4.6 Article

Flat-Top Cylinder Indenter for Mechanical Characterization: A Report of Industrial Applications

期刊

MATERIALS
卷 14, 期 7, 页码 -

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MDPI
DOI: 10.3390/ma14071742

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indentation test; FIMEC; material characterization; mechanical properties; industrial application

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FIMEC is an instrumental indentation test utilizing a cylindrical punch to determine the mechanical properties of metallic materials. Through experimental tests and theoretical knowledge, FIMEC has become a mature technique with great versatility for industrial applications, providing valuable information not obtainable through conventional methods like tensile, bending, and hardness tests.
FIMEC (flat-top cylinder indenter for mechanical characterisation) is an instrumented indentation test employing a cylindrical punch. It has been used to determine the mechanical properties of metallic materials in several applications of industrial interest. This work briefly describes the technique and the theory of indentation with a flat-ended punch. The flat indentation of metals has been investigated through experimental tests, and an equation has been derived to calculate the yield stress from the experimental data in deep indentation. The approach is supported by many data on various metals and alloys. Some selected case studies are presented in the paper: (i) crank manufacturing through pin squeeze casting; (ii) the evaluation of the local mechanical properties in a carter of complex geometry; (iii) the qualification of Al billets for extrusion; (iv) stress-relaxation tests on CuCrZr heat sinks; (v) the characterization of thick W coatings on CuCrZr alloy; (vi) the measure of the local mechanical properties of the molten-zone (MZ) and the heat-affected zone (HAZ) in welded joints. The case studies demonstrate the great versatility of the FIMEC test which provides information not available by employing conventional experimental techniques such as tensile, bending, and hardness tests. On the basis of theoretical knowledge and large amount of experimental data, FIMEC has become a mature technique for application on a large scale in industrial practice.

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