Fatigue of Automotive High Strength Steel Sheets and Their Welded Joints

1983 ◽  
Author(s):  
Masatoshi Shinozaki ◽  
Toshiyuki Kato ◽  
Toshio Irie ◽  
Isao Takahashi
Keyword(s):  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Sheets

scholarly journals Effect of Welding Methods on Fatigue Properties of Welded Joints of High Strength Steel Sheets for Automobiles

2005 ◽  
Vol 54 (9) ◽  
pp. 927-934 ◽  
Author(s):  
Hiroshi TSUDA ◽  
Yoshihiko SUNAYAMA ◽  
Masashi DAIMARUYA ◽  
Hidetoshi KOBAYASHI
Keyword(s):  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Fatigue Properties ◽  
Steel Sheets

scholarly journals Effect of Chemical Composition on the Formability of Flash Butt Welded Joints in Hot-rolled High-strength Steel Sheets

1982 ◽  
Vol 68 (9) ◽  
pp. 1340-1347 ◽  
Author(s):  
Masatoshi SHINOZAKI ◽  
Hiroshi HASHIMOTO ◽  
Toshiyuki KATO ◽  
Toshio IRIE
Keyword(s):  
Chemical Composition ◽  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Sheets ◽  
Hot Rolled

Fracture Prediction Method of Arc Welded Joints in High-Strength Steel Sheets

2021 ◽  
Vol 90 (7) ◽  
pp. 475-478
Author(s):  
Hideki UEDA ◽  
Hiroki FUJIMOTO ◽  
Eisuke NAKAYAMA ◽  
Yusaku OMORI
Keyword(s):  
Welded Joints ◽  
High Strength Steel ◽  
Prediction Method ◽  
High Strength ◽  
Fracture Prediction ◽  
Steel Sheets

Mechanical clinching with dies for control of metal flow of ultra-high-strength steel and high-strength steel sheets

2017 ◽  
Vol 232 (4) ◽  
pp. 644-649 ◽  
Author(s):  
Yohei Abe ◽  
Takato Saito ◽  
Ken-Ichiro Mori ◽  
Toru Kato
Keyword(s):  
Tensile Strength ◽  
Welded Joints ◽  
High Strength Steel ◽  
Metal Flow ◽  
High Strength ◽  
Steel Sheets ◽  
Tension Tests ◽  
Element Simulation ◽  
Ultra High Strength Steel ◽  
Mechanical Clinching

Ultra-high-strength steel sheets having a tensile strength of more than 1 GPa and a low ductility were joined by mechanical clinching with dies for control of metal flow. The bottom angle of the die was modified to increase interlocking between the sheets under avoidance of the sheet fracture. The effect of the die shape on metal flow in the sheet combination including an ultra-high-strength steel sheet was investigated by the finite element simulation and the experiment. As the tensile strength of the steel sheets increased, the joining range was narrow due to low ductility of the sheets. The static and fatigue strengths of the mechanically clinched joints were compared with those of the welded joints. Although the static loads of the mechanically clinched joints were smaller than those of the resistance spot welded joints in both tension-shearing and cross-tension tests, the fatigue loads of the clinched joints were larger. It was found that the mechanically clinched joint has superior fatigue strength.

Influence of low-temperature tempering on structure and properties of welded joints of high-strength steel 30Kh2N2MF

2020 ◽  
Vol 2020 (6) ◽  
pp. 20-26
Author(s):  
O.A. Gaivoronskyi ◽  
◽  
V.D. Poznyakov ◽  
O.M. Berdnikova ◽  
T.O. Alekseenko ◽  
...  
Keyword(s):  
Low Temperature ◽  
Welded Joints ◽  
High Strength Steel ◽  
High Strength ◽  
Structure And Properties

scholarly journals Mechanical clinching and self-pierce riveting for sheet combination of 780-MPa high-strength steel and aluminium alloy A5052 sheets and durability on salt spray test of joints

2021 ◽  
Vol 113 (1-2) ◽  
pp. 59-72
Author(s):  
Yohei Abe ◽  
Ken-ichiro Mori
Keyword(s):  
Aluminium Alloy ◽  
High Strength Steel ◽  
Salt Spray ◽  
High Strength ◽  
Alloy Sheet ◽  
Galvanized Steel ◽  
Load Reduction ◽  
Minimum Thickness ◽  
Steel Sheets ◽  
Mechanical Clinching

AbstractTo increase the usage of high-strength steel and aluminium alloy sheets for lightweight automobile body panels, the joinability of sheet combinations including a 780-MPa high-strength steel and an aluminium alloy A5052 sheets by mechanical clinching and self-pierce riveting was investigated for different tool shapes in an experiment. All the sheet combinations except for the two steel sheets by self-pierce riveting, i.e., the two steel sheets, the two aluminium alloy sheets, and the steel-aluminium alloy sheets, were successfully joined by both the joining methods without the gaps among the rivet and the sheets. Then, to show the durability of the joined sheets, the corrosion behaviour and the joint strength of the aged sheets by a salt spray test were measured. The corrosion and the load reduction of the clinched and the riveted two aluminium alloy sheets were little. The corrosion of the clinched two steel sheets without the galvanized layer progressed, and then the load after 1176 h decreased by 85%. In the clinched two galvanized steel sheets, the corrosion progress slowed down by 24%. In the clinched steel and aluminium alloy sheets, the thickness reduction occurred near the minimum thickness of the upper sheet and in the upper surface on the edge of the lower aluminium alloy sheet, whereas the top surface of the upper sheet and the upper surface of the lower sheet were mainly corroded in the riveted joint. The load reduction was caused by the two thickness reductions, i.e., the reduction in the minimum thickness of the upper sheet and the reduction in the flange of the aluminium alloy sheet. Although the load of the clinched steel without the galvanized coating layer and aluminium alloy sheets decreased by about 20%, the use of the galvanized steel sheet brought the decrease by about 11%. It was found that the use of the galvanized steel sheets is effective for the decrease of strength reduction due to corrosion.

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