Strain rate dependence of the indentation size effect in Ti–10V–2Fe–3Al alloy

Xinkai Ma; Fuguo Li; Zhankun Sun; Junhua Hou; Jinghui Li; Xiaotian Fang

doi:10.1080/02670836.2019.1612596

Strain rate dependence of the indentation size effect in Ti–10V–2Fe–3Al alloy

Xinkai Ma, Fuguo Li, Zhankun Sun, Junhua Hou, Jinghui Li, Xiaotian Fang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

The influence of strain rates on the indentation size effect (ISE) was explored experimentally. A strong ISE phenomenon on the hardness of Ti–10V–2Fe–3Al (Ti-1023) alloy was found when the peak-load was less than 3500 mN, regardless of the variation of loading rates. However, as indenter strain rates increased, the degree of ISE reduced considerably, which was related to the decrease of the internal indentation length scale ranging from 23.08 to 6.80 µm. Furthermore, a positive strain rate sensitivity of the hardness in the whole peak-load range was found in Ti-1023 alloy, which showed a linear function of indenter load. The underlying mechanism was well explained by the variation of geometrically necessary dislocation and statistically stored dislocations in Ti-1023 alloy.

Original language	English
Pages (from-to)	1107-1113
Number of pages	7
Journal	Materials Science and Technology
Volume	35
Issue number	9
DOIs	https://doi.org/10.1080/02670836.2019.1612596
State	Published - 13 Jun 2019

Keywords

dislocation density
indentation size effect
micro-indentation
strain rate sensitivity
Titanium alloys

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title = "Strain rate dependence of the indentation size effect in Ti–10V–2Fe–3Al alloy",

abstract = "The influence of strain rates on the indentation size effect (ISE) was explored experimentally. A strong ISE phenomenon on the hardness of Ti–10V–2Fe–3Al (Ti-1023) alloy was found when the peak-load was less than 3500 mN, regardless of the variation of loading rates. However, as indenter strain rates increased, the degree of ISE reduced considerably, which was related to the decrease of the internal indentation length scale ranging from 23.08 to 6.80 µm. Furthermore, a positive strain rate sensitivity of the hardness in the whole peak-load range was found in Ti-1023 alloy, which showed a linear function of indenter load. The underlying mechanism was well explained by the variation of geometrically necessary dislocation and statistically stored dislocations in Ti-1023 alloy.",

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author = "Xinkai Ma and Fuguo Li and Zhankun Sun and Junhua Hou and Jinghui Li and Xiaotian Fang",

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T1 - Strain rate dependence of the indentation size effect in Ti–10V–2Fe–3Al alloy

AU - Ma, Xinkai

AU - Li, Fuguo

AU - Sun, Zhankun

AU - Hou, Junhua

AU - Li, Jinghui

AU - Fang, Xiaotian

PY - 2019/6/13

Y1 - 2019/6/13

N2 - The influence of strain rates on the indentation size effect (ISE) was explored experimentally. A strong ISE phenomenon on the hardness of Ti–10V–2Fe–3Al (Ti-1023) alloy was found when the peak-load was less than 3500 mN, regardless of the variation of loading rates. However, as indenter strain rates increased, the degree of ISE reduced considerably, which was related to the decrease of the internal indentation length scale ranging from 23.08 to 6.80 µm. Furthermore, a positive strain rate sensitivity of the hardness in the whole peak-load range was found in Ti-1023 alloy, which showed a linear function of indenter load. The underlying mechanism was well explained by the variation of geometrically necessary dislocation and statistically stored dislocations in Ti-1023 alloy.

AB - The influence of strain rates on the indentation size effect (ISE) was explored experimentally. A strong ISE phenomenon on the hardness of Ti–10V–2Fe–3Al (Ti-1023) alloy was found when the peak-load was less than 3500 mN, regardless of the variation of loading rates. However, as indenter strain rates increased, the degree of ISE reduced considerably, which was related to the decrease of the internal indentation length scale ranging from 23.08 to 6.80 µm. Furthermore, a positive strain rate sensitivity of the hardness in the whole peak-load range was found in Ti-1023 alloy, which showed a linear function of indenter load. The underlying mechanism was well explained by the variation of geometrically necessary dislocation and statistically stored dislocations in Ti-1023 alloy.

KW - dislocation density

KW - indentation size effect

KW - micro-indentation

KW - strain rate sensitivity

KW - Titanium alloys

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SP - 1107

EP - 1113

JO - Materials Science and Technology

JF - Materials Science and Technology

IS - 9

ER -

Strain rate dependence of the indentation size effect in Ti–10V–2Fe–3Al alloy

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Keywords

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