What is it about?
A systematic method to determine the stress-strain response of a material using a microindentation test is presented. The method is high throughput and requires minimal material. This work more clearly defines the meaning of the constraint factor that is needed to relate the indentation stress-strain response to the conventional uniaxial stress-strain response that engineers typically desire.
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Why is it important?
Unlike a conventional hardness test that just provides a hardness number after extensive plastic deformation, this method provides the elastic modulus, yield strength, and strain hardening behavior from analyzing the data obtained in an indentation test.
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This page is a summary of: On the Constraint Factor Relating Uniaxial and Indentation Yield Strength of Polycrystalline Materials Using Spherical Microindentation, Materials Performance and Characterization, January 2020, ASTM International,
DOI: 10.1520/mpc20190260.
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