Identifying the stress–strain curve of materials by microimpact testing. Application on pure copper, pure iron, and aluminum alloy 6061-T651

The mechanical response of materials under repeated impact loading is of primary importance to model different types of surface mechanical treatments, such as shot peening. A reverse identification method of stress–strain curves using repeated impact has been developed by Kermouche et al. [Kermouche...

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Bibliographic Details
Published in:Journal of materials research 2015-07, Vol.30 (14), p.2222-2230
Main Authors: Al Baida, Halim, Langlade, Cécile, Kermouche, Guillaume, Ambriz, Ricardo Rafael
Format: Article
Language:English
Subjects:
Aluminum
Aluminum alloys
ALUMINUM ALLOYS (50 TO 99 AL)
Aluminum base alloys
Analysis
Applied and Technical Physics
Biomaterials
Copper
COPPER (PURE)
COPPER ALLOYS (40 TO 99.3 CU)
Copper base alloys
Deformation
Energy
Engineering Sciences
Identification methods
IMPACT PROPERTIES
Impact tests
Inorganic Chemistry
IRON (PURE)
Load
Materials Engineering
Materials research
Materials Science
Mechanical analysis
Mechanical properties
Mechanics
Mechanics of materials
Nanotechnology
Shear loading
STRAIN
Strain hardening
STRESS
STRESS STRAIN CURVES
Stress-strain relationships
Studies
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Summary:The mechanical response of materials under repeated impact loading is of primary importance to model different types of surface mechanical treatments, such as shot peening. A reverse identification method of stress–strain curves using repeated impact has been developed by Kermouche et al. [Kermouche et al., Mater. Sci. Eng., A 569, 71–77 (2013)] and later improved by Al Baida et al. [Al Baida et al., Mech. Mater. 86, 11–20 (2015)]. This study deals with the experimental validation of this method on three materials: a home-made pure iron, a commercially pure copper, and an industrial aluminum alloy. An approximate method derived from cone indentation theory to check the reverse method reliability. Balls of different sizes have been used to cover a wide enough range of strain. The results are also compared with macroscopic compression and traction tests. The effect of the strain rate on the stress–strain curve is discussed. The conclusion section highlights the rapidity and the ease of use of the reverse identification method.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2015.186