The effect of Ti on precipitation of fully coherent DO22 superlattice in an Ni-Cr-W-based superalloy

Xiangyu Gao; Rui Hu; Gongliao Luo

doi:10.1016/j.scriptamat.2017.02.037

The effect of Ti on precipitation of fully coherent DO₂₂ superlattice in an Ni-Cr-W-based superalloy

Xiangyu Gao, Rui Hu, Gongliao Luo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

20 Scopus citations

Abstract

The ordering reaction in the newly developed Ni-Cr-W-Ti alloy aged at 700 °C has been investigated using atom probe tomography and transmission electron microscopy. The results reveal that the existence of titanium in the superalloy induces and stabilizes the DO₂₂ superlattices, which cannot precipitate in the ternary Ni-Cr-W superalloy. The stoichiometry of the DO₂₂ phase has been determined to be Ni₃(Cr_0.2W_0.4Ti_0.4), and the interfaces between DO₂₂ precipitates and matrix have been revealed to be fully coherent at the atomic scale.

Original language	English
Pages (from-to)	15-19
Number of pages	5
Journal	Scripta Materialia
Volume	134
DOIs	https://doi.org/10.1016/j.scriptamat.2017.02.037
State	Published - 1 Jun 2017

Keywords

Atom probe tomography
DO superlattice
High resolution transmission electron microscopy
Ni-Cr-W-Ti superalloy

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10.1016/j.scriptamat.2017.02.037

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title = "The effect of Ti on precipitation of fully coherent DO22 superlattice in an Ni-Cr-W-based superalloy",

abstract = "The ordering reaction in the newly developed Ni-Cr-W-Ti alloy aged at 700 °C has been investigated using atom probe tomography and transmission electron microscopy. The results reveal that the existence of titanium in the superalloy induces and stabilizes the DO22 superlattices, which cannot precipitate in the ternary Ni-Cr-W superalloy. The stoichiometry of the DO22 phase has been determined to be Ni3(Cr0.2W0.4Ti0.4), and the interfaces between DO22 precipitates and matrix have been revealed to be fully coherent at the atomic scale.",

keywords = "Atom probe tomography, DO superlattice, High resolution transmission electron microscopy, Ni-Cr-W-Ti superalloy",

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T1 - The effect of Ti on precipitation of fully coherent DO22 superlattice in an Ni-Cr-W-based superalloy

AU - Gao, Xiangyu

AU - Hu, Rui

AU - Luo, Gongliao

PY - 2017/6/1

Y1 - 2017/6/1

N2 - The ordering reaction in the newly developed Ni-Cr-W-Ti alloy aged at 700 °C has been investigated using atom probe tomography and transmission electron microscopy. The results reveal that the existence of titanium in the superalloy induces and stabilizes the DO22 superlattices, which cannot precipitate in the ternary Ni-Cr-W superalloy. The stoichiometry of the DO22 phase has been determined to be Ni3(Cr0.2W0.4Ti0.4), and the interfaces between DO22 precipitates and matrix have been revealed to be fully coherent at the atomic scale.

AB - The ordering reaction in the newly developed Ni-Cr-W-Ti alloy aged at 700 °C has been investigated using atom probe tomography and transmission electron microscopy. The results reveal that the existence of titanium in the superalloy induces and stabilizes the DO22 superlattices, which cannot precipitate in the ternary Ni-Cr-W superalloy. The stoichiometry of the DO22 phase has been determined to be Ni3(Cr0.2W0.4Ti0.4), and the interfaces between DO22 precipitates and matrix have been revealed to be fully coherent at the atomic scale.

KW - Atom probe tomography

KW - DO superlattice

KW - High resolution transmission electron microscopy

KW - Ni-Cr-W-Ti superalloy

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DO - 10.1016/j.scriptamat.2017.02.037

M3 - 文章

AN - SCOPUS:85015412177

SN - 1359-6462

VL - 134

SP - 15

EP - 19

JO - Scripta Materialia

JF - Scripta Materialia

ER -

The effect of Ti on precipitation of fully coherent DO₂₂ superlattice in an Ni-Cr-W-based superalloy

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