Three-dimensional numerical and experimental investigation on friction stir welding processes of ferritic stainless steel

2013 ◽  
Vol 61 (7) ◽  
pp. 2649-2661 ◽  
Author(s):  
Hoon-Hwe Cho ◽  
Sung-Tae Hong ◽  
Jae-Hun Roh ◽  
Hyun-Sik Choi ◽  
Suk Hoon Kang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Friction Stir Welding ◽  
Ferritic Stainless Steel ◽  
Three Dimensional ◽  
Friction Stir ◽  
Welding Processes

Role of Overlap Ratio on the Microstructure of Friction Stir Multiseam Cladded Copper-Stainless Steel Lap Joints

2020 ◽  
Vol 979 ◽  
pp. 102-106
Author(s):  
A.K. Lakshminarayanan ◽  
K. L. Harikrishna
Keyword(s):  
Stainless Steel ◽  
Friction Stir Welding ◽  
Microstructural Analysis ◽  
Lap Joints ◽  
Dissimilar Welding ◽  
Copper Sheet ◽  
Practical Applications ◽  
Friction Stir ◽  
Overlap Ratio ◽  
Welding Processes

Dissimilar welding of copper to stainless steel using conventional welding processes usually exhibits defects such as solidification cracks, lack of fusion and deterioration in mechanical properties due to the difference in the base metal properties. This is mainly due to minimum solubility of copper in stainless steel. Use of solid state welding such as friction stir welding can be potential solution to this problem. This study is carried out with the aim of cladding copper sheet on a stainless steel by friction stir welding variant known as friction stir cladding. Considering practical applications, to clad copper over stainless steel sheet, multi seam friction stir cladding procedure must be adopted. Though many parameters need to be considered, overlap ratio is one of significant factor which affects the microstructure of clad joints. Hence, five overlap ratios namely 0%, 25 %, 50 %, 75% and 100 % were used to fabricate the dissimilar friction stir copper-stainless steel clad joints. Microstructural analysis was carried out at different regions of clad joints using optical microcopy and correlated with bond strength values

Modeling Texture Evolution During Friction Stir Welding of Stainless Steel With Comparison to Experiments

2007 ◽  
Vol 130 (1) ◽  
Author(s):  
Jae-Hyung Cho ◽  
Paul R. Dawson
Keyword(s):  
Stainless Steel ◽  
Friction Stir Welding ◽  
Electron Backscatter Diffraction ◽  
Texture Evolution ◽  
Three Dimensional ◽  
Element Formulation ◽  
Friction Stir ◽  
Polycrystal Plasticity ◽  
Backscatter Diffraction ◽  
Tool Pin

Texture evolution during friction stir welding of stainless steel was investigated using a polycrystal plasticity model together with a three-dimensional, thermomechanically coupled, finite element formulation. The influence of frictional conditions with the tool pin and shoulder on the flow in the through-thickness direction was examined in terms of their impact on the evolving crystallographic texture. Trends in regard to the strengthening and weakening of the texture are discussed in relation to the relative magnitudes of the deformation rate and spin. Finally, the computed textures are compared to electron backscatter diffraction measurements and are discussed with respect to distributions along orientational fibers and the dominant texture components along the fibers.

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