Fatigue behavior of double-sided laser shock peened Ti-6Al-4V thin blade subjected to foreign object damage

2020 ◽  
Vol 121 ◽  
pp. 105784 ◽  
Author(s):  
Xudong Ren ◽  
Bingquan Chen ◽  
Jiafei Jiao ◽  
Yu Yang ◽  
Wangfan Zhou ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Foreign Object ◽  
Laser Shock ◽  
Foreign Object Damage ◽  
Thin Blade

Synchrotron Strain Mapping of the Residual Strain Distribution around Foreign Object Damage in Laser Shock Peened Ti-6AL-4V Alloy

2010 ◽  
Vol 652 ◽  
pp. 19-24 ◽  
Author(s):  
Suraiya Zabeen ◽  
Michael Preuss ◽  
Philip J. Withers ◽  
Sven Spanrad ◽  
Jie Tong ◽  
...  
Keyword(s):  
Residual Strain ◽  
Strain Distribution ◽  
Leading Edge ◽  
Foreign Object ◽  
Laser Shock ◽  
Residual Stress Field ◽  
Strain Mapping ◽  
Foreign Object Damage ◽  
Ballistic Impacts ◽  
Shock Peening

The current study investigates the effect of foreign object damage (FOD) on the pre-existing compressive residual stress field associated with laser shock peening (LSP) and its evolution upon combined LCF/HCF cycling. FOD was introduced onto an aerofoil-shaped specimen that had been previously LSP treated through ballistic impacts at angles of 0° and 45° to the leading edge. It is shown that the FOD notch created by 45° impact was asymmetric in shape and smaller in depth compared to that created at 0° impact. Significant through thickness compression was introduced parallel to the leading edge as a result of the LSP process. The residual strain distribution was mapped around the FOD notch by synchrotron X-ray radiation. The results show predominantly compressive stresses ahead of the notch, being greater for the 0 compared to 45 impact. No significant stress relaxation was observed after a combined (1000 HCF cycles superimposed on 1 LCF cycle) cycle.

Laser Shock Processing: Applications and Future Trends in U.S. Air Force Service

2005 ◽  
Author(s):  
M. J. Shepard
Keyword(s):  
Air Force ◽  
Damage Tolerance ◽  
The United States ◽  
Foreign Object ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Current Application ◽  
Foreign Object Damage ◽  
Us Air Force ◽  
Shock Processing

To date, the United States Air Force is the largest end-user of laser shock processing services. Laser shock processing (LSP) is in successful day-to-day service and production for several USAF engine lines for increased foreign object damage tolerance. In this application LSP has yielded substantial increases in foreign object damage tolerance along with associated increases in safety. The history and current application of laser shock processing for US Air Force applications will be reviewed. Current and future USAF applications of laser shock processing and other surface treatments will be reviewed.

scholarly journals Residual stresses due to foreign object damage in laser-shock peened aerofoils: Simulation and measurement

2015 ◽  
Vol 82 ◽  
pp. 78-90 ◽  
Author(s):  
B. Lin ◽  
S. Zabeen ◽  
J. Tong ◽  
M. Preuss ◽  
P.J. Withers
Keyword(s):  
Residual Stresses ◽  
Foreign Object ◽  
Laser Shock ◽  
Foreign Object Damage

High cycle fatigue behavior of Ti–6Al–4V with simulated foreign object damage

2001 ◽  
Vol 33 (11) ◽  
pp. 679-692 ◽  
Author(s):  
Shankar Mall ◽  
Joseph L Hamrick, II ◽  
Theodore Nicholas
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Foreign Object ◽  
Cycle Fatigue ◽  
Foreign Object Damage
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