Micromechanical and Indentation Methods

Course guarantor:

Lecturer:

Tutor:

Supervisor:

Department of Materials

Synopsis:

Aim of the course is to present to the students the methods of determination of materials mechanical properties in the micro-volume. The course will focus mainly on the penetration methods (classical hardness tests and nanoindentation, small punch test, scratch tests, etc.). In-situ methods which enable direct observation of micromechanical tests (micropillar compression, microcantilever bending, etc.) in electron microscopes forms the second topic of the course. The practical measurements are the essential part of the course. At the end of the course, the students should be able to choose the appropriate technique (taking into account the advantages and limitations of individual methods) for characterization of the properties of investigated materials/components.

Requirements:

basic knowledge of materials mechanical properties, testing and characterization

Syllabus of lectures:

1. Introduction to hardness and microhardness measurement. Classic hardness measurement methods.

2. Indenters and the indentation process. Instruments, measurement methodology and sources of the errors.

3. Hertz contact theory, Sneddon's solution.

4. Nanoindentation (instrumented indentation).

5. Characterization of thin films.

6. Small punch test.

7. Scratch tests.

8. In-situ methods (micropillar compression, microcantilever bending).

9. Interpretation of the measurement results.

10. Practical measurements.

Syllabus of tutorials:

Study Objective:

Study materials:

Key references:

[1] A.C. Fischer-Cripps: Nanoindentation, 3rd ed., New York: Springer, 2011.

[2] L. Chen: Micro-Nanoindentation in Materials Science, NY Research Press, 2015.

[3] G. Dehm, B.N. Jaya, R. Raghavan, C. Kirchlechner: Overview on micro- and nanomechanical testing: New insights in interface plasticity and fracture at small length scales, Acta Materialia, 142 (2018), 248-282.

Recommended references:

[1] J. Němeček: Nanoindentation in Materials Science [online]. InTech, 2012.

[1] F. Yang, J.C.M. Li: Micro and Nano Mechanical Testing of Materials and Devices, Springer US, 2008.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Fyzikální inženýrství materiálů (compulsory course in the program)