High temperature fatigue behavior and residual stress stability of laser-shock peened and deep rolled austenitic steel AISI 304

2004 ◽  
Vol 50 (10) ◽  
pp. 1345-1350 ◽  
Author(s):  
I Nikitin ◽  
B Scholtes ◽  
H.J Maier ◽  
I Altenberger
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Austenitic Steel ◽  
Fatigue Behavior ◽  
Laser Shock ◽  
Aisi 304 ◽  
High Temperature Fatigue ◽  
Steel Aisi

Alternative Mechanical Surface Treatments for Fatigue Strength Enhancement

2005 ◽  
Vol 490-491 ◽  
pp. 328-333 ◽  
Author(s):  
I. Altenberger
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Strain Aging ◽  
Fatigue Behavior ◽  
Laser Shock Peening ◽  
Dynamic Strain ◽  
Laser Shock ◽  
Deep Rolling ◽  
Shock Peening ◽  
Mechanical Surface

In this paper, The effects of laser-shock peening and high temperature deep rolling on nearsurface microstructures, residual stress states and fatigue behavior of various metallic materials are investigated and discussed. Similar to warm peening (shot peening at elevated temperatures), high temperature deep rolling may induce several favourable effects, especially in ferritic steels, where dynamic strain aging by carbon atoms can be exploited as a major strengthening mechanism. But also in materials without ‚classical‘ strain aging high temperature deep rolling is effective in improving the fatigue behaviour by inducing favourable, e.g. precipitation-hardened, nearsurface microstructures. As a consequence, these modified near-surface microstructures directly alter the thermal and mechanical relaxation behaviour of residual stresses. Laser-shock peening is already used in the aircraft industry (as a mechanical surface treatment for fan-blades) and owes its benefial effects to deep layers of compressive residual stress and work hardening and a relatively smooth surface roughness. Characteristic examples of microstructures and residual stress profiles as generated by laser-shock peening are presented. Moreover, the impact on the fatigue behavior of steels and a titanium alloy is outlined and discussed.

Effect of laser shock peening on residual stress, microstructure and fatigue behavior of ATI 718Plus alloy

2017 ◽  
Vol 102 ◽  
pp. 121-134 ◽  
Author(s):  
Micheal Kattoura ◽  
Seetha Ramaiah Mannava ◽  
Dong Qian ◽  
Vijay K. Vasudevan
Keyword(s):  
Residual Stress ◽  
Fatigue Behavior ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening
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