Strain aging of high-strength steels

1969 ◽  
Vol 11 (10) ◽  
pp. 792-797
Author(s):  
N. G. Orekhov ◽  
L. M. Pevzner ◽  
A. S. Tarantova ◽  
S. T. Kishkin
Keyword(s):  
Strain Aging ◽  
High Strength Steels ◽  
High Strength

Effect of Prestrain at Elevated Temperature on the Fracture Behavior of High Strength Steels

1983 ◽  
Vol 105 (1) ◽  
pp. 16-20 ◽  
Author(s):  
K. Satoh ◽  
M. Toyoda ◽  
Y. Mutoh
Keyword(s):  
Elevated Temperature ◽  
Cleavage Fracture ◽  
Fracture Mechanism ◽  
Strain Aging ◽  
Fracture Behavior ◽  
Present Report ◽  
High Strength Steels ◽  
High Strength ◽  
Fracture Initiation ◽  
Initiation And Propagation

It is well known that fracture initiation behavior is influenced by weld thermal straining. In the present report, attention is focused on the influence of weld thermal straining on the fracture mechanism. The influence of prestrain at elevated temperature or strain-aging on the initiation and propagation behaviors of ductile and cleavage fracture in KD32 and HT80 steels is investigated. A relationship between the increase in the lowest temperature at which a tear dimple region can be observed (Ti) or the decrease in stretched zone width and the increase in hardness at the notch tip is found.

scholarly journals Strain-Ageing of Low-Alloyed Multiphase High-Strength Steels

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 439 ◽  
Author(s):  
Ludovic Samek ◽  
Jakub Dykas ◽  
Emmanuel De Moor ◽  
Adam Grajcar
Keyword(s):  
Strain Aging ◽  
Volume Fraction ◽  
High Strength Steels ◽  
High Strength ◽  
X Ray Diffraction ◽  
X Ray ◽  
Static Strain ◽  
Static Strain Aging ◽  
Thin Foils ◽  
Long Time

The strain-aging of low alloyed, multiphase high-strength steels with strain-induced austenite to martensite transformation was studied. The influence of prestrain, aging time, and temperature dependence of the static strain aging was carried out. Ageing temperatures between 60 and 220 ∘ C and aging times from 20 to 10,000 min were investigated. The choice of steel composition allowed studying the influence of alloying elements, such as Si and Al, on the static strain aging behavior. Samples after aging were studied using light-optical microscopy, X-ray diffraction, and in-depth transmission electron microscopy (TEM). The Harper model was used to describe the precipitation mechanisms occurring during aging. The study of thin foils after aging using TEM showed the precipitation of low temperature transition carbides in the microstructure, which was observed between 60 and 5000 min. By using X-ray diffraction, it was revealed that aging at 170 ∘ C for a long time caused a slight decrease of the retained austenite volume fraction, but the C content remained constant.

Features of welding technology for pipes from high-strength steels

2017 ◽  
Vol 7 (6) ◽  
pp. 54-59
Author(s):  
Nikolay G. Goncharov ◽  
◽  
Oleg I. Kolesnikov ◽  
Alexey A. Yushin ◽  
◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Welding Technology
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