Indentation size effect in steels with different carbon contents and microstructures

被引：6

作者：

Sarangi, Soumya Sourav ^{[1
]}

Lavakumar, Avala ^{[2
,3
]}

Singh, Prince Kumar ^{[4
]}

Katiyar, Prvan Kumar ^{[5
]}

Ray, Ranjit Kumar ^{[6
]}

机构：

[1] Indian Inst Technol Madras, Dept Met & Mat Engn, Chennai, Tamil Nadu, India

[2] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[3] Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 8168580, Japan

[4] Indian Inst Technol, Dept Met & Mat Engn, Ropar, India

[5] Natl Inst Technol, Dept Met & Mat Sci Engn, Srinagar, Jammu & Kashmir, India

[6] SRMIST, Chennai, Tamil Nadu, India

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2023年 / 39卷 / 03期

关键词：

Indentation size effect; micro-hardness; Nix and Gao model; true hardness; Minimum Resistance model; PSR model; STRAIN GRADIENT PLASTICITY; METALLIC MATERIALS; GRAIN-SIZE; HARDNESS; MICROHARDNESS; NANOINDENTATION; LOAD; MICROINDENTATION; DEPENDENCE; STRENGTH;

D O I：

10.1080/02670836.2022.2113157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Indentation Size Effect (ISE) in steels having a wide spectrum of carbon (C) concentrations (wt-%) 0.002 (interstitial-free), 0.07 (microalloyed), 0.19 (low carbon), 0.32 (medium carbon), and 0.7 (high carbon), and microstructures were investigated using Vickers micro-hardness tester. A decrease in micro-hardness with increasing load, i.e. ISE, is observed in all the samples except microalloyed steel. The empirical relations, such as the Nix and Gao model, Minimum Resistance model, and Proportional Specimen Resistance (PSR) model, were used to determine the load-independent or true hardness values. Nix and Gao model was adopted to determine the plastically deformed zone (PDZ) size under the indenter and subsequently correlated with ISE in the materials. It is observed that ISE is absent when the PDZ size becomes comparable to or larger than the grain size of the material.

引用

页码：338 / 346

页数：9

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