Hardness and creep of steel in the nano and micro ranges: Monograph

By Vasyl Moshchenok

This monograph is a comprehensive and advanced scientific work dedicated to the experimental evaluation and theoretical understanding of hardness and creep behavior of steels in the nano and micro ranges. It is intended for graduate students, researchers, materials engineers, and metrologists involved in the development and analysis of mechanical properties of materials using modern indentation techniques. The book is based on international standards, particularly ISO 14577, and introduces a unified methodology for both recovered and unrecovered indentation, offering a new approach to understanding material behavior under contact loading at small scales. Chapter 1: Determination of the Hardness of Metals and Alloys by the Methods of Recovered and Unrecovered Indentation This chapter lays the theoretical and practical foundation for hardness evaluation using both traditional and modern interpretations of indentation methods. It covers Brinell, Vickers, and Rockwell hardness calculations and extends these methods by introducing surface hardness analysis based on indentation geometry. It also explains Martens hardness and introduces spherical indentation as a tool for determining mechanical properties such as modulus, resistance, and energy dissipation in nano- and micro-ranges. Chapter 2: Selection of Materials, Instruments, and Research Methods The second chapter focuses on preparing for experimental investigations. It includes descriptions of the metal samples used (steel grades), the equipment setup for measuring surface hardness with spherical indenters, and the development of software tools for processing indentation data. This chapter ensures that the reader is fully equipped to carry out high-precision mechanical characterization. Chapter 3: Experimental Studies of Creep in the Nano and Micro Ranges This chapter presents detailed creep investigations conducted through time-dependent indentation experiments. Three different steel samples (steel 15, U10, and U10A) are studied using spherical indenters. The chapter explains the methodology for diagramming and calculating creep behavior and highlights how materials respond to sustained loading in ultra-small scales, revealing time-dependent deformation characteristics. Chapter 4: Experimental Studies of Surface Hardness in the Nano and Micro Ranges Here, the book focuses on evaluating how hardness changes with depth and load when using spherical indenters. The chapter includes plotting indentation force-depth curves and calculating surface hardness functions. It demonstrates the application of graphical analysis to real indentation data, showing how the surface mechanical response varies across different materials and indentation depths. Chapter 5: Final Values of Surface Hardness During Spherical Indenter Penetration Into Metal Samples This final research chapter consolidates the findings of previous sections. It provides summarized, validated surface hardness values obtained under controlled experimental conditions. It emphasizes the importance of penetration depth and indentation load, helping readers compare material performance across samples and methods. Conclusions and References The monograph concludes with a summary of key findings, confirming the reliability of modern spherical indentation methods in capturing mechanical behavior in the nano/micro regime. The list of references provides a rich set of scientific sources for further study. This monograph combines methodological rigor, experimental precision, and practical application. It reflects years of focused research and offers valuable insights into advanced hardness testing methods that bridge academic theory with industrial relevance.

• Format: Paperback
• Language: English
• ISBN: B0F624SZ6R
• ISBN13: 9798280966796
• Release Date: April 2025
• Publisher: Independently published
• Length: 117 Pages
• Dimensions: 9.0" x 0.3" x 6.0"