The Indentation Size Effect (ISE) and the Speed of the Indenter Penetration into Test Piece

Petrík, Jozef; Palfy, Pavol; Blaško, Peter; Girmanová, Lenka; Havlik, Milan

doi:10.21062/ujep/x.2016/a/1213-2489/mt/16/4/771

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…The same operator measured the micro-hardness of selected areas on the metallographic surface of the sample according to the standard ISO 6507-1:2018 [1]. The applied loads P were 0.09807 N, 0.24518 N, 0.49035 N, and 0.9807 N with a load duration of 15 s. The speed of the indenter's penetration was calculated using the method described in [25]. The values of the speed (v, in µm s −1 ) are shown in Table 1.…”

Section: Polishing Time (S)mentioning

confidence: 99%

The Relationship between Polishing Method and ISE Effect

Petrík,

Blaško,

Draganovská

et al. 2023

Crystals

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The aim of the submitted work is to study the relationship between the method of polishing the metallurgical surface and the indentation size effect (ISE). The material of the sample was annealed 99.5% aluminum. The polishing time ranged between 300 and 3600 s. An aqueous emulsion of aluminum oxide (spineline) and diamond paste were used as the polishing agents. The surface quality of the samples was measured with roughness meters. Applied loads in the micro-hardness test were 0.0981, 0.2452, 0.4904, and 0.9807 N. The effect of polishing on micro-hardness, Meyer’s index n, and ISE characteristics was evaluated using the PSR method and the Hays–Kendall approach. As the polishing time increases, the micro-hardness values decrease, and the value of Meyer’s index n increases from “normal” to neutral, i.e., Kick’s law applies. The finding was confirmed for both of the used polishing agents.

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Section: Polishing Time (S)mentioning

confidence: 99%

The Relationship between Polishing Method and ISE Effect

Petrík,

Blaško,

Draganovská

et al. 2023

Crystals

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Influence of testers on the ISE effect

et al. 2022

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In the micro-hardness range of the load, the measurement is complicated by the occurrence of the Indentation Size Effect (ISE) – the measured value of the micro-hardness is affected by the value of the applied load. The paper aims to study the influence of the automatic testers on the character type and size of the ISE. Ten testers and five standard reference blocks were involved in the “round-robin test”. Parameters of the ISE were evaluated using Meyer’s, Hays–Kendall, and PSR methods and also by statistical methods (ANOVA, t-test, regression, and cluster analysis). Despite the assumptions, a statistically significant impact of the hardness tester was found not only on the measured value but also on the character and size of ISE.

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The Indentation Size Effect (ISE) of Metals

et al. 2022

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The literature regarding the Reverse Indentation Size Effect (RISE) is scarce, the occurrence of which is assumed for plastic materials, including metals. The content of this article is to study the relationship between applied load and measured values of the Vickers micro-hardness of 19 metals with different types of lattices, measured with a Hanemann tester. The values of the load ranged between 0.09807 N (10 g) and 0.9807 N (100 g). The size and character of the Indentation Size Effect (ISE) were evaluated by Meyer’s power law (index n), Proportional Specimen Resistance (PSR), and Hays—Kendall methods. Meyer’s index n ranged between 1.65 for Mo and 2.44 for Ni. A correlation was found between the micro-hardness and Meyer’s index for metals with FCC and HCP lattices. The measured value of Vickers micro-hardness is influenced by the size and nature of the ISE. If this is not taken into account, it may be misleading. For this reason, we recommend using the “true hardness”, determined by the presented method.

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The Indentation Size Effect (ISE) and the Speed of the Indenter Penetration into Test Piece

Cited by 3 publications

References 15 publications

The Relationship between Polishing Method and ISE Effect

The Relationship between Polishing Method and ISE Effect

Influence of testers on the ISE effect

The Indentation Size Effect (ISE) of Metals

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