The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy

Xiaojian Li; Haifeng Chen; Jiangbo Sha; Hu Zhang

doi:10.1016/j.msea.2010.04.046

The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy

Xiaojian Li
, Haifeng Chen
, Jiangbo Sha
, Hu Zhang^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

48 Scopus citations

Abstract

This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)_ss, silicide (Nb,Ti)₅Si₃ and Laves phase NbCr₂. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1% carbon addition shows the best room temperature toughness of 9.05MPam^1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.

Original language	English
Pages (from-to)	6140-6152
Number of pages	13
Journal	Materials Science and Engineering: A
Volume	527
Issue number	23
DOIs	https://doi.org/10.1016/j.msea.2010.04.046
State	Published - 2010

Keywords

Induction melting
Induction skull melting
Mechanical property
Microstructure
Nb-Si based alloys
Oxidation resistance

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10.1016/j.msea.2010.04.046

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title = "The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy",

abstract = "This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)ss, silicide (Nb,Ti)5Si3 and Laves phase NbCr2. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1\% carbon addition shows the best room temperature toughness of 9.05MPam1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.",

keywords = "Induction melting, Induction skull melting, Mechanical property, Microstructure, Nb-Si based alloys, Oxidation resistance",

author = "Xiaojian Li and Haifeng Chen and Jiangbo Sha and Hu Zhang",

year = "2010",

doi = "10.1016/j.msea.2010.04.046",

language = "英语",

volume = "527",

pages = "6140--6152",

journal = "Materials Science and Engineering: A",

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T1 - The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy

AU - Li, Xiaojian

AU - Chen, Haifeng

AU - Sha, Jiangbo

AU - Zhang, Hu

PY - 2010

Y1 - 2010

N2 - This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)ss, silicide (Nb,Ti)5Si3 and Laves phase NbCr2. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1% carbon addition shows the best room temperature toughness of 9.05MPam1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.

AB - This paper deals with the effects of vacuum non-consumable arc-melting (VCAM), vacuum induction melting (VIM) and induction skull melting (ISM) technologies on microstructures, mechanical properties and oxidation resistance of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy. It is revealed that the microstructure of the Nb-16Si-22Ti-2Al-2Hf-17Cr alloy is composed of Nb solid solution (Nb,Ti)ss, silicide (Nb,Ti)5Si3 and Laves phase NbCr2. The ISM ingots exhibit the finest microstructure, while the VCAM ingot shows the coarsest microstructure. Refined at 1800°C for 10min, the VIM ingot with a 0.1% carbon addition shows the best room temperature toughness of 9.05MPam1/2 on average, however, the highest strength at 1250°C was obtained on the ISM sample refined at technology parameters of 140kw melting for 2min+160kw melting for 3min. In addition, oxidation resistance was greatly improved through the ISM technology compared with the VCAM technology.

KW - Induction melting

KW - Induction skull melting

KW - Mechanical property

KW - Microstructure

KW - Nb-Si based alloys

KW - Oxidation resistance

UR - https://www.scopus.com/pages/publications/77955470491

U2 - 10.1016/j.msea.2010.04.046

DO - 10.1016/j.msea.2010.04.046

M3 - 文章

AN - SCOPUS:77955470491

SN - 0921-5093

VL - 527

SP - 6140

EP - 6152

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 23

ER -

The effects of melting technologies on the microstructures and properties of Nb-16Si-22Ti-2Al-2Hf-17Cr alloy

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