Mechanical properties of microconstituents in Nb-Si-Ti alloy by micropillar compression and nanoindentation

Enyu Guo; Sudhanshu S. Singh; Chandrashekara S. Kaira; Xianyu Meng; Yanjin Xu; Liangshun Luo; Mingyue Wang; Nikhilesh Chawla

doi:10.1016/j.msea.2017.01.058

Mechanical properties of microconstituents in Nb-Si-Ti alloy by micropillar compression and nanoindentation

Enyu Guo
, Sudhanshu S. Singh
, Chandrashekara S. Kaira
, Xianyu Meng
, Yanjin Xu
, Liangshun Luo
, Mingyue Wang^*
, Nikhilesh Chawla

^*Corresponding author for this work

Arizona State University
Indian Institute of Technology Kanpur
Harbin Institute of Technology
China Aviation Industry Corporation
Beihang University

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

33 Scopus citations

Abstract

The micromechanical properties of both Nb solid solution (Nbss) and (Nb,Ti)₃Si silicide in a ternary Nb-16Si-22Ti (in at%) alloy were evaluated by nanoindentation and micropillar compression techniques. Nanoindentation tests showed that (Nb,Ti)₃Si possesses much higher hardness (15.6±0.6 GPa) and Young's modulus (253.3±8.4 GPa) than Nbss (5.2±0.4 GPa and 124.9±5.1 GPa, respectively). Stress-strain curves of each constituent were obtained by micropillar compression. The stress-strain behavior showed that (Nb,Ti)₃Si exhibited a brittle fracture mode, while Nbss was able to bear large ductile deformation. The compressive failure strength of (Nb,Ti)₃Si intermetallic and yield strength of Nbss were found to be 8.4±1.2 GPa and 0.9±0.1 GPa, respectively. The fracture toughness of the (Nb,Ti)₃Si phase evaluated by cracks emanating from nanoindentation, was measured to be ~2.3 MPa-m^1/2.

Original language	English
Pages (from-to)	99-106
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	687
DOIs	https://doi.org/10.1016/j.msea.2017.01.058
State	Published - 27 Feb 2017
Externally published	Yes

Keywords

Fracture toughness
High temperature alloy
Intermetallics
Mechanical properties
Micropillar compression

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10.1016/j.msea.2017.01.058

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@article{367462e0a8b94529bd7d1c1b9708346e,

title = "Mechanical properties of microconstituents in Nb-Si-Ti alloy by micropillar compression and nanoindentation",

abstract = "The micromechanical properties of both Nb solid solution (Nbss) and (Nb,Ti)3Si silicide in a ternary Nb-16Si-22Ti (in at\%) alloy were evaluated by nanoindentation and micropillar compression techniques. Nanoindentation tests showed that (Nb,Ti)3Si possesses much higher hardness (15.6±0.6 GPa) and Young's modulus (253.3±8.4 GPa) than Nbss (5.2±0.4 GPa and 124.9±5.1 GPa, respectively). Stress-strain curves of each constituent were obtained by micropillar compression. The stress-strain behavior showed that (Nb,Ti)3Si exhibited a brittle fracture mode, while Nbss was able to bear large ductile deformation. The compressive failure strength of (Nb,Ti)3Si intermetallic and yield strength of Nbss were found to be 8.4±1.2 GPa and 0.9±0.1 GPa, respectively. The fracture toughness of the (Nb,Ti)3Si phase evaluated by cracks emanating from nanoindentation, was measured to be \textasciitilde{}2.3 MPa-m1/2.",

keywords = "Fracture toughness, High temperature alloy, Intermetallics, Mechanical properties, Micropillar compression",

author = "Enyu Guo and Singh, \{Sudhanshu S.\} and Kaira, \{Chandrashekara S.\} and Xianyu Meng and Yanjin Xu and Liangshun Luo and Mingyue Wang and Nikhilesh Chawla",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = feb,

day = "27",

doi = "10.1016/j.msea.2017.01.058",

language = "英语",

volume = "687",

pages = "99--106",

journal = "Materials Science and Engineering: A",

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TY - JOUR

T1 - Mechanical properties of microconstituents in Nb-Si-Ti alloy by micropillar compression and nanoindentation

AU - Guo, Enyu

AU - Singh, Sudhanshu S.

AU - Kaira, Chandrashekara S.

AU - Meng, Xianyu

AU - Xu, Yanjin

AU - Luo, Liangshun

AU - Wang, Mingyue

AU - Chawla, Nikhilesh

PY - 2017/2/27

Y1 - 2017/2/27

N2 - The micromechanical properties of both Nb solid solution (Nbss) and (Nb,Ti)3Si silicide in a ternary Nb-16Si-22Ti (in at%) alloy were evaluated by nanoindentation and micropillar compression techniques. Nanoindentation tests showed that (Nb,Ti)3Si possesses much higher hardness (15.6±0.6 GPa) and Young's modulus (253.3±8.4 GPa) than Nbss (5.2±0.4 GPa and 124.9±5.1 GPa, respectively). Stress-strain curves of each constituent were obtained by micropillar compression. The stress-strain behavior showed that (Nb,Ti)3Si exhibited a brittle fracture mode, while Nbss was able to bear large ductile deformation. The compressive failure strength of (Nb,Ti)3Si intermetallic and yield strength of Nbss were found to be 8.4±1.2 GPa and 0.9±0.1 GPa, respectively. The fracture toughness of the (Nb,Ti)3Si phase evaluated by cracks emanating from nanoindentation, was measured to be ~2.3 MPa-m1/2.

AB - The micromechanical properties of both Nb solid solution (Nbss) and (Nb,Ti)3Si silicide in a ternary Nb-16Si-22Ti (in at%) alloy were evaluated by nanoindentation and micropillar compression techniques. Nanoindentation tests showed that (Nb,Ti)3Si possesses much higher hardness (15.6±0.6 GPa) and Young's modulus (253.3±8.4 GPa) than Nbss (5.2±0.4 GPa and 124.9±5.1 GPa, respectively). Stress-strain curves of each constituent were obtained by micropillar compression. The stress-strain behavior showed that (Nb,Ti)3Si exhibited a brittle fracture mode, while Nbss was able to bear large ductile deformation. The compressive failure strength of (Nb,Ti)3Si intermetallic and yield strength of Nbss were found to be 8.4±1.2 GPa and 0.9±0.1 GPa, respectively. The fracture toughness of the (Nb,Ti)3Si phase evaluated by cracks emanating from nanoindentation, was measured to be ~2.3 MPa-m1/2.

KW - Fracture toughness

KW - High temperature alloy

KW - Intermetallics

KW - Mechanical properties

KW - Micropillar compression

UR - https://www.scopus.com/pages/publications/85010457005

U2 - 10.1016/j.msea.2017.01.058

DO - 10.1016/j.msea.2017.01.058

M3 - 文章

AN - SCOPUS:85010457005

SN - 0921-5093

VL - 687

SP - 99

EP - 106

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Mechanical properties of microconstituents in Nb-Si-Ti alloy by micropillar compression and nanoindentation

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Keywords

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