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

Alexander Knowles; Lucy Reynolds; Vassili Vorontsov; David Dye

doi:10.1016/j.scriptamat.2018.12.013

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

Alexander Knowles, Lucy Reynolds, Vassili Vorontsov, David Dye

Metallurgy and Materials

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

7 Citations (Scopus)

107 Downloads (Pure)

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 γ00 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 1−1000h precipitated D0₂₂Ni₃V 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 language	English
Pages (from-to)	472-476
Number of pages	5
Journal	Scripta Materialia
Volume	162
Early online date	21 Dec 2018
DOIs	https://doi.org/10.1016/j.scriptamat.2018.12.013
Publication status	Published - 15 Mar 2019

Keywords

Superalloy
Precipitation
Intermetallics
microstructure
mechanical properties

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Alexander_Knowles_et_al_A_nickel_based_superalloy_reinforced_by_both_Ni3Al_and_Ni3V_Scripta_Materialia_2018
Checked for eligibility: 21/12/2018
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Cite this

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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 γ00 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 1−1000h 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 = "Alexander Knowles and Lucy Reynolds and Vassili Vorontsov and David Dye",

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doi = "10.1016/j.scriptamat.2018.12.013",

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

AU - Knowles, Alexander

AU - Reynolds, Lucy

AU - Vorontsov, Vassili

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 γ00 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 1−1000h 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 γ00 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 1−1000h 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

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DO - 10.1016/j.scriptamat.2018.12.013

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