Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys: Role and effect of carbides precipitates

Y. X. Xu; J. T. Lu; W. Y. Li; X. W. Yang

doi:10.1016/j.corsci.2018.05.040

Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys: Role and effect of carbides precipitates

Y. X. Xu, J. T. Lu, W. Y. Li, X. W. Yang

School of Materials Sience and Engineering

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

38 Scopus citations

Abstract

Present work aims to find the influence of carbide precipitates on the oxidation behaviour of Nb-rich Ni-Cr-Fe alloys at 1000 °C in air. Three Ni-Cr-Fe alloys, NC-15Fe-1Nb, NC-15Fe-1Nb-0.8C, NC-15Fe-1Nb-0.8C-0.5Ti were designed by alloying with Ti, Nb and C. Results show that the formation of NbC is crucial for the preferential oxidation of Cr. Moreover, either preventing NbC formation or favouring (Ti,Nb)C formation is found detrimental on such a beneficial effect, where the latter has a more intense influence. Roles of the precipitates in oxidation mechanism give new insights into the alloy optimization.

Original language	English
Pages (from-to)	252-259
Number of pages	8
Journal	Corrosion Science
Volume	140
DOIs	https://doi.org/10.1016/j.corsci.2018.05.040
State	Published - 1 Aug 2018

Keywords

A. Superalloys
B. EPMA
B. SEM
B. XRD
C. High-temperature corrosion
C. Oxidation

Access to Document

10.1016/j.corsci.2018.05.040

Cite this

@article{162aa549b2df4fd89483548e032b3efa,

title = "Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys: Role and effect of carbides precipitates",

abstract = "Present work aims to find the influence of carbide precipitates on the oxidation behaviour of Nb-rich Ni-Cr-Fe alloys at 1000 °C in air. Three Ni-Cr-Fe alloys, NC-15Fe-1Nb, NC-15Fe-1Nb-0.8C, NC-15Fe-1Nb-0.8C-0.5Ti were designed by alloying with Ti, Nb and C. Results show that the formation of NbC is crucial for the preferential oxidation of Cr. Moreover, either preventing NbC formation or favouring (Ti,Nb)C formation is found detrimental on such a beneficial effect, where the latter has a more intense influence. Roles of the precipitates in oxidation mechanism give new insights into the alloy optimization.",

keywords = "A. Superalloys, B. EPMA, B. SEM, B. XRD, C. High-temperature corrosion, C. Oxidation",

author = "Xu, {Y. X.} and Lu, {J. T.} and Li, {W. Y.} and Yang, {X. W.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = aug,

day = "1",

doi = "10.1016/j.corsci.2018.05.040",

language = "英语",

volume = "140",

pages = "252--259",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys

T2 - Role and effect of carbides precipitates

AU - Xu, Y. X.

AU - Lu, J. T.

AU - Li, W. Y.

AU - Yang, X. W.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Present work aims to find the influence of carbide precipitates on the oxidation behaviour of Nb-rich Ni-Cr-Fe alloys at 1000 °C in air. Three Ni-Cr-Fe alloys, NC-15Fe-1Nb, NC-15Fe-1Nb-0.8C, NC-15Fe-1Nb-0.8C-0.5Ti were designed by alloying with Ti, Nb and C. Results show that the formation of NbC is crucial for the preferential oxidation of Cr. Moreover, either preventing NbC formation or favouring (Ti,Nb)C formation is found detrimental on such a beneficial effect, where the latter has a more intense influence. Roles of the precipitates in oxidation mechanism give new insights into the alloy optimization.

AB - Present work aims to find the influence of carbide precipitates on the oxidation behaviour of Nb-rich Ni-Cr-Fe alloys at 1000 °C in air. Three Ni-Cr-Fe alloys, NC-15Fe-1Nb, NC-15Fe-1Nb-0.8C, NC-15Fe-1Nb-0.8C-0.5Ti were designed by alloying with Ti, Nb and C. Results show that the formation of NbC is crucial for the preferential oxidation of Cr. Moreover, either preventing NbC formation or favouring (Ti,Nb)C formation is found detrimental on such a beneficial effect, where the latter has a more intense influence. Roles of the precipitates in oxidation mechanism give new insights into the alloy optimization.

KW - A. Superalloys

KW - B. EPMA

KW - B. SEM

KW - B. XRD

KW - C. High-temperature corrosion

KW - C. Oxidation

UR - http://www.scopus.com/inward/record.url?scp=85047876197&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2018.05.040

DO - 10.1016/j.corsci.2018.05.040

M3 - 文章

AN - SCOPUS:85047876197

SN - 0010-938X

VL - 140

SP - 252

EP - 259

JO - Corrosion Science

JF - Corrosion Science

ER -

Oxidation behaviour of Nb-rich Ni-Cr-Fe alloys: Role and effect of carbides precipitates

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this