Assessing Strain Rate Sensitivity of Nanotwinned Al–Zr Alloys through Nanoindentation

Nicholas Allen Richter; Xuanyu Sheng; Bo Yang; Benjamin Thomas Stegman; Haiyan Wang; Xinghang Zhang

doi:10.3390/cryst13020276

Assessing Strain Rate Sensitivity of Nanotwinned Al–Zr Alloys through Nanoindentation

Nicholas Allen Richter, Xuanyu Sheng, Bo Yang, Benjamin Thomas Stegman, Haiyan Wang, Xinghang Zhang

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

Abstract

Nanotwinned metals have exhibited many enhanced physical and mechanical properties. Twin boundaries have recently been introduced into sputtered Al alloys in spite of their high stacking fault energy. These twinned Al alloys possess unique microstructures composed of vertically aligned Σ3(112) incoherent twin boundaries (ITBs) and have demonstrated remarkable mechanical strengths and thermal stability. However, their strain rate sensitivity has not been fully assessed. A modified nanoindentation method has been employed here to accurately determine the strain rate sensitivity of nanotwinned Al–Zr alloys. The hardness of these alloys reaches 4.2 GPa while simultaneously exhibiting an improved strain rate sensitivity. The nanotwinned Al–Zr alloys have shown grain size-dependent strain rate sensitivity, consistent with previous findings in the literature. This work provides insight into a previously unstudied aspect of nanotwinned Al alloys.

Original language	English
Article number	276
Journal	Crystals
Volume	13
Issue number	2
DOIs	https://doi.org/10.3390/cryst13020276
State	Published - Feb 2023
Externally published	Yes

Funding

This project is primarily funded by DoE-BES (Basic Energy Sciences) under grant no. DE-SC0016337. The ASTAR crystal orientation system in the TEM microscope is supported by ONR-DURIP award N00014-17-1-2921. Access to the Microscopy Facilities at Purdue University and the Center for Integrated Nanotechnologies (managed by Los Alamos National Laboratory) is also acknowledged.

Funders	Funder number
Basic Energy Sciences	N00014-17-1-2921, DE-SC0016337
Purdue University
Los Alamos National Laboratory
Center for Integrated Nanotechnologies

Keywords

aluminum alloys
nanoindentation
nanotwinned metals
strain rate sensitivity
transmission electron microscopy

Access to Document

10.3390/cryst13020276

Cite this

@article{41d332755afc48159cf4e37ce920371a,

title = "Assessing Strain Rate Sensitivity of Nanotwinned Al–Zr Alloys through Nanoindentation",

abstract = "Nanotwinned metals have exhibited many enhanced physical and mechanical properties. Twin boundaries have recently been introduced into sputtered Al alloys in spite of their high stacking fault energy. These twinned Al alloys possess unique microstructures composed of vertically aligned Σ3(112) incoherent twin boundaries (ITBs) and have demonstrated remarkable mechanical strengths and thermal stability. However, their strain rate sensitivity has not been fully assessed. A modified nanoindentation method has been employed here to accurately determine the strain rate sensitivity of nanotwinned Al–Zr alloys. The hardness of these alloys reaches 4.2 GPa while simultaneously exhibiting an improved strain rate sensitivity. The nanotwinned Al–Zr alloys have shown grain size-dependent strain rate sensitivity, consistent with previous findings in the literature. This work provides insight into a previously unstudied aspect of nanotwinned Al alloys.",

keywords = "aluminum alloys, nanoindentation, nanotwinned metals, strain rate sensitivity, transmission electron microscopy",

author = "Richter, {Nicholas Allen} and Xuanyu Sheng and Bo Yang and Stegman, {Benjamin Thomas} and Haiyan Wang and Xinghang Zhang",

note = "Publisher Copyright: {\textcopyright} 2023 by the authors.",

year = "2023",

month = feb,

doi = "10.3390/cryst13020276",

language = "English",

volume = "13",

journal = "Crystals",

issn = "2073-4352",

publisher = "MDPI",

number = "2",

}

TY - JOUR

T1 - Assessing Strain Rate Sensitivity of Nanotwinned Al–Zr Alloys through Nanoindentation

AU - Richter, Nicholas Allen

AU - Sheng, Xuanyu

AU - Yang, Bo

AU - Stegman, Benjamin Thomas

AU - Wang, Haiyan

AU - Zhang, Xinghang

PY - 2023/2

Y1 - 2023/2

N2 - Nanotwinned metals have exhibited many enhanced physical and mechanical properties. Twin boundaries have recently been introduced into sputtered Al alloys in spite of their high stacking fault energy. These twinned Al alloys possess unique microstructures composed of vertically aligned Σ3(112) incoherent twin boundaries (ITBs) and have demonstrated remarkable mechanical strengths and thermal stability. However, their strain rate sensitivity has not been fully assessed. A modified nanoindentation method has been employed here to accurately determine the strain rate sensitivity of nanotwinned Al–Zr alloys. The hardness of these alloys reaches 4.2 GPa while simultaneously exhibiting an improved strain rate sensitivity. The nanotwinned Al–Zr alloys have shown grain size-dependent strain rate sensitivity, consistent with previous findings in the literature. This work provides insight into a previously unstudied aspect of nanotwinned Al alloys.

AB - Nanotwinned metals have exhibited many enhanced physical and mechanical properties. Twin boundaries have recently been introduced into sputtered Al alloys in spite of their high stacking fault energy. These twinned Al alloys possess unique microstructures composed of vertically aligned Σ3(112) incoherent twin boundaries (ITBs) and have demonstrated remarkable mechanical strengths and thermal stability. However, their strain rate sensitivity has not been fully assessed. A modified nanoindentation method has been employed here to accurately determine the strain rate sensitivity of nanotwinned Al–Zr alloys. The hardness of these alloys reaches 4.2 GPa while simultaneously exhibiting an improved strain rate sensitivity. The nanotwinned Al–Zr alloys have shown grain size-dependent strain rate sensitivity, consistent with previous findings in the literature. This work provides insight into a previously unstudied aspect of nanotwinned Al alloys.

KW - aluminum alloys

KW - nanoindentation

KW - nanotwinned metals

KW - strain rate sensitivity

KW - transmission electron microscopy

UR - http://www.scopus.com/inward/record.url?scp=85149220575&partnerID=8YFLogxK

U2 - 10.3390/cryst13020276

DO - 10.3390/cryst13020276

M3 - Article

AN - SCOPUS:85149220575

SN - 2073-4352

VL - 13

JO - Crystals

JF - Crystals

IS - 2

M1 - 276

ER -

Assessing Strain Rate Sensitivity of Nanotwinned Al–Zr Alloys through Nanoindentation

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this