Optimising mechanical properties of hot forged nickel superalloy 625 components

Nthambe Singo; John Coles; Malgorzata Rosochowska; Himanshu Lalvani; Jose Hernandez; William Ion

doi:10.1063/1.5034967

Optimising mechanical properties of hot forged nickel superalloy 625 components

Nthambe Singo, John Coles, Malgorzata Rosochowska, Himanshu Lalvani, Jose Hernandez, William Ion

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

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Abstract

Hot forging and subsequent heat treatment were resulting in substandard mechanical properties of nickel superalloy, Alloy 625, components. The low strength was found to be due to inadequate deformation during forging, excessive grain growth and precipitation of carbides during subsequent heat treatment. Experimentation in a drop forging company and heat treatment facility led to the establishment of optimal parameters to minimise grain size and mitigate the adverse effects of carbide precipitation, leading to successful fulfilment of mechanical property specifications. This was achieved by reducing the number of operations, maximising the extent of deformation by changing the slug dimensions and its orientation in the die, and minimising the time of exposure to elevated temperatures in both the forging and subsequent heat treatment processes to avoid grain growth.

Original language	English
Article number	110010
Number of pages	6
Journal	AIP Conference Proceedings
Volume	1960
Issue number	1
DOIs	https://doi.org/10.1063/1.5034967
Publication status	Published - 2 May 2018
Event	21st International ESAFORM Conference on Material Forming - Palermo, Italy Duration: 23 Apr 2018 → …

Keywords

mechanical properties
hot forging
nickel superalloys
alloy 625
forming

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Singo-etal-ESAFORM2018-Optimising-mechanical-properties-of-hot-forged-nickel-superalloyAccepted author manuscript, 773 KB

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title = "Optimising mechanical properties of hot forged nickel superalloy 625 components",

abstract = "Hot forging and subsequent heat treatment were resulting in substandard mechanical properties of nickel superalloy, Alloy 625, components. The low strength was found to be due to inadequate deformation during forging, excessive grain growth and precipitation of carbides during subsequent heat treatment. Experimentation in a drop forging company and heat treatment facility led to the establishment of optimal parameters to minimise grain size and mitigate the adverse effects of carbide precipitation, leading to successful fulfilment of mechanical property specifications. This was achieved by reducing the number of operations, maximising the extent of deformation by changing the slug dimensions and its orientation in the die, and minimising the time of exposure to elevated temperatures in both the forging and subsequent heat treatment processes to avoid grain growth.",

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T1 - Optimising mechanical properties of hot forged nickel superalloy 625 components

AU - Singo, Nthambe

AU - Coles, John

AU - Rosochowska, Malgorzata

AU - Lalvani, Himanshu

AU - Hernandez, Jose

AU - Ion, William

PY - 2018/5/2

Y1 - 2018/5/2

N2 - Hot forging and subsequent heat treatment were resulting in substandard mechanical properties of nickel superalloy, Alloy 625, components. The low strength was found to be due to inadequate deformation during forging, excessive grain growth and precipitation of carbides during subsequent heat treatment. Experimentation in a drop forging company and heat treatment facility led to the establishment of optimal parameters to minimise grain size and mitigate the adverse effects of carbide precipitation, leading to successful fulfilment of mechanical property specifications. This was achieved by reducing the number of operations, maximising the extent of deformation by changing the slug dimensions and its orientation in the die, and minimising the time of exposure to elevated temperatures in both the forging and subsequent heat treatment processes to avoid grain growth.

AB - Hot forging and subsequent heat treatment were resulting in substandard mechanical properties of nickel superalloy, Alloy 625, components. The low strength was found to be due to inadequate deformation during forging, excessive grain growth and precipitation of carbides during subsequent heat treatment. Experimentation in a drop forging company and heat treatment facility led to the establishment of optimal parameters to minimise grain size and mitigate the adverse effects of carbide precipitation, leading to successful fulfilment of mechanical property specifications. This was achieved by reducing the number of operations, maximising the extent of deformation by changing the slug dimensions and its orientation in the die, and minimising the time of exposure to elevated temperatures in both the forging and subsequent heat treatment processes to avoid grain growth.

KW - mechanical properties

KW - hot forging

KW - nickel superalloys

KW - alloy 625

KW - forming

U2 - 10.1063/1.5034967

DO - 10.1063/1.5034967

M3 - Conference Contribution

SN - 0094-243X

VL - 1960

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

IS - 1

M1 - 110010

T2 - 21st International ESAFORM Conference on Material Forming

Y2 - 23 April 2018

ER -

Optimising mechanical properties of hot forged nickel superalloy 625 components

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