TY - JOUR
T1 - Measurement of residual stress by load and depth sensing indentation with spherical indenters
AU - Swadener, J.G.
AU - Taljat, B.
AU - Pharr, G.M.
N1 - Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2001/7
Y1 - 2001/7
N2 - A new experimental technique is presented for making measurements of biaxial residual stress using load and depth sensing indentation (nanoindentation). The technique is based on spherical indentation, which, in certain deformation regimes, can be much more sensitive to residual stress than indentation with sharp pyramidal indenters like the Berkovich. Two different methods of analysis were developed: one requiring an independent measure of the material's yield strength and the other a reference specimen in the unstressed state or other known reference condition. Experiments conducted on aluminum alloys to which controlled biaxial bending stresses were applied showed that the methods are capable of measuring the residual stress to within 10-20% of the specimen yield stress. Because the methods do not require imaging of the hardness impressions, they are potentially useful for making localized measurements of residual stress, as in thin films or small volumes, or for characterization of point-to-point spatial variations of the surface stress.
AB - A new experimental technique is presented for making measurements of biaxial residual stress using load and depth sensing indentation (nanoindentation). The technique is based on spherical indentation, which, in certain deformation regimes, can be much more sensitive to residual stress than indentation with sharp pyramidal indenters like the Berkovich. Two different methods of analysis were developed: one requiring an independent measure of the material's yield strength and the other a reference specimen in the unstressed state or other known reference condition. Experiments conducted on aluminum alloys to which controlled biaxial bending stresses were applied showed that the methods are capable of measuring the residual stress to within 10-20% of the specimen yield stress. Because the methods do not require imaging of the hardness impressions, they are potentially useful for making localized measurements of residual stress, as in thin films or small volumes, or for characterization of point-to-point spatial variations of the surface stress.
KW - aluminum alloys
KW - Deformation
KW - hardness testing
KW - indentation
KW - loads (forces)
KW - Depth sensing indentation
KW - residual stresses
UR - http://www.scopus.com/inward/record.url?scp=0035410827&partnerID=8YFLogxK
UR - http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7998829&fileId=S088429140006893X
U2 - 10.1557/JMR.2001.0286
DO - 10.1557/JMR.2001.0286
M3 - Article
AN - SCOPUS:0035410827
SN - 0884-2914
VL - 16
SP - 2091
EP - 2102
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 7
ER -