Assessment of specific contribution of residual stress generated near surface anomalies in the high temperature fatigue life of a René 65 superalloy

2016 ◽  
Vol 40 (1) ◽  
pp. 69-80 ◽  
Author(s):  
S. Gourdin ◽  
J. Cormier ◽  
G. Henaff ◽  
Y. Nadot ◽  
F. Hamon ◽  
...  
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Fatigue Life ◽  
Near Surface ◽  
High Temperature Fatigue ◽  
Specific Contribution

scholarly journals Fatigue Life Improvement of the High Strength Steel Welded Joints by Ultrasonic Impact Peening

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 619 ◽  
Author(s):  
Ján Lago ◽  
Libor Trško ◽  
Michal Jambor ◽  
František Nový ◽  
Otakar Bokůvka ◽  
...  
Keyword(s):  
Residual Stress ◽  
Fatigue Life ◽  
Welded Joints ◽  
Compressive Residual Stress ◽  
High Strength ◽  
Fatigue Properties ◽  
Low Alloy Steel ◽  
Residual Stress Field ◽  
Near Surface ◽  
Life Improvement

Ultrasonic impact peening was applied on welded joints manufactured from Strenx 700 MC high strength low alloy steel with the aim to improve the fatigue properties. Three different surface treatment parameters were tested, which resulted in transformation of the near-surface tensile residual stresses in the weld metal and heat affected zone to compressive residual stress field, while maximal values from −400 MPa up to −800 MPa were reached. The highest fatigue life improvement was reached by the double peening with the 85 N contact force, where the fatigue limit for N = 108 cycles increased from 370 MPa to 410 MPa.

THE INFLUENCE OF HELIUM ON THE HIGH TEMPERATURE FATIGUE LIFE OF AUSTENITIC STAINLESS STEEL

1986 ◽  
pp. 973-979
Author(s):  
A. LEESER ◽  
K.-H. ROBROCK ◽  
H. TRINKAUS ◽  
H. ULLMAIER ◽  
I.S. BATRA ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Fatigue Life ◽  
Austenitic Stainless Steel ◽  
High Temperature Fatigue
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