The effect of loading rate on the strength and toughness of fine-grained structural steels

1992 ◽  
Vol 63 (12) ◽  
pp. 545-553 ◽  
Author(s):  
Karl Kussmaul ◽  
Thomas Dernier
Keyword(s):  
Loading Rate ◽  
Structural Steels ◽  
Fine Grained ◽  
Strength And Toughness

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%.

Enhanced strength and toughness in ultra-fine grained 99.9% copper obtained by cryo-hydrostatic extrusion

2018 ◽  
Vol 141 ◽  
pp. 375-387 ◽  
Author(s):  
W. Pachla ◽  
M. Kulczyk ◽  
J. Smalc-Koziorowska ◽  
S. Przybysz ◽  
M. Wróblewska ◽  
...  
Keyword(s):  
Hydrostatic Extrusion ◽  
Fine Grained ◽  
Strength And Toughness
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