Effect of oxygen on microstructure of Ni-43Ti-7Al alloy

L. Zhou; L. J. Zheng; H. R. Zhang; H. Zhang

doi:10.1179/1433075X11Y.0000000043

Effect of oxygen on microstructure of Ni-43Ti-7Al alloy

L. Zhou
, L. J. Zheng
, H. R. Zhang
, H. Zhang^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

15 Scopus citations

Abstract

The microstructures of Ni-43Ti-7Al (at-%) alloys containing different oxygen contents have been investigated. It has been found that the volume fraction of Ti2Ni increases with increasing oxygen. In the sample with oxygen content of 6000 wt ppm, the formation of B2 phase is suppressed, and the Ti ₂Ni phase solidifies as the primary phase. Thus, oxygen will have a strong effect on the microstructures of Ni-43Ti-7Al alloys. Furthermore, in Ni-43Ti-7Al-0.05Y and Ni-43Ti-7Al-0.15Y alloys, the volume fraction of Ti2Ni decreases, and a small amount of Y ₂O ₃ can be observed compared with the Y free alloys, which further verifies the effect of oxygen on the Ti2Ni phase. Finally, the possible mechanism for the role of oxygen on the Ti ₂Ni phase is discussed.

Original language	English
Pages (from-to)	115-120
Number of pages	6
Journal	Materials Research Innovations
Volume	16
Issue number	2
DOIs	https://doi.org/10.1179/1433075X11Y.0000000043
State	Published - 2012

Keywords

Microstructure
NiTi-Al alloy
Nucleation
Oxygen
Ti Ni phase

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10.1179/1433075X11Y.0000000043

Cite this

@article{b9fca054d0874868ba883cefa8b53304,

title = "Effect of oxygen on microstructure of Ni-43Ti-7Al alloy",

abstract = "The microstructures of Ni-43Ti-7Al (at-\%) alloys containing different oxygen contents have been investigated. It has been found that the volume fraction of Ti2Ni increases with increasing oxygen. In the sample with oxygen content of 6000 wt ppm, the formation of B2 phase is suppressed, and the Ti 2Ni phase solidifies as the primary phase. Thus, oxygen will have a strong effect on the microstructures of Ni-43Ti-7Al alloys. Furthermore, in Ni-43Ti-7Al-0.05Y and Ni-43Ti-7Al-0.15Y alloys, the volume fraction of Ti2Ni decreases, and a small amount of Y 2O 3 can be observed compared with the Y free alloys, which further verifies the effect of oxygen on the Ti2Ni phase. Finally, the possible mechanism for the role of oxygen on the Ti 2Ni phase is discussed.",

keywords = "Microstructure, NiTi-Al alloy, Nucleation, Oxygen, Ti Ni phase",

author = "L. Zhou and Zheng, \{L. J.\} and Zhang, \{H. R.\} and H. Zhang",

year = "2012",

doi = "10.1179/1433075X11Y.0000000043",

language = "英语",

volume = "16",

pages = "115--120",

journal = "Materials Research Innovations",

issn = "1432-8917",

publisher = "Maney Publishing",

number = "2",

}

TY - JOUR

T1 - Effect of oxygen on microstructure of Ni-43Ti-7Al alloy

AU - Zhou, L.

AU - Zheng, L. J.

AU - Zhang, H. R.

AU - Zhang, H.

PY - 2012

Y1 - 2012

N2 - The microstructures of Ni-43Ti-7Al (at-%) alloys containing different oxygen contents have been investigated. It has been found that the volume fraction of Ti2Ni increases with increasing oxygen. In the sample with oxygen content of 6000 wt ppm, the formation of B2 phase is suppressed, and the Ti 2Ni phase solidifies as the primary phase. Thus, oxygen will have a strong effect on the microstructures of Ni-43Ti-7Al alloys. Furthermore, in Ni-43Ti-7Al-0.05Y and Ni-43Ti-7Al-0.15Y alloys, the volume fraction of Ti2Ni decreases, and a small amount of Y 2O 3 can be observed compared with the Y free alloys, which further verifies the effect of oxygen on the Ti2Ni phase. Finally, the possible mechanism for the role of oxygen on the Ti 2Ni phase is discussed.

AB - The microstructures of Ni-43Ti-7Al (at-%) alloys containing different oxygen contents have been investigated. It has been found that the volume fraction of Ti2Ni increases with increasing oxygen. In the sample with oxygen content of 6000 wt ppm, the formation of B2 phase is suppressed, and the Ti 2Ni phase solidifies as the primary phase. Thus, oxygen will have a strong effect on the microstructures of Ni-43Ti-7Al alloys. Furthermore, in Ni-43Ti-7Al-0.05Y and Ni-43Ti-7Al-0.15Y alloys, the volume fraction of Ti2Ni decreases, and a small amount of Y 2O 3 can be observed compared with the Y free alloys, which further verifies the effect of oxygen on the Ti2Ni phase. Finally, the possible mechanism for the role of oxygen on the Ti 2Ni phase is discussed.

KW - Microstructure

KW - NiTi-Al alloy

KW - Nucleation

KW - Oxygen

KW - Ti Ni phase

UR - https://www.scopus.com/pages/publications/84863804402

U2 - 10.1179/1433075X11Y.0000000043

DO - 10.1179/1433075X11Y.0000000043

M3 - 文章

AN - SCOPUS:84863804402

SN - 1432-8917

VL - 16

SP - 115

EP - 120

JO - Materials Research Innovations

JF - Materials Research Innovations

IS - 2

ER -

Effect of oxygen on microstructure of Ni-43Ti-7Al alloy

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Keywords

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