Measurement of Residual Stresses Using Nanoindentation Method

Abstract

Instrumented indentation, which is also known as nanoindentation or depth-sensing indentation, is increasingly being used to probe the residual stresses of materials including bulk solids, thin films, and coatings. The residual stresses are proved to have significant effects on various nanoindentation parameters such as hardness, loading curve, unloading curve, pile-up amount around indentation, and true contact area. By analyzing these parameters, numerous methods are developed to evaluate the residual stresses of materials in recent years. This article reviews six commonly used models which determine residual stresses from analyzing load-depth curves, as well as indentation fracture technique which is based on the classical fracture mechanics. Emphasis is placed on the principle, application and limitation of each nanoindentation method.

Surface Mechanical Characterization of Carbon Nanofiber Reinforced Low-Density Polyethylene by Nanoindentation and Comparison with Bulk Properties

“…The existing residual stress fields have shown to affect the mechanical properties of composite materials measured by nanoindentation techniques [32,33,34,35]. Such stress fields are readily generated by inhomogeneous heat treatment, local plastic deformation or thermal expansion coefficient mismatch between the matrix and the fillers in composite materials.…”

Bending Nanoindentation and Plasticity Noise in FCC Single and Polycrystals

“…Nanoindentation provides a unique opportunity to probe mechanical deformation at the nanoscale of any solid surface. While numerous experimental nanoindentation studies have been conducted to understand size effects [1][2][3][4][5][6][7][8] and residual stresses [9][10][11][12] in nano-and microscale plasticity, it has been elusive to use surface nanoindentation to distinguish surface from bulk crystal plasticity features [13][14][15][16][17][18][19][20][21]. In a dislocation-free region, nanoindentation turns from elastic to plastic through a sudden burst, labeled as primary "pop-ins" [22][23][24][25][26][27][28][29][30].…”

Bending, Nanoindentation and Plasticity Noise in FCC Single and Poly Crystals

“…Nano-indentation provides a unique opportunity to probe mechanical deformation at the nanoscale of any solid surface. While numerous experimental nanoindentation studies have been conducted to understand nano and micro scale plasticity [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], it has been elusive to use surface nanoindentation to distinguish surface from bulk crystal plasticity features. In a dislocation-free region, nanoindentation turns from elastic to plastic through a sudden burst, labeled as primary "pop-ins" [19][20][21][22][23][24][25][26][27][28].…”