A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates

Alexander J Knowles, Lucy Reynolds, Vassili A Vorontsov, David Dye

Research output: Contribution to journalArticle

Abstract

A nickel based superalloy has been designed where the fcc γ Ni matrix is reinforced by two different ordered-fcc intermetallic compounds, γ' L1Ni3Al and γ'' D022 Ni3V. Primary ageing at 900–1000 °C precipitated spherical L12 Ni3Al, whose volume fraction and size were controlled by altering the ageing temperature and time. Secondary ageing at 700 °C for 1–1000 h precipitated D022 Ni3V laths. The duplex precipitation increased hardness by up to 85 HV, with ∼ 500 MPa compressive proof strength maintained at 800 °C. Electron microscopy studied the Ni3Al precipitation and confirmed the form of the secondary Ni3V precipitates and their long term stability.
Original languageEnglish
Pages (from-to)472-476
Number of pages5
JournalScripta Materialia
Volume162
Early online date21 Dec 2018
DOIs
Publication statusPublished - 15 Mar 2019

Fingerprint

heat resistant alloys
Nickel
Superalloys
Precipitates
precipitates
Aging of materials
nickel
Electron microscopy
Intermetallics
intermetallics
Volume fraction
electron microscopy
hardness
Hardness
matrices
Temperature
temperature

Keywords

  • superalloy
  • precipitation
  • intermetallics
  • microstructure
  • mechanical properties

Cite this

Knowles, Alexander J ; Reynolds, Lucy ; Vorontsov, Vassili A ; Dye, David. / A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates. In: Scripta Materialia. 2019 ; Vol. 162. pp. 472-476.
@article{94332ca5ee974513be0c264791deba40,
title = "A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates",
abstract = "A nickel based superalloy has been designed where the fcc γ Ni matrix is reinforced by two different ordered-fcc intermetallic compounds, γ' L12 Ni3Al and γ'' D022 Ni3V. Primary ageing at 900–1000 °C precipitated spherical L12 Ni3Al, whose volume fraction and size were controlled by altering the ageing temperature and time. Secondary ageing at 700 °C for 1–1000 h precipitated D022 Ni3V laths. The duplex precipitation increased hardness by up to 85 HV, with ∼ 500 MPa compressive proof strength maintained at 800 °C. Electron microscopy studied the Ni3Al precipitation and confirmed the form of the secondary Ni3V precipitates and their long term stability.",
keywords = "superalloy, precipitation, intermetallics, microstructure, mechanical properties",
author = "Knowles, {Alexander J} and Lucy Reynolds and Vorontsov, {Vassili A} and David Dye",
year = "2019",
month = "3",
day = "15",
doi = "10.1016/j.scriptamat.2018.12.013",
language = "English",
volume = "162",
pages = "472--476",
journal = "Scripta Materialia",
issn = "1359-6462",

}

A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates. / Knowles, Alexander J; Reynolds, Lucy; Vorontsov, Vassili A; Dye, David.

In: Scripta Materialia, Vol. 162, 15.03.2019, p. 472-476.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates

AU - Knowles, Alexander J

AU - Reynolds, Lucy

AU - Vorontsov, Vassili A

AU - Dye, David

PY - 2019/3/15

Y1 - 2019/3/15

N2 - A nickel based superalloy has been designed where the fcc γ Ni matrix is reinforced by two different ordered-fcc intermetallic compounds, γ' L12 Ni3Al and γ'' D022 Ni3V. Primary ageing at 900–1000 °C precipitated spherical L12 Ni3Al, whose volume fraction and size were controlled by altering the ageing temperature and time. Secondary ageing at 700 °C for 1–1000 h precipitated D022 Ni3V laths. The duplex precipitation increased hardness by up to 85 HV, with ∼ 500 MPa compressive proof strength maintained at 800 °C. Electron microscopy studied the Ni3Al precipitation and confirmed the form of the secondary Ni3V precipitates and their long term stability.

AB - A nickel based superalloy has been designed where the fcc γ Ni matrix is reinforced by two different ordered-fcc intermetallic compounds, γ' L12 Ni3Al and γ'' D022 Ni3V. Primary ageing at 900–1000 °C precipitated spherical L12 Ni3Al, whose volume fraction and size were controlled by altering the ageing temperature and time. Secondary ageing at 700 °C for 1–1000 h precipitated D022 Ni3V laths. The duplex precipitation increased hardness by up to 85 HV, with ∼ 500 MPa compressive proof strength maintained at 800 °C. Electron microscopy studied the Ni3Al precipitation and confirmed the form of the secondary Ni3V precipitates and their long term stability.

KW - superalloy

KW - precipitation

KW - intermetallics

KW - microstructure

KW - mechanical properties

UR - https://www.sciencedirect.com/journal/scripta-materialia

U2 - 10.1016/j.scriptamat.2018.12.013

DO - 10.1016/j.scriptamat.2018.12.013

M3 - Article

VL - 162

SP - 472

EP - 476

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -