scholarly journals PIN DIAMETER EFFECT ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF DISSIMILAR FRICTION STIR LAP WELDING ALUMINUM ALLOY 6061-T6 TO DUAL PHASE STEEL

2018 ◽  
Vol 24 (2) ◽  
pp. 163 ◽  
Author(s):  
Yazid Helal ◽  
Zakaria Boumerzoug
Keyword(s):  
Aluminum Alloy ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Tensile Shear ◽  
Friction Stir Lap Welding ◽  
Shear Tests ◽  
Friction Stir ◽  
Lap Welding ◽  
Energy Dispersive Spectroscope ◽  
Alloy 6061

<p class="AMSmaintext"> </p><p class="AMSmaintitle">Abstract</p><p class="AMSmaintext">In this work, the effect of the pin diameter on the microstructure, hardness and strength of friction stir welded 6061-T6 aluminum alloy to dual phase steel have been investigated. Microhardness measurements, tensile shear tests, optical microscopy, and scanning electron microscopy with energy dispersive spectroscope (EDS) were the main techniques used. The results showed that friction stir welding can be used for the joining of dissimilar 6061-T6 aluminum alloy to dual phase steel. We have found that the maximum strength is obtained after welding with the highest pin diameter. </p>

scholarly journals Effect of multi-pass friction stir processing on the microstructure and mechanical properties of dual phase steel

2018 ◽  
Vol 2018 (12) ◽  
pp. 140-144 ◽  
Author(s):  
T. Küçükömeroğlu ◽  
◽  
S.M. Aktarer ◽  
G. İpekoğlu ◽  
G. Çam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Processing ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

Microstructure, microhardness and tensile properties of FSWed DP 800 steel

2017 ◽  
Vol 2 (81) ◽  
pp. 56-60 ◽  
Author(s):  
T. Kucukomeroglu ◽  
S.M. Aktarer
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Tungsten Carbide ◽  
Cubic Boron Nitride ◽  
Traverse Speed ◽  
Industrial Applications ◽  
High Wear Resistance ◽  
Dual Phase ◽  
Friction Stir ◽  
Tungsten Carbide Tool

Purpose: Dual phase (DP) steels are widely used in the automotive industry due to their properties of a high balance of strength and formability. However, it is known that conventional welding of high strength steel leads to some undesirable results such as hardness decrease in the heat affected zone. Friction stir welding (FSW) is a new solid state joining method, which is used to join these steels due to its advantage of low heat input. The aim of this study is to evaluate the microstructural change and mechanical properties of friction stir welded DP800 steel. Design/methodology/approach: DP 800 steels with 1.5 mm thickness were subjected to friction stir welding, by using a tungsten carbide (WC) tool. The tool was tilted 2°, and downforce of the tool was kept constant at 6 kN. During processing, the tool rotation and traverse speed were fixed at 1600 rpm and 170 mm∙min-1, respectively. Findings: The friction stir welded region comprises martensite, bainite, refined ferrite. The average microhardness of stir zone has increased from 260 HV0.2 to about 450 HV0.2. The tensile sample shows a decrease in the ultimate tensile strength (σUTS) about 3%, from 827 MPa to 806 MPa for the joint. The yield strength (YS) of the joint is about 566 MPa and the value is near that of DP800. Research limitations/implications: The tungsten carbide tool used for the friction stir welding has suffered deterioration in the pin profile after 1 meter welding operation. It may be advisable to drill a pre-hole in the specimens for a longer tool life. Practical implications: Tool wear for industrial applications will be a major problem. Therefore, the use of tools with high wear resistance such as polycrystalline cubic boron nitride may be recommended. Originality/value: Works on friction stir welding of dual phase steels are limited and they mostly focus on spot welding. Also, this study systematically investigates the microstructure and mechanical properties of dual-phase 800 steels after the friction stir welding.

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