Effect of microstructure evolution on impact toughness in advanced ultra-high strength steel

Shuai He; Zhifeng Li; Xin Liu; Xuming Liu; Chaoyi Wang; Chi Zhang; Junsheng Wang

doi:10.1016/j.matlet.2024.137086

Effect of microstructure evolution on impact toughness in advanced ultra-high strength steel

Shuai He, Zhifeng Li^*, Xin Liu, Xuming Liu, Chaoyi Wang, Chi Zhang, Junsheng Wang

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

The microstructure evolution and strength-toughness matching relationship of advanced ultra-high strength steel were studied under the tempering temperature range of 200–400 °C. The Charpy impact absorption energy of U-notch and V-notch focused on the crack initiation and crack propagation processes, respectively. The peak impact absorption energy of the U-notch appeared at 300 °C due to reduced stress concentration from low GND (Geometrically Necessary Dislocations) density. The optimal mechanical properties were found after tempering at 250 °C, where martensitic blocks hindered crack propagation, resulting in the peak impact energy of V-notch.

Original language	English
Article number	137086
Journal	Materials Letters
Volume	372
DOIs	https://doi.org/10.1016/j.matlet.2024.137086
Publication status	Published - 1 Oct 2024
Externally published	Yes

Keywords

Charpy impact energy
GND
Grain boundaries
Mechanical properties
Microstructure

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10.1016/j.matlet.2024.137086

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title = "Effect of microstructure evolution on impact toughness in advanced ultra-high strength steel",

abstract = "The microstructure evolution and strength-toughness matching relationship of advanced ultra-high strength steel were studied under the tempering temperature range of 200–400 °C. The Charpy impact absorption energy of U-notch and V-notch focused on the crack initiation and crack propagation processes, respectively. The peak impact absorption energy of the U-notch appeared at 300 °C due to reduced stress concentration from low GND (Geometrically Necessary Dislocations) density. The optimal mechanical properties were found after tempering at 250 °C, where martensitic blocks hindered crack propagation, resulting in the peak impact energy of V-notch.",

keywords = "Charpy impact energy, GND, Grain boundaries, Mechanical properties, Microstructure",

author = "Shuai He and Zhifeng Li and Xin Liu and Xuming Liu and Chaoyi Wang and Chi Zhang and Junsheng Wang",

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doi = "10.1016/j.matlet.2024.137086",

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T1 - Effect of microstructure evolution on impact toughness in advanced ultra-high strength steel

AU - He, Shuai

AU - Li, Zhifeng

AU - Liu, Xin

AU - Liu, Xuming

AU - Wang, Chaoyi

AU - Zhang, Chi

AU - Wang, Junsheng

PY - 2024/10/1

Y1 - 2024/10/1

N2 - The microstructure evolution and strength-toughness matching relationship of advanced ultra-high strength steel were studied under the tempering temperature range of 200–400 °C. The Charpy impact absorption energy of U-notch and V-notch focused on the crack initiation and crack propagation processes, respectively. The peak impact absorption energy of the U-notch appeared at 300 °C due to reduced stress concentration from low GND (Geometrically Necessary Dislocations) density. The optimal mechanical properties were found after tempering at 250 °C, where martensitic blocks hindered crack propagation, resulting in the peak impact energy of V-notch.

AB - The microstructure evolution and strength-toughness matching relationship of advanced ultra-high strength steel were studied under the tempering temperature range of 200–400 °C. The Charpy impact absorption energy of U-notch and V-notch focused on the crack initiation and crack propagation processes, respectively. The peak impact absorption energy of the U-notch appeared at 300 °C due to reduced stress concentration from low GND (Geometrically Necessary Dislocations) density. The optimal mechanical properties were found after tempering at 250 °C, where martensitic blocks hindered crack propagation, resulting in the peak impact energy of V-notch.

KW - Charpy impact energy

KW - GND

KW - Grain boundaries

KW - Mechanical properties

KW - Microstructure

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DO - 10.1016/j.matlet.2024.137086

M3 - Article

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SN - 0167-577X

VL - 372

JO - Materials Letters

JF - Materials Letters

M1 - 137086

ER -

Effect of microstructure evolution on impact toughness in advanced ultra-high strength steel

Abstract

Keywords

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