scholarly journals Effect of Stress Ratio on Bending Fatigue Strength in Butt-Welded Joints of Low-Carbon Steel and High Strength Steel.

1992 ◽  
Vol 41 (469) ◽  
pp. 1532-1538
Author(s):  
Hironobu NISITANI ◽  
Hiroyuki TANAKA ◽  
Kensei FUJIMURA
Keyword(s):  
Fatigue Strength ◽  
Carbon Steel ◽  
Welded Joints ◽  
High Strength Steel ◽  
Stress Ratio ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Bending Fatigue ◽  
Bending Fatigue Strength

Reliability Increase of Dissimilar Steel Welded Joints

2014 ◽  
Vol 698 ◽  
pp. 378-381 ◽  
Author(s):  
Alexandra Chevakinskaya ◽  
Aelita Nikulina ◽  
Natalia Plotnikova
Keyword(s):  
Carbon Steel ◽  
Welded Joints ◽  
Rail Steel ◽  
High Carbon Steel ◽  
Low Carbon Steel ◽  
High Strength ◽  
Hadfield Steel ◽  
Nickel Steel ◽  
Low Carbon ◽  
High Carbon

In this paper combined Hadfield steel - stainless steel - rail steel compounds are considered. Structural studies and estimation of mechanical properties showed that using an intermediate layer of low-carbon steel with 0.2 C wt. % and 5-20 mm thick between high-carbon steel and chromium-nickel steel in the formation of welded joints increases the reliability of connections by reducing the amount of high-strength zones as compared to compounds without a barrier layer.

Improvement of Fatigue Strength of Hole Edge of Ultra-High Strength Steel Sheet by Punching Process Including Thickening

2016 ◽  
Vol 716 ◽  
pp. 428-434 ◽  
Author(s):  
Yohei Abe ◽  
Ken-Ichiro Mori ◽  
Ryota Kosaka
Keyword(s):  
Fatigue Strength ◽  
High Strength Steel ◽  
Steel Sheet ◽  
High Strength ◽  
Bending Fatigue ◽  
Hole Edge ◽  
Tensile Fatigue ◽  
Ultra High Strength Steel ◽  
Bending Fatigue Strength ◽  
Punching Process

The effect of the hole edge shape formed by a punching process including thickening on the fatigue strength of the hole of ultra-high strength steel sheets was investigated. The bending and tensile fatigue tests of the thickened hole edge were performed. For the bending fatigue strength, the high height of hole edge was effective because of high bending stiffness. Although the high tensile stiffness was important for the high tensile fatigue strength, the shape of hole edge was alternative. To increase both the bending and tensile fatigue strengths, a compressive process in rollover of hole edge was added for the thickened sheet having a high bending fatigue strength. It was found that the thickened and compressed hole edge of ultra-high strength steel sheet was effective in improving both the bending and tensile fatigue strengths.

Estimation of Some Mechanical Properties for Similar & Dissimilar Welded Joints

2014 ◽  
Vol 2 (1) ◽  
pp. 59-76
Author(s):  
Abdullah Daie'e Assi
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Austenitic Stainless Steel ◽  
Base Metal ◽  
Welded Joints ◽  
Plate Thickness ◽  
Low Carbon Steel ◽  
Dissimilar Metals ◽  
Low Carbon ◽  
Steel Type

This research deals with the choice of the suitable filler metal to weld the similar and dissimilar metals (Low carbon steel type A516 & Austenitic stainless steel type 316L) under constant conditions such as, plate thickness (6 mm), voltage (78 v), current (120 A), straight polarity. This research deals with three major parts. The first parts Four types of electrodes were used for welding of dissimilar metals (C.St A516 And St.St 316L) two from mild steel (E7018, E6013) and other two from austenitic stainless steel (E309L, E308L) various inspection were carried out include (Visual T., X-ray T., δ- Ferrite phase T., and Microstructures T.) and mechanical testing include (tensile T., bending T. and micro hardness T.) The second parts done by used the same parameters to welding similar metals from (C.St A516) Or (St.St 316L). The third parts deals with welding of dissimilar weldments (C.St And St.St) by two processes, gas tungsten are welding (GTAW) and shielded metal are welding (SMAW).        The results indicated that the spread of carbon from low carbon steel to the welding zone in the case of welding stainless steel elect pole (E309L) led to Configuration Carbides and then high hardness the link to high values ​​compared with the base metal. In most similar weldments showed hardness of the welding area is  higher than the hardness of the base metal. The electrode (E309L) is the most suitable to welding dissimilar metals from (C.St A516 With St.St 316L). The results also showed that the method of welding (GTAW) were better than the method of welding (SMAW) in dissimilar welded joints (St.St 316L with C.St A516) in terms of irregular shape and integrity of the welding defects, as well as characterized this weldments the high-lift and resistance ductility good when using the welding conditions are similar.

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