Heterolamellar structure design simultaneously enhances strength and plasticity in ultrahigh strength steel

Hao Wu; Xiangtao Deng; Xiaolin Li; Tianliang Fu; Zhaodong Wang

doi:10.1016/j.msea.2024.146719

Heterolamellar structure design simultaneously enhances strength and plasticity in ultrahigh strength steel

Hao Wu, Xiangtao Deng, Xiaolin Li, Tianliang Fu, Zhaodong Wang

School of Materials Sience and Engineering

Northeastern University China

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

1 Scopus citations

Abstract

A dual phase lamellar heterostructured steel was designed and prepared by introducing soft phase lamellar δ-ferrite within hard phase lath martensite matrix. Comparing to the steel with fully martensitic, the dual phase lamellar heterostructured steel exhibits substantial enhancements in both strength and plasticity. The enhance of strength is attributed to the back stress strengthening and solid strengthening of Al. Additionally, the improvement of plasticity is largely due to the high strain hardening rate and presence of lamellar δ-ferrite which buffers microcrack propagation. This research offers a strategy to overcome the strength-plasticity trade-off in ultrahigh strength steels and shows potential for widespread industrial application.

Original language	English
Article number	146719
Journal	Materials Science and Engineering: A
Volume	906
DOIs	https://doi.org/10.1016/j.msea.2024.146719
State	Published - Jul 2024

Keywords

Back stress
Fracture mechanism
Lamellar heterostructure
Plasticity
Tensile strength

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10.1016/j.msea.2024.146719

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title = "Heterolamellar structure design simultaneously enhances strength and plasticity in ultrahigh strength steel",

abstract = "A dual phase lamellar heterostructured steel was designed and prepared by introducing soft phase lamellar δ-ferrite within hard phase lath martensite matrix. Comparing to the steel with fully martensitic, the dual phase lamellar heterostructured steel exhibits substantial enhancements in both strength and plasticity. The enhance of strength is attributed to the back stress strengthening and solid strengthening of Al. Additionally, the improvement of plasticity is largely due to the high strain hardening rate and presence of lamellar δ-ferrite which buffers microcrack propagation. This research offers a strategy to overcome the strength-plasticity trade-off in ultrahigh strength steels and shows potential for widespread industrial application.",

keywords = "Back stress, Fracture mechanism, Lamellar heterostructure, Plasticity, Tensile strength",

author = "Hao Wu and Xiangtao Deng and Xiaolin Li and Tianliang Fu and Zhaodong Wang",

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year = "2024",

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doi = "10.1016/j.msea.2024.146719",

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T1 - Heterolamellar structure design simultaneously enhances strength and plasticity in ultrahigh strength steel

AU - Wu, Hao

AU - Deng, Xiangtao

AU - Li, Xiaolin

AU - Fu, Tianliang

AU - Wang, Zhaodong

PY - 2024/7

Y1 - 2024/7

N2 - A dual phase lamellar heterostructured steel was designed and prepared by introducing soft phase lamellar δ-ferrite within hard phase lath martensite matrix. Comparing to the steel with fully martensitic, the dual phase lamellar heterostructured steel exhibits substantial enhancements in both strength and plasticity. The enhance of strength is attributed to the back stress strengthening and solid strengthening of Al. Additionally, the improvement of plasticity is largely due to the high strain hardening rate and presence of lamellar δ-ferrite which buffers microcrack propagation. This research offers a strategy to overcome the strength-plasticity trade-off in ultrahigh strength steels and shows potential for widespread industrial application.

AB - A dual phase lamellar heterostructured steel was designed and prepared by introducing soft phase lamellar δ-ferrite within hard phase lath martensite matrix. Comparing to the steel with fully martensitic, the dual phase lamellar heterostructured steel exhibits substantial enhancements in both strength and plasticity. The enhance of strength is attributed to the back stress strengthening and solid strengthening of Al. Additionally, the improvement of plasticity is largely due to the high strain hardening rate and presence of lamellar δ-ferrite which buffers microcrack propagation. This research offers a strategy to overcome the strength-plasticity trade-off in ultrahigh strength steels and shows potential for widespread industrial application.

KW - Back stress

KW - Fracture mechanism

KW - Lamellar heterostructure

KW - Plasticity

KW - Tensile strength

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DO - 10.1016/j.msea.2024.146719

M3 - 文章

AN - SCOPUS:85194339084

SN - 0921-5093

VL - 906

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 146719

ER -

Heterolamellar structure design simultaneously enhances strength and plasticity in ultrahigh strength steel

Abstract

Keywords

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