Improvement of the Contour Method for Measurement of Near-Surface Residual Stresses from Laser Peening

Toparli, M.; Fitzpatrick, M.; Gungor, S.
November 2013
Experimental Mechanics;Nov2013, Vol. 53 Issue 9, p1705
Academic Journal
A study was conducted to develop a methodology to obtain near-surface residual stresses for laser-peened aluminium alloy samples using the contour method. After cutting trials to determine the optimal cut parameters, surface contours were obtained and a new data analysis method based on spline smoothing was applied. A new criterion for determining the optimal smoothing parameters is introduced. Near-surface residual stresses obtained from the contour method were compared with X-ray diffraction and incremental hole drilling results. It is concluded that with optimal cutting parameters and data analysis, reliable near-surface residual stresses can be obtained by the contour method.


Related Articles

  • Assessing shot-peening residual stresses by using the incremental hole-drilling technique and laser interferometry (DSPI). Nobre, J. P.; Oliveira, M.; Albertazzi, A.; Viotti, M.; Batista, A. C.; Coelho, L.; Marques, M. J. // Advanced Materials Research;2014, Vol. 996, p269 

    The incremental hole-drilling technique was applied to determine residual stress profiles in shot-peened steel layers. The accuracy of using an enhanced Digital Speckle Pattern Interferometry technique for measuring the strain relaxation arising around the drilled holes and, consequently, the...

  • The Use of Renka Cline algorithm in X-Ray Diffraction Residual Stress Measurement. Chunguang Li; Zhongchen Dai; Zhonghuang Yun; Dongfeng Li; Xinghua Cao // Advanced Materials Research;2014, Issue 881-883, p1846 

    Using the Renka Cline algorithm provided by OriginPro8.6 to fit the longitudinal residual stress through parts of the measurement value on the A7N01-T5 aluminum alloy butt welded joints compared with the whole measurement value. The result shows that the fitting value approximates the...

  • INFLUENCE OF VIBRATORY STRESS RELIEF ON RESIDUAL STRESSES IN BRIDGE STRUCTURAL MEMBERS WELDMENTS. JurĀius, Aurimas; Valiulis, Algirdas Vaclovas; Černašėjus, Olegas // Baltic Journal of Road & Bridge Engineering (Baltic Journal of R;Dec2011, Vol. 6 Issue 4, p243 

    The welding process can join two similar materials with a bond that has mechanical properties comparable to the original material. Unfortunately, this process induces residual stresses in the weldment, which, if left untreated, can cause distortion of the part, premature fatigue failure or...

  • Laser Shock Peening on a 6056-T4 Aluminium Alloy for Airframe Applications. Glaser, Daniel; Polese, Claudia; Bedekar, Rachana D.; Plaisier, Jasper; Pityana, Sisa; Masina, Bathusile; Mathebula, Tebogo; Troiani, Enrico // Advanced Materials Research;2014, Issue 891-892, p974 

    Laser Shock Peening (LSP) is a material enhancement process used to introduce compressive residual stresses in metallic components. This investigation explored the effects of different combinations of LSP parameters, such as irradiance (GW/cm2) and laser pulse density (spots/mm2), on 3.2 mm...

  • Application of Pulsed Eddy Current Technique in Stress and Residual Stress Measurement. Habibalahi, A.; Safizadeh, M. S. // International Journal of Advanced Design & Manufacturing Technol;Mar2014, Vol. 7 Issue 1, p67 

    Stress and residual stress are the main problems in the operating materials. They are the principal causes of material failure and may affect life time of component. However measurement or their predictions are typically difficult. Two common non-destructive methods, X-ray diffraction and...

  • Neutron and X-ray Diffraction Residual Stress Measurements in Aluminium Alloys MIG Welded T-Joints after Friction Stir Processing. Nobre, J. P.; Batista, A. C.; Kornmeier, J. R.; Costa, J. D.; Loureiro, A.; Jesus, J. S. // Advanced Materials Research;2014, Vol. 996, p439 

    Friction Stir Processing (FSP) is a relatively new post-processing technique. Fatigue strength of MIG fillet welds of aluminium alloys can be substantially improved using FSP. Beyond other properties intrinsically tied to fatigue life, especially attention should be paid to the effect of the...

  • Development and Application of the Contour Method to Determine the Residual Stresses in Thin Laser-Peened Aluminium Alloy Plates. Toparli, M.; Fitzpatrick, M. // Experimental Mechanics;Feb2016, Vol. 56 Issue 2, p323 

    The contour method was applied to obtain residual stress fields in a laser-peened 2.0-mm-thick Al2024-T351 sample. In order to remove the effects of near-surface wire electro-discharge machining (EDM) cutting artefacts on the measured residual stresses, sacrificial blocks were attached to both...

  • The formation of decagonal and icosahedral phases in Al75-xPd25Crx (x <3 at.%) quasicrystals. Tsai, An-Pang; Inoue, Akihisa; Masumoto, Tsuyoshi // Journal of Applied Physics;2/15/1991, Vol. 69 Issue 4, p2728 

    provides information on an aluminum-palladium decagonal phase which changes to an F-type isosahedral phase by the substitution of chromium for aluminum. Orientation relationship among the tenfold, the pseudo-fivefold and the pseudo-threefold zone axis of the D phase; X-ray diffraction patterns...

  • Analysis of Blind-Holes Applied in the Hole-Drilling Method for Residual Stress Measurements. Blödorn, R.; Viotti, M.; Schroeter, R.; Albertazzi, A. // Experimental Mechanics;Nov2015, Vol. 55 Issue 9, p1745 

    The measurement of residual stress by the Hole-drilling method consists basically of drilling a blind-hole in the material under study. That relieves and redistributes the stresses around this hole promoting a surface deformation which adapts to a new equilibrium condition. This deformation...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics