Unprecedented strength in pure iron via high-pressure induced nanotwinned martensite

Hongwang Zhang; Yuhui Wang; Yan Peng; Pinwen Zhu; Jianhua Liu; Zongqiang Feng; Guilin Wu; Xiaoxu Huang

doi:10.1080/21663831.2019.1612792

Unprecedented strength in pure iron via high-pressure induced nanotwinned martensite

Hongwang Zhang
, Yuhui Wang
, Yan Peng
, Pinwen Zhu
, Jianhua Liu
, Zongqiang Feng
, Guilin Wu
, Xiaoxu Huang^*

^*Corresponding author for this work

Yanshan University
Jilin University
Chongqing University

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

Martensitic transformation can easily induce a maximum hardness value of 800–900 HV (Vickers hardness) for steels with carbon contents of 0.6 wt.% and above. However, the occurrence of martensitic transformation in pure iron requires exceptionally high cooling rates (10⁵ –10⁶ °C/s), and the maximum achievable hardness is only about 150 HV. Here we report an extreme hardness of 830 HV in pure iron obtained through high pressure induced martensitic transformation at a rather slow cooling rate of just 10°C/s. This unprecedented strength originates from the formation of twin-related martensitic laths with an average thickness of 3.8 nm.

Original language	English
Journal	Materials Research Letters
Volume	7
Issue number	9
Pages (from-to)	354-360
ISSN	2166-3831
DOIs	https://doi.org/10.1080/21663831.2019.1612792
Publication status	Published - 2019

Bibliographical note

© 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords

high pressure
Martensitic transformation
nanotwinned martensite
pure iron
strength

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title = "Unprecedented strength in pure iron via high-pressure induced nanotwinned martensite",

abstract = " Martensitic transformation can easily induce a maximum hardness value of 800–900 HV (Vickers hardness) for steels with carbon contents of 0.6 wt.\% and above. However, the occurrence of martensitic transformation in pure iron requires exceptionally high cooling rates (105 –106 °C/s), and the maximum achievable hardness is only about 150 HV. Here we report an extreme hardness of 830 HV in pure iron obtained through high pressure induced martensitic transformation at a rather slow cooling rate of just 10°C/s. This unprecedented strength originates from the formation of twin-related martensitic laths with an average thickness of 3.8 nm. ",

keywords = "high pressure, Martensitic transformation, nanotwinned martensite, pure iron, strength",

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note = "{\textcopyright} 2019 The Author(s). Published by Informa UK Limited, trading as Taylor \& Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.",

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T1 - Unprecedented strength in pure iron via high-pressure induced nanotwinned martensite

AU - Zhang, Hongwang

AU - Wang, Yuhui

AU - Peng, Yan

AU - Zhu, Pinwen

AU - Liu, Jianhua

AU - Feng, Zongqiang

AU - Wu, Guilin

AU - Huang, Xiaoxu

N1 - © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

PY - 2019

Y1 - 2019

N2 - Martensitic transformation can easily induce a maximum hardness value of 800–900 HV (Vickers hardness) for steels with carbon contents of 0.6 wt.% and above. However, the occurrence of martensitic transformation in pure iron requires exceptionally high cooling rates (105 –106 °C/s), and the maximum achievable hardness is only about 150 HV. Here we report an extreme hardness of 830 HV in pure iron obtained through high pressure induced martensitic transformation at a rather slow cooling rate of just 10°C/s. This unprecedented strength originates from the formation of twin-related martensitic laths with an average thickness of 3.8 nm.

AB - Martensitic transformation can easily induce a maximum hardness value of 800–900 HV (Vickers hardness) for steels with carbon contents of 0.6 wt.% and above. However, the occurrence of martensitic transformation in pure iron requires exceptionally high cooling rates (105 –106 °C/s), and the maximum achievable hardness is only about 150 HV. Here we report an extreme hardness of 830 HV in pure iron obtained through high pressure induced martensitic transformation at a rather slow cooling rate of just 10°C/s. This unprecedented strength originates from the formation of twin-related martensitic laths with an average thickness of 3.8 nm.

KW - high pressure

KW - Martensitic transformation

KW - nanotwinned martensite

KW - pure iron

KW - strength

U2 - 10.1080/21663831.2019.1612792

DO - 10.1080/21663831.2019.1612792

M3 - Journal article

AN - SCOPUS:85065420653

SN - 2166-3831

VL - 7

SP - 354

EP - 360

JO - Materials Research Letters

JF - Materials Research Letters

IS - 9

ER -

Unprecedented strength in pure iron via high-pressure induced nanotwinned martensite

Abstract

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Keywords

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