The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys

Stoichko Antonov*, Wei Chen, Song Lu, Dieter Isheim, David N Seidman, Qiang Feng, Eugene Sun, Sammy Tin

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The effect of phosphorous on the microstructure of a powder-processed, high Nb-content, Ni-based superalloy was studied and compared to a P-free variant. The P-doped sample had a lower incipient melting temperature, forming a (Ni, Co, Cr, P)2(Nb, Mo) laves phase along the grain boundaries. Transmission electron microscopy and atom probe tomography were used to identify the crystal structure, assess phase compositions, and determine any elemental segregation to phase boundaries. The results revealed strong partitioning of P to the laves phase and a slight Mo gradient towards the γ′ phrase. Finally, a simplified laves phase was successfully modeled via density functional theory calculations.

Original languageEnglish (US)
Pages (from-to)44-48
Number of pages5
JournalScripta Materialia
Volume161
DOIs
StatePublished - Mar 1 2019

Fingerprint

Laves phases
heat resistant alloys
Phase boundaries
refractories
Superalloys
Phase composition
Refractory materials
Powders
Phosphorus
Density functional theory
Tomography
Melting point
phosphorus
Grain boundaries
grain boundaries
Crystal structure
Transmission electron microscopy
Atoms
Microstructure
tomography

Keywords

  • Atom probe tomography
  • Density functional theory
  • Laves
  • Phosphorous
  • Superalloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Antonov, Stoichko ; Chen, Wei ; Lu, Song ; Isheim, Dieter ; Seidman, David N ; Feng, Qiang ; Sun, Eugene ; Tin, Sammy. / The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys. In: Scripta Materialia. 2019 ; Vol. 161. pp. 44-48.
@article{e67f6d927b1e483faf59fdc9ae63f228,
title = "The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys",
abstract = "The effect of phosphorous on the microstructure of a powder-processed, high Nb-content, Ni-based superalloy was studied and compared to a P-free variant. The P-doped sample had a lower incipient melting temperature, forming a (Ni, Co, Cr, P)2(Nb, Mo) laves phase along the grain boundaries. Transmission electron microscopy and atom probe tomography were used to identify the crystal structure, assess phase compositions, and determine any elemental segregation to phase boundaries. The results revealed strong partitioning of P to the laves phase and a slight Mo gradient towards the γ′ phrase. Finally, a simplified laves phase was successfully modeled via density functional theory calculations.",
keywords = "Atom probe tomography, Density functional theory, Laves, Phosphorous, Superalloy",
author = "Stoichko Antonov and Wei Chen and Song Lu and Dieter Isheim and Seidman, {David N} and Qiang Feng and Eugene Sun and Sammy Tin",
year = "2019",
month = "3",
day = "1",
doi = "10.1016/j.scriptamat.2018.10.015",
language = "English (US)",
volume = "161",
pages = "44--48",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",

}

The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys. / Antonov, Stoichko; Chen, Wei; Lu, Song; Isheim, Dieter; Seidman, David N; Feng, Qiang; Sun, Eugene; Tin, Sammy.

In: Scripta Materialia, Vol. 161, 01.03.2019, p. 44-48.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effect of phosphorus on the formation of grain boundary laves phase in high-refractory content Ni-based superalloys

AU - Antonov, Stoichko

AU - Chen, Wei

AU - Lu, Song

AU - Isheim, Dieter

AU - Seidman, David N

AU - Feng, Qiang

AU - Sun, Eugene

AU - Tin, Sammy

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The effect of phosphorous on the microstructure of a powder-processed, high Nb-content, Ni-based superalloy was studied and compared to a P-free variant. The P-doped sample had a lower incipient melting temperature, forming a (Ni, Co, Cr, P)2(Nb, Mo) laves phase along the grain boundaries. Transmission electron microscopy and atom probe tomography were used to identify the crystal structure, assess phase compositions, and determine any elemental segregation to phase boundaries. The results revealed strong partitioning of P to the laves phase and a slight Mo gradient towards the γ′ phrase. Finally, a simplified laves phase was successfully modeled via density functional theory calculations.

AB - The effect of phosphorous on the microstructure of a powder-processed, high Nb-content, Ni-based superalloy was studied and compared to a P-free variant. The P-doped sample had a lower incipient melting temperature, forming a (Ni, Co, Cr, P)2(Nb, Mo) laves phase along the grain boundaries. Transmission electron microscopy and atom probe tomography were used to identify the crystal structure, assess phase compositions, and determine any elemental segregation to phase boundaries. The results revealed strong partitioning of P to the laves phase and a slight Mo gradient towards the γ′ phrase. Finally, a simplified laves phase was successfully modeled via density functional theory calculations.

KW - Atom probe tomography

KW - Density functional theory

KW - Laves

KW - Phosphorous

KW - Superalloy

UR - http://www.scopus.com/inward/record.url?scp=85054925860&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054925860&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2018.10.015

DO - 10.1016/j.scriptamat.2018.10.015

M3 - Article

VL - 161

SP - 44

EP - 48

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -