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

Suraiya Zabeen; Michael Preuss; Philip J. Withers; Sven Spanrad; Jie Tong; John Schofield

doi:10.4028/www.scientific.net/MSF.652.19

Paper Titles

Preface and Committees

Optimization of Material Properties Using Genetic Algorithms
p.1

Residual Microstress of Austenitic Stainless Steel Due to Tensile Deformation
p.7

Intergranular Strains in Pre-Strained and Welded Pipes
p.13

Synchrotron Strain Mapping of the Residual Strain Distribution around Foreign Object Damage in Laser Shock Peened Ti-6AL-4V Alloy
p.19

Determination of the Residual Stress Field around Scratches Using Synchrotron X-Rays and Nanoindentation
p.25

Residual Stress Evaluation of Carburized Transmission Steel Gear Using Neutron and Synchrotron X-Ray Diffraction and Finite Element Methods
p.31

Combined Neutron and X-Ray Diffraction Analysis for the Characterization of a Case Hardened Disc
p.37

Numerical Modeling of Residual Stress and Prediction of Heat Affected Zone Induced by PTA Process
p.44

HomeMaterials Science ForumMaterials Science Forum Vol. 652Synchrotron Strain Mapping of the Residual Strain...

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

Abstract:

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.

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Periodical:

Materials Science Forum (Volume 652)

Pages:

19-24

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.652.19

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Online since:

May 2010

Authors:

Suraiya Zabeen, Michael Preuss, Philip J. Withers, Sven Spanrad, Jie Tong, John Schofield

Keywords:

Foreign Object Damage (FOD), Laser Shock Peening (LSP), LCF/HCF, Residual Stress, Ti6Al4V

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