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Effect of Heat Treatment Processes on Microstructure and Mechanical Properties of the Ultra-low Carbon 11.3Cr–1.7Mn–0.8Ni Steel.

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Title: Effect of Heat Treatment Processes on Microstructure and Mechanical Properties of the Ultra-low Carbon 11.3Cr–1.7Mn–0.8Ni Steel.
Authors: Wei, Hairui1,2 (AUTHOR), Luo, Gang2 (AUTHOR), Liu, Baosheng1 (AUTHOR), Duan, Xiufeng2 (AUTHOR), Hou, Lifeng3 (AUTHOR), Wei, Yinghui1,3 (AUTHOR) yhwei_tyut@126.com
Source: Metallurgical & Materials Transactions. Part A. Mar2026, Vol. 57 Issue 3, p1281-1298. 18p.
Subjects: Heat treatment, Microstructure, Fractography, Grain size, Martensite, Steel, Mechanical behavior of materials
Abstract: This study systematically investigates the effects of heat treatment processes on the microstructure transformation, mechanical properties, and microstructural feature parameters of ultra-low carbon 11.3Cr–1.7Mn–0.8Ni steel. The results demonstrate that elevating heat treatment temperature from 730 °C to 1000 °C enhanced austenitization degree, reducing ferrite fraction while increasing martensite content and inducing gradual grain coarsening in this Cr–Ni ultra-low carbon stainless steel. Correspondingly, microhardness and strength increase with rising martensite content, elongation decreases accordingly, while impact toughness evolution undergoes initial increase, stabilization and final decrease, governed by the synergistic effects of martensite content, grain size, and microstructural morphology. The morphology of tensile fracture surfaces reveals that the hot-rolled sample undergoes a mixed-mode fracture, whereas the heat-treated samples progressively transition from ductile to brittle fracture with increasing temperature. The morphology of impact fracture surfaces further demonstrates that the hot-rolled and low-temperature heat-treated samples predominantly undergo ductile fracture, while at high temperatures, brittle fracture mechanisms dominate. Microstructural parameters indicate the highest dislocation density and a nearly equal proportion of high-angle and low-angle grain boundaries in the hot-rolled samples. In contrast, heat-treated samples exhibit a lower overall dislocation density. However, this density initially increases and subsequently decreases as the temperature rises. [ABSTRACT FROM AUTHOR]
Copyright of Metallurgical & Materials Transactions. Part A is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 191605094
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  Data: Effect of Heat Treatment Processes on Microstructure and Mechanical Properties of the Ultra-low Carbon 11.3Cr–1.7Mn–0.8Ni Steel.
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  Data: <searchLink fieldCode="AR" term="%22Wei%2C+Hairui%22">Wei, Hairui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Gang%22">Luo, Gang</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Baosheng%22">Liu, Baosheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Duan%2C+Xiufeng%22">Duan, Xiufeng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hou%2C+Lifeng%22">Hou, Lifeng</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Yinghui%22">Wei, Yinghui</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> yhwei_tyut@126.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Metallurgical+%26+Materials+Transactions%2E+Part+A%22">Metallurgical & Materials Transactions. Part A</searchLink>. Mar2026, Vol. 57 Issue 3, p1281-1298. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+treatment%22">Heat treatment</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Fractography%22">Fractography</searchLink><br /><searchLink fieldCode="DE" term="%22Grain+size%22">Grain size</searchLink><br /><searchLink fieldCode="DE" term="%22Martensite%22">Martensite</searchLink><br /><searchLink fieldCode="DE" term="%22Steel%22">Steel</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink>
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  Data: This study systematically investigates the effects of heat treatment processes on the microstructure transformation, mechanical properties, and microstructural feature parameters of ultra-low carbon 11.3Cr–1.7Mn–0.8Ni steel. The results demonstrate that elevating heat treatment temperature from 730 °C to 1000 °C enhanced austenitization degree, reducing ferrite fraction while increasing martensite content and inducing gradual grain coarsening in this Cr–Ni ultra-low carbon stainless steel. Correspondingly, microhardness and strength increase with rising martensite content, elongation decreases accordingly, while impact toughness evolution undergoes initial increase, stabilization and final decrease, governed by the synergistic effects of martensite content, grain size, and microstructural morphology. The morphology of tensile fracture surfaces reveals that the hot-rolled sample undergoes a mixed-mode fracture, whereas the heat-treated samples progressively transition from ductile to brittle fracture with increasing temperature. The morphology of impact fracture surfaces further demonstrates that the hot-rolled and low-temperature heat-treated samples predominantly undergo ductile fracture, while at high temperatures, brittle fracture mechanisms dominate. Microstructural parameters indicate the highest dislocation density and a nearly equal proportion of high-angle and low-angle grain boundaries in the hot-rolled samples. In contrast, heat-treated samples exhibit a lower overall dislocation density. However, this density initially increases and subsequently decreases as the temperature rises. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Metallurgical & Materials Transactions. Part A is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – TitleFull: Effect of Heat Treatment Processes on Microstructure and Mechanical Properties of the Ultra-low Carbon 11.3Cr–1.7Mn–0.8Ni Steel.
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              Text: Mar2026
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