Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels
Alloy partitioning during heat treatment in a lightweight precipitation hardened steel was investigated using transmission electron microscopy and atom probe tomography. The mechanical properties are discussed as a function of the effect of solution treatment temperature and aging time, giving rise...
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MDPI AG
2022-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/5/1670 |
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| author | Daniel M. Field Krista R. Limmer Billy C. Hornbuckle Dean T. Pierce Ken E. Moore Katherine M. Sebeck |
| author_facet | Daniel M. Field Krista R. Limmer Billy C. Hornbuckle Dean T. Pierce Ken E. Moore Katherine M. Sebeck |
| author_sort | Daniel M. Field |
| collection | DOAJ |
| description | Alloy partitioning during heat treatment in a lightweight precipitation hardened steel was investigated using transmission electron microscopy and atom probe tomography. The mechanical properties are discussed as a function of the effect of solution treatment temperature and aging time, giving rise to variations in chemical modulation. A wrought lightweight steel alloy with a nominal composition of Fe-30Mn-9Al-1Si-1C-0.5Mo (wt. %) was solution-treated between 1173–1273 K and aged at 773 K. Lower solution treatment temperatures retained a finer grain size and accelerated age hardening response that also produced an improved work hardening behavior with a tensile strength of −1460 MPa at 0.4 true strain. Atom probe tomography indicated these conditions also had reduced modulation in the Si and Al content due to the reduced aging time preventing silicon from diffusing out of the κ-carbide into the austenite. This work provides the framework for heat-treating lightweight, age hardenable steels with high strength and improved energy absorption. |
| first_indexed | 2024-03-09T20:33:10Z |
| format | Article |
| id | doaj.art-8eca8f46ef8143ba93fcebdeed7a3793 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T20:33:10Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-8eca8f46ef8143ba93fcebdeed7a37932023-11-23T23:17:08ZengMDPI AGMaterials1996-19442022-02-01155167010.3390/ma15051670Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened SteelsDaniel M. Field0Krista R. Limmer1Billy C. Hornbuckle2Dean T. Pierce3Ken E. Moore4Katherine M. Sebeck5US Army Combat Capabilities Development Command Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD 21005, USAUS Army Combat Capabilities Development Command Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD 21005, USAUS Army Combat Capabilities Development Command Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD 21005, USAMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USAMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USAUS Army Combat Capabilities Development Command Ground Vehicle Systems Center, Warren, MI 48092, USAAlloy partitioning during heat treatment in a lightweight precipitation hardened steel was investigated using transmission electron microscopy and atom probe tomography. The mechanical properties are discussed as a function of the effect of solution treatment temperature and aging time, giving rise to variations in chemical modulation. A wrought lightweight steel alloy with a nominal composition of Fe-30Mn-9Al-1Si-1C-0.5Mo (wt. %) was solution-treated between 1173–1273 K and aged at 773 K. Lower solution treatment temperatures retained a finer grain size and accelerated age hardening response that also produced an improved work hardening behavior with a tensile strength of −1460 MPa at 0.4 true strain. Atom probe tomography indicated these conditions also had reduced modulation in the Si and Al content due to the reduced aging time preventing silicon from diffusing out of the κ-carbide into the austenite. This work provides the framework for heat-treating lightweight, age hardenable steels with high strength and improved energy absorption.https://www.mdpi.com/1996-1944/15/5/1670κ-carbideage-hardening steelalloy partitioninglow density steel |
| spellingShingle | Daniel M. Field Krista R. Limmer Billy C. Hornbuckle Dean T. Pierce Ken E. Moore Katherine M. Sebeck Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels Materials κ-carbide age-hardening steel alloy partitioning low density steel |
| title | Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels |
| title_full | Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels |
| title_fullStr | Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels |
| title_full_unstemmed | Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels |
| title_short | Alloy Partitioning Effect on Strength and Toughness of κ-Carbide Strengthened Steels |
| title_sort | alloy partitioning effect on strength and toughness of κ carbide strengthened steels |
| topic | κ-carbide age-hardening steel alloy partitioning low density steel |
| url | https://www.mdpi.com/1996-1944/15/5/1670 |
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