An indentation fatigue strength law

作者：Xu Baoxing; Yonezu Akio; Chen Xi^*

来源：Philosophical Magazine Letters, 2010, 90(5): 313-322.

DOI：10.1080/09500831003662495

• indentation fatigue
• fatigue strength
• failure
• acoustic emission
• thin films
• PVC

Indentation fatigue, where a cyclic load is applied on the sample via an indenter, emerges as an alternative approach for measuring the fatigue properties of materials. We have carried out indentation fatigue tests on a poly(vinyl chloride) (PVC) bulk material, as well as on TiN and NiP films/coatings deposited on SUS304 steel substrates, and demonstrate that a simple power-law relationship can be established between the indentation load amplitude and number of cycles to failure. Such a law is very similar to the conventional fatigue strength law obtained from uniaxial tests. The agreement between the fatigue stress exponents obtained by uniaxial and indentation fatigue tests suggests the potential applicability of the indentation fatigue technique for extracting the fatigue properties of materials.

• 出版日期2010