Abstract

The increasing demand for high-precision manufacturing has necessitated the development of advanced material characterization techniques. Nanoindentation and non-contact optical metrology have emerged as powerful methods for evaluating the mechanical and surface properties of materials with high accuracy and resolution. Nanoindentation provides quantitative measurements of hardness, elastic modulus, and other mechanical properties at micro- and nanoscale levels. It utilizes an indenter to apply controlled force while recording depth penetration, offering insights into deformation behavior, phase transformations, and time-dependent mechanical responses such as creep and stress relaxation. However, traditional contact-based indentation techniques have limitations, including surface damage and measurement errors due to tip blunting. To overcome these challenges, non-contact optical metrology techniques, including interferometry, confocal microscopy, and white light profilometry, have been integrated with nanoindentation for enhanced material characterization. These optical methods allow for precise surface topography measurements without mechanical interaction, reducing the risk of surface alteration and increasing measurement repeatability. Additionally, advancements in machine learning and artificial intelligence have facilitated the automated analysis of nanoindentation and optical data, improving efficiency and accuracy in large-scale material assessments. The integration of nanoindentation with non-contact optical metrology provides a comprehensive approach to characterizing mechanical properties while simultaneously mapping surface roughness, texture, and defects. This combination is particularly beneficial in the semiconductor, aerospace, biomedical, and additive manufacturing industries, where surface integrity and mechanical performance are critical. By correlating indentation responses with optical surface measurements, a deeper understanding of material behavior can be achieved, leading to improved process control, quality assurance, and failure analysis in manufacturing. This study explores the latest developments in nanoindentation and optical metrology, focusing on their synergistic application for precise material characterization. Experimental case studies demonstrate how these techniques enhance measurement resolution, reproducibility, and sensitivity across various material systems. The findings provide valuable insights into optimizing metrology techniques for next-generation manufacturing applications.