This chapter discusses the history of hardness testing and defines the term hardness. It describes the interrelationship between material structure and hardness and the relationships between hardness and other mechanical material properties. In addition, information on the hardness unit and traceability of the hardness measurement are provided.
K. Herrmann, The Fundamentals of Hardness Testing, Hardness Testing: Principles and Applications, Edited By Konrad Herrmann, ASM International, 2011, p 1–23, https://doi.org/10.31399/asm.tb.htpa.t53310001
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