scholarly journals Cylindrical nano-indentation on metal film/elastic substrate system with discrete dislocation plasticity analysis: A simple model for nano-indentation size effect

2010 ◽  
Vol 47 (22-23) ◽  
pp. 3103-3114 ◽  
Author(s):  
Chaojun Ouyang ◽  
Zhenhuan Li ◽  
Minsheng Huang ◽  
Haidong Fan
Keyword(s):  
Simple Model ◽  
Size Effect ◽  
Metal Film ◽  
Indentation Size Effect ◽  
Indentation Size ◽  
Elastic Substrate ◽  
Nano Indentation ◽  
Discrete Dislocation ◽  
Dislocation Plasticity

A dislocation-based yield strength model for nano-indentation size effect

2021 ◽  
pp. 146442072199279
Author(s):  
Ping Tao ◽  
Fei Ye ◽  
Jianming Gong ◽  
Richard A Barrett ◽  
Seán B Leen
Keyword(s):  
Finite Element ◽  
Yield Strength ◽  
Size Effect ◽  
Finite Element Modelling ◽  
Indentation Size Effect ◽  
Dual Phase ◽  
Strength Model ◽  
Indentation Size ◽  
Element Modelling ◽  
Nano Indentation

This paper presents a dislocation-based yield strength model for the nano-indentation size effect. The model is based on functional expressions involving the densities of statistically stored dislocations and geometrically necessary dislocations. A single-phase austenitic stainless steel (316L) and a ferrite-austenite dual-phase steel (2205) are used here as the case-study materials to validate the proposed model. Experimental testing and finite element modelling of nano-indentation of the two materials are presented. Experimental tests are performed in the indentation load range from 1000[Formula: see text] to 10000[Formula: see text]. For 2205 steel, finite element modelling is performed using a dual-phase microstructure-based model. It is shown that, with consideration of statistically stored dislocations and geometrically necessary dislocations, finite element modelling results can reproduce measured load–displacement curves and hence, the size effect, within an error range of about 5%.

scholarly journals Investigation of the mechanism of the indentation size effect for titanium

2019 ◽  
Vol 6 (2) ◽  
pp. 18-00545-18-00545
Author(s):  
Shota HASUNUMA ◽  
Hirohisa MIYAZAKI ◽  
Takeshi OGAWA
Keyword(s):  
Size Effect ◽  
Indentation Size Effect ◽  
Indentation Size

Indentation size effect of cortical bones submitted to different soft tissue removals

2013 ◽  
Vol 20 ◽  
pp. 338-346 ◽  
Author(s):  
A. Bandini ◽  
D. Chicot ◽  
P. Berry ◽  
X. Decoopman ◽  
A. Pertuz ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Size Effect ◽  
Indentation Size Effect ◽  
Indentation Size

Further analysis of the size effect in indentation hardness tests of some metals

1995 ◽  
Vol 10 (11) ◽  
pp. 2908-2915 ◽  
Author(s):  
M. Atkinson
Keyword(s):  
Size Effect ◽  
Strain Hardening ◽  
Indentation Size Effect ◽  
Plastic Hinge ◽  
Small Scale ◽  
Indentation Hardness ◽  
Vickers Indentation ◽  
Indentation Size ◽  
Hardness Tests ◽  
Indentation Tests

The variation of apparent hardness observed in previously reported Vickers indentation tests of metals is reexamined. Common deseriptions of the effect are shown to be inaccurate: the variation of apparent hardness is monotonic but not simple. The effect is consistent with varying size of a previously postulated “plastic hinge” at the perimeter of the indent. This complexity confers uncertainty on the estimation of characteristic macrohardness from small scale tests. Association of the indentation size effect with friction and with strain hardening is confirmed.

Evaluating plastic flow properties by characterizing indentation size effect using a sharp indenter

2008 ◽  
Vol 56 (14) ◽  
pp. 3338-3343 ◽  
Author(s):  
Ju-Young Kim ◽  
Seung-Kyun Kang ◽  
Julia R. Greer ◽  
Dongil Kwon
Keyword(s):  
Size Effect ◽  
Plastic Flow ◽  
Indentation Size Effect ◽  
Flow Properties ◽  
Indentation Size
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