Fatigue strength of high-strength fine-grained structural steels in the flame cut condition Kaufmann, I., Schonherr, W. and Sonsino, C.M. Schweissen Schneiden (1995) 3, E46–E51

1996 ◽  
Vol 18 (5) ◽  
pp. 345
Keyword(s):  
Fatigue Strength ◽  
High Strength ◽  
Structural Steels ◽  
Fine Grained

scholarly journals Usage of Ti-surface-modified filler material to increase the joint strength of High-Strength Low Alloyed (HSLA) steels under different load types

2020 ◽  
Vol 2 (12) ◽  
Author(s):  
Kai Treutler ◽  
Volker Wesling
Keyword(s):  
Dynamic Load ◽  
Base Material ◽  
High Strength ◽  
Tensile Tests ◽  
Fatigue Tests ◽  
Structural Steels ◽  
Titanium Coating ◽  
Fine Grained ◽  
Weld Toe ◽  
Load Types

AbstractWelding-related loss of strength, especially in the case of fatigue, significantly reduces the range of applications for high-strength fine-grained structural steels. In order to counteract this situation, the aim of the work is to increase the strength of welded joints made of high-strength fine-grained structural steels by using coated welding consumables. This is described using the example of a titanium coating for quasi-static and abrupt dynamic load and fatigue. The thermomechanical rolled fine-grained structural steel S700MC is used as the base material, using a welding filler of the same type. MAG welding was used to produce the fillet welds on a T-joint. In addition to tensile tests at four different load speeds up to 2 m/s, the results of fatigue tests are presented. In addition, the microstructure of the weld seams is examined by metallographic methods and the scanning electron microscope. A comparison with two joints from an unmodified variant and another steel grade with comparable properties (S690QL) serves to classify the results. It is shown that the use of modified filler metals has a significant influence on the overall strength of the welded joint due to the rounding of the weld toe. Thus, the fatigue strength can be increased by around 50%. In addition, the strength under sudden dynamic load can be increased by 10%.

scholarly journals CHANGE OF STRUCTURAL CONDITION OF WELDED JOINTS BETWEEN HIGH‐STRENGTH FINE‐GRAINED AND STRUCTURAL STEELS

2004 ◽  
Vol 10 (2) ◽  
pp. 87-95 ◽  
Author(s):  
Jörg Hildebrand ◽  
Frank Werner
Keyword(s):  
High Strength ◽  
Structural Condition ◽  
Structural Steels ◽  
Thermal Calculation ◽  
Fine Grained ◽  
Hardness Curve ◽  
Method Of Solution ◽  
Temperature Transformation ◽  
Good Concordance ◽  
Transformation Diagrams

First, the production process of fine‐grained structural steels was considered. The results from the thermal calculation, which is a part of the welding simulation, were compared with measurements and good concordance was achieved. A modification of the hardness was found during the analysis of the hardness curve, the so‐called local hardness drop. The reason was the transformation of the structure, caused by thermal factors. The available TTA (time‐temperature‐austenite) and available TTT (time‐temperature‐transformation) diagrams do not describe this tempering process, which results in tempering structural condition by means of constituents of the martensite and bainite. The method of solution was applied to an example of a mismatch‐joint and a good concordance was achieved.

scholarly journals Safe choice of structural steels in a region of ultra-high number of load cycles

2019 ◽  
Vol 24 (24) ◽  
pp. 25-28 ◽  
Author(s):  
František Nový ◽  
Otakar Bokůvka ◽  
Libor Trško ◽  
Michal Jambor
Keyword(s):  
Fatigue Strength ◽  
Cyclic Loading ◽  
Fatigue Resistance ◽  
High Frequency ◽  
High Strength Steels ◽  
High Strength ◽  
Structural Steels ◽  
Experimental Results ◽  
Average Value ◽  
Continuous Decrease

Abstract In this paper the authors introduce their own selected experimental results in the field of the investigation of fatigue resistance of structural steels. The experiments were carried out on the nine structural steels including high strength steels, DOMEX 700MC, HARDOX 400, HARDOX 450, 100Cr6 (UTS from 446 MPa to 2462 MPa) at high-frequency cyclic loading (f = 20 kHz, T = 20 ± 5 °C, R = -1) in the region of number cycles ranged from N ≈ 2×106 to N ≈ 2×109 cycles of loading. The continuous decrease of fatigue strength in dependence on the number of loading cycles was observed with the average value of ratio σa2×109/σa2×106 = 0.69.

Fatigue strength of high-strength structural steels

1982 ◽  
Vol 14 (6) ◽  
pp. 744-746
Author(s):  
L. S. Andreev ◽  
A. M. Belkin ◽  
V. S. Dronov
Keyword(s):  
Fatigue Strength ◽  
High Strength ◽  
Structural Steels

DILLIMAX 690

Alloy Digest ◽  
2012 ◽  
Vol 61 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Structural Steel ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Fine Grained ◽  
Minimum Yield

Abstract Dillimax 550 is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of 690 MPa (100 ksi). Plate is delivered in three qualities: basic, tough, and extra tough. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-652. Producer or source: Dillinger Hütte GTS.

DILLIMAX 500

Alloy Digest ◽  
2012 ◽  
Vol 61 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Structural Steel ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Fine Grained ◽  
High Toughness ◽  
Minimum Yield

Abstract Dillimax 500 is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of 500 MPa (72 ksi). Plate is delivered in three qualities: basic, high toughness, and extra tough. This datasheet provides information on composition, physical properties, and tensile properties as well as fracture toughness. It also includes information on surface qualities as well as forming, heat treating, and joining. Filing Code: SA-645. Producer or source: Dillinger Hütte GTS.

Sign in / Sign up

Export Citation Format

Share Document