Influence of high-frequency peening and atmosphere of marine climate on the cyclic life of T-welded joints with surface fatigue cracks

2020 ◽  
Vol 2020 (4) ◽  
pp. 22-28
Author(s):  
V.V. Кnysh ◽  
◽  
S.O. Solovei ◽  
L.I. Nyrkova ◽  
V.G. Kot ◽  
...  
Keyword(s):  
Welded Joints ◽  
High Frequency ◽  
Fatigue Cracks ◽  
Cyclic Life ◽  
Surface Fatigue ◽  
Marine Climate

scholarly journals Impact of high-frequency peening and marine atmosphere on the cyclic life of t-welded joints with surface fatigue cracks

2020 ◽  
Vol 2020 (4) ◽  
pp. 19-24
Author(s):  
V.V. Knysh ◽  
◽  
S.O. Solovei ◽  
L.I. Nyrkova ◽  
V.G. Kot ◽  
...  
Keyword(s):  
Welded Joints ◽  
High Frequency ◽  
Fatigue Cracks ◽  
Marine Atmosphere ◽  
Cyclic Life ◽  
Surface Fatigue

THE INFLUENCE OF POSTWELD TEMPERING ON MECHANICAL BEHAVIOR OF FRICTION WELDED JOINTS OF 32G2 AND 40HN STEELS UNDER HIGH-CYCLE FATIGUE

2021 ◽  
pp. 7-18
Author(s):  
A. S. Atamashkin ◽  
◽  
E. Yu. Priymak ◽  
◽  
Keyword(s):  
Welded Joints ◽  
High Cycle Fatigue ◽  
High Efficiency ◽  
Welded Joint ◽  
Fatigue Cracks ◽  
Cycle Fatigue ◽  
Cyclic Life ◽  
Tempering Temperature ◽  
Residual Strains ◽  
Fatigue Loads

At modern mechanical facilities, the friction-welded joints are getting widespread as the most advanced production technique characterized by high efficiency, processability, cost-effectiveness, and safety. Moreover, it allows producing high-quality joints of a large number of different analogous and opposite metals and alloys. Despite all these advantages, one should consider that metal, in the process of welded joint formation, suffers a local thermo-deformational effect, which causes the gradient nature of the structure and residual strains of a welded joint. These factors directly influence the structure’s working ability and durability under fatigue loads, which are the most common cause for parts failure. The paper contains the assessment of the post-weld tempering influence on the cyclic life of welded joints of 32G2 and 40HN steels produced using the rotational friction welding technique. The authors tested laboratory specimens with welded joints under the high-cycle fatigue using the simulation machine with the two-point fastening of a revolving specimen under the action of even twisting moment. The study involved the statistical processing of the obtained results of cyclic life. Based on the metallographic analysis, the authors identified the weak points in welded points where the fatigue cracks initiation and progress occurred in the initial state and after tempering. The paper presents the fractographs illustrating the fracture mechanism of specimens under the study. The authors identified the influence of different tempering temperature modes on the cyclic life of the studied welded joints and the nature of their fracture. The study shows that tempering at the temperature over 400 °C promotes fracture acceleration under the effect of fatigue loads due to the development of return and polygonization processes in the vulnerable area of the thermomechanical action zone.

Influence of corrosion damage on cyclic life of butt welded joints strengthened by high-frequency mechanical peening

2018 ◽  
Vol 2018 (2) ◽  
pp. 14-18
Author(s):  
V.V. Knysh ◽  
◽  
S.A. Solovej ◽  
L.I. Nyrkova ◽  
V.N. Miryanin ◽  
...  
Keyword(s):  
Welded Joints ◽  
High Frequency ◽  
Corrosion Damage ◽  
Cyclic Life

Influence of corrosion damage on cyclic life of butt welded joints strengthened by high-frequency mechanical peening

2018 ◽  
Vol 2018 (2) ◽  
pp. 9-24
Author(s):  
V.V. Knysh ◽  
◽  
S.A. Solovej ◽  
L.I. Nyrkova ◽  
V.N. Miryanin ◽  
...  
Keyword(s):  
Welded Joints ◽  
High Frequency ◽  
Corrosion Damage ◽  
Cyclic Life

scholarly journals Application of high-frequency peening to improve the performance of butt welded joints in the atmosphere of temperate climate

2017 ◽  
Vol 2017 (4) ◽  
pp. 14-18 ◽  
Author(s):  
V.V. Knysh ◽  
◽  
S.A. Solovej ◽  
V.I. Kyrian ◽  
L.I. Nyrkova ◽  
...  
Keyword(s):  
Welded Joints ◽  
High Frequency ◽  
Temperate Climate

Constraint-Loss Model for the Growth of Surface Fatigue Cracks

2009 ◽  
pp. 637-637-20 ◽  
Author(s):  
RH Van Stone ◽  
MS Gilbert ◽  
OC Gooden ◽  
JH Laflen
Keyword(s):  
Fatigue Cracks ◽  
Loss Model ◽  
Surface Fatigue

Influence of Marine Media on the Fatigue Strength of Butt Welded Joints of 15KhSND Steel Hardened by High-Frequency Mechanical Impacts

2020 ◽  
Vol 55 (6) ◽  
pp. 812-821
Author(s):  
V. V. Knysh ◽  
S. O. Solovei ◽  
L. I. Nyrkova ◽  
S. O. Osadchuk
Keyword(s):  
Fatigue Strength ◽  
Welded Joints ◽  
High Frequency
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