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Nano-indentation response of ultrahighmolecular weight polyethylene (UHMWPE)
- Source :
- Polymers, Volume 12, Issue 4, Polymers, Vol 12, Iss 795, p 795 (2020), Polymers, 12(4)
- Publication Year :
- 2020
-
Abstract
- Nano-indentation, a depth sensing technique, is a useful and exciting tool to investigate the surface mechanical properties of a wide range of materials, particularly polymers. Knowledge of the influence of experimental conditions employed during nano-indentation on the resultant nano-mechanical response is very important for the successful design of engineering components with appropriate surface properties. In this work, nano-indentation experiments were carried out by selecting various values of frequency, amplitude, contact depth, strain rate, holding time, and peak load. The results showed a significant effect of amplitude, frequency, and strain rate on the hardness and modulus of the considered polymer, ultrahigh molecular weight polyethylene (UHMWPE). Load-displacement curves showed a shift towards the lower indentation depths along with an increase in peak load by increasing the indentation amplitude or strain rate. The results also revealed the strong dependence of hardness and modulus on the holding time. The experimental data of creep depth as a function of holding time was successfully fitted with a logarithmic creep model (R2 &ge<br />0.98). In order to remove the creeping effect and the nose problem, recommended holding times were proposed for the investigated polymer as a function of different applied loads.
- Subjects :
- Work (thermodynamics)
Materials science
Polymers and Plastics
Nano-indentation
Modulus
02 engineering and technology
010402 general chemistry
01 natural sciences
Article
lcsh:QD241-441
Ultrahigh molecular weight polyethylene
lcsh:Organic chemistry
Hardness
Indentation
Composite material
chemistry.chemical_classification
General Chemistry
Polymer
Nanoindentation
Strain rate
Creep
021001 nanoscience & nanotechnology
0104 chemical sciences
Amplitude
chemistry
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 12
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....5e0a544fa0dc9893ac6ab17e5b7564b5