8.13 Nanoindentation Methods in Interfacial FractureTesting A. A. VOLINSKY Motorola Corporation, Mesa, AZ, USA D. F. BAHR Washington State University, Pullman, USA M. D. KRIESE Osmic, Auburn Hills, MI, USA N. R. MOODY Sandia National Laboratories, Livermore, CA, USA and W. GERBERICH University of Minnesota, Minneapolis, USA 8.13.1 INTRODUCTION 454 8.13.2 ADHESION 456 8.13.2.1 Thermodynamic Work of Adhesion 456 8.13.2.2 Practical Work of Adhesion 457 8.13.3 INTERFACIAL FRACTURE TEST TECHNIQUES 459 8.13.3.1 Sandwich Specimen Tests 459 8.13.3.2 Bulge and Blister Tests 461 8.13.3.3 Superlayer Test 462 8.13.3.4 Indentation Tests 463 8.13.3.5 Superlayer Indentation Test 465 8.13.3.6 Scratch Tests 465 8.13.4 NANOINDENTATION—MECHANICAL PROPERTIES 467 8.13.4.1 Elastic Properties 467 8.13.4.1.1 Load vs. displacement curves 467 8.13.4.1.2 Continuous stiffness 468 8.13.4.1.3 Thin film—substrate effects 468 8.13.4.2 Plastic Properties 469 8.13.4.2.1 Yield strength 469 8.13.4.2.2 Bulk materials 470 453