Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers

Y. F. Zhang; R. Su; T. J. Niu; N. A. Richter; S. Xue; Q. Li; Jie Ding; Bo Yang; H. Wang; X. Zhang

doi:10.1016/j.scriptamat.2020.04.015

Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers

Y. F. Zhang
, R. Su
, T. J. Niu
, N. A. Richter
, S. Xue
, Q. Li
, Jie Ding
, Bo Yang
, H. Wang
, X. Zhang

Purdue University

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

34 Scopus citations

Abstract

Recent studies showed that nanotwinned Al/Ti multilayers have outstanding mechanical properties at room temperature. However, the thermal stability of these multilayers remains unclear. Here, we show that after annealing at 400 °C, nanotwinned Al/Ti multilayers demonstrate excellent thermal stability and limited intermixing when individual layer thickness exceeds 22 nm. Whereas nanolayers of TiAl formed in the annealed Al/Ti 4.5 nm multilayer. Annealing induced substantial hardening, and the magnitude of hardening is greater at smaller layer thickness. In situ micropillar compression tests show the annealed Al/Ti multilayers have high flow stress (exceeding 3 GPa), work hardening capability, and good deformability.

Original language	English
Pages (from-to)	219-224
Number of pages	6
Journal	Scripta Materialia
Volume	186
DOIs	https://doi.org/10.1016/j.scriptamat.2020.04.015
State	Published - Sep 2020
Externally published	Yes

Keywords

Al/Ti multilayers
In situ micropillar compression
Thermal stability

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10.1016/j.scriptamat.2020.04.015

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title = "Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers",

abstract = "Recent studies showed that nanotwinned Al/Ti multilayers have outstanding mechanical properties at room temperature. However, the thermal stability of these multilayers remains unclear. Here, we show that after annealing at 400 °C, nanotwinned Al/Ti multilayers demonstrate excellent thermal stability and limited intermixing when individual layer thickness exceeds 22 nm. Whereas nanolayers of TiAl formed in the annealed Al/Ti 4.5 nm multilayer. Annealing induced substantial hardening, and the magnitude of hardening is greater at smaller layer thickness. In situ micropillar compression tests show the annealed Al/Ti multilayers have high flow stress (exceeding 3 GPa), work hardening capability, and good deformability.",

keywords = "Al/Ti multilayers, In situ micropillar compression, Thermal stability",

author = "Zhang, \{Y. F.\} and R. Su and Niu, \{T. J.\} and Richter, \{N. A.\} and S. Xue and Q. Li and Jie Ding and Bo Yang and H. Wang and X. Zhang",

note = "Publisher Copyright: {\textcopyright} 2020",

year = "2020",

month = sep,

doi = "10.1016/j.scriptamat.2020.04.015",

language = "英语",

volume = "186",

pages = "219--224",

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TY - JOUR

T1 - Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers

AU - Zhang, Y. F.

AU - Su, R.

AU - Niu, T. J.

AU - Richter, N. A.

AU - Xue, S.

AU - Li, Q.

AU - Ding, Jie

AU - Yang, Bo

AU - Wang, H.

AU - Zhang, X.

PY - 2020/9

Y1 - 2020/9

N2 - Recent studies showed that nanotwinned Al/Ti multilayers have outstanding mechanical properties at room temperature. However, the thermal stability of these multilayers remains unclear. Here, we show that after annealing at 400 °C, nanotwinned Al/Ti multilayers demonstrate excellent thermal stability and limited intermixing when individual layer thickness exceeds 22 nm. Whereas nanolayers of TiAl formed in the annealed Al/Ti 4.5 nm multilayer. Annealing induced substantial hardening, and the magnitude of hardening is greater at smaller layer thickness. In situ micropillar compression tests show the annealed Al/Ti multilayers have high flow stress (exceeding 3 GPa), work hardening capability, and good deformability.

AB - Recent studies showed that nanotwinned Al/Ti multilayers have outstanding mechanical properties at room temperature. However, the thermal stability of these multilayers remains unclear. Here, we show that after annealing at 400 °C, nanotwinned Al/Ti multilayers demonstrate excellent thermal stability and limited intermixing when individual layer thickness exceeds 22 nm. Whereas nanolayers of TiAl formed in the annealed Al/Ti 4.5 nm multilayer. Annealing induced substantial hardening, and the magnitude of hardening is greater at smaller layer thickness. In situ micropillar compression tests show the annealed Al/Ti multilayers have high flow stress (exceeding 3 GPa), work hardening capability, and good deformability.

KW - Al/Ti multilayers

KW - In situ micropillar compression

KW - Thermal stability

UR - https://www.scopus.com/pages/publications/85085741542

U2 - 10.1016/j.scriptamat.2020.04.015

DO - 10.1016/j.scriptamat.2020.04.015

M3 - 文章

AN - SCOPUS:85085741542

SN - 1359-6462

VL - 186

SP - 219

EP - 224

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers

Abstract

Keywords

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