Interrupted ageing in steels: hardness improvement and microstructural stabilization
Interrupted ageing in steels: hardness improvement and microstructural stabilization
Similarly to aluminium alloys, interrupted ageing in steels may increase hardness by 10%. By adding an intermediate stage between quenching and tempering, where quenched martensite is left to age at room temperature, carbon forms finer precipitate microstructures, which become more stable at room temperature. Using thermoelectric power to model carbon segregation to dislocations, it appears that room temperature ageing increases the number of effective nucleation sites for the subsequent tempering stage, as reflected in the microstructure and hardness.
Ageing, Carbides, Hardness, Interstitial diffusion, Martensitic steels
945-948
Kim, B.
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Celada, C.
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San Martín, D.
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Chao, J.
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Vara, J.
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Rivera-Díaz-Del-Castillo, P.E.J.
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June 2013
Kim, B.
be3a7f1f-72af-47d1-ae83-a11475e6dcb9
Celada, C.
a8eaf87e-e2f5-4a79-b891-b30976c834f4
San Martín, D.
3cb4e081-1f6f-4f63-a25f-30613c3288a1
Chao, J.
4d3ea93b-9085-45e6-81e1-f0f77ad8b2cd
Vara, J.
e2b0c421-65fc-415c-a539-a87152fa5193
Rivera-Díaz-Del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Kim, B., Celada, C., San Martín, D., Chao, J., Vara, J. and Rivera-Díaz-Del-Castillo, P.E.J.
(2013)
Interrupted ageing in steels: hardness improvement and microstructural stabilization.
Scripta Materialia, 68 (12), .
(doi:10.1016/j.scriptamat.2013.02.036).
Abstract
Similarly to aluminium alloys, interrupted ageing in steels may increase hardness by 10%. By adding an intermediate stage between quenching and tempering, where quenched martensite is left to age at room temperature, carbon forms finer precipitate microstructures, which become more stable at room temperature. Using thermoelectric power to model carbon segregation to dislocations, it appears that room temperature ageing increases the number of effective nucleation sites for the subsequent tempering stage, as reflected in the microstructure and hardness.
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Accepted/In Press date: 16 February 2013
e-pub ahead of print date: 27 February 2013
Published date: June 2013
Keywords:
Ageing, Carbides, Hardness, Interstitial diffusion, Martensitic steels
Identifiers
Local EPrints ID: 491887
URI: http://eprints.soton.ac.uk/id/eprint/491887
ISSN: 1359-6462
PURE UUID: 5c0496cc-ea10-4d40-a857-3a82405e2457
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Date deposited: 05 Jul 2024 16:35
Last modified: 11 Jul 2024 02:14
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Contributors
Author:
B. Kim
Author:
C. Celada
Author:
D. San Martín
Author:
J. Chao
Author:
J. Vara
Author:
P.E.J. Rivera-Díaz-Del-Castillo
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