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Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment

PH13-8Mo stainless steel has been widely used in aerospace, petroleum and marine construction, obtaining continuous investigation attention in recent years. Based on the response of a hierarchical martensite matrix and possible reversed austenite, a systematic investigation of the evolution of the t...

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Autores principales: Zhang, Honglin, Mi, Peng, Hao, Luhan, Zhou, Haichong, Yan, Wei, Zhao, Kuan, Xu, Bin, Sun, Mingyue
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10221253/
https://www.ncbi.nlm.nih.gov/pubmed/37241257
http://dx.doi.org/10.3390/ma16103630
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author Zhang, Honglin
Mi, Peng
Hao, Luhan
Zhou, Haichong
Yan, Wei
Zhao, Kuan
Xu, Bin
Sun, Mingyue
author_facet Zhang, Honglin
Mi, Peng
Hao, Luhan
Zhou, Haichong
Yan, Wei
Zhao, Kuan
Xu, Bin
Sun, Mingyue
author_sort Zhang, Honglin
collection PubMed
description PH13-8Mo stainless steel has been widely used in aerospace, petroleum and marine construction, obtaining continuous investigation attention in recent years. Based on the response of a hierarchical martensite matrix and possible reversed austenite, a systematic investigation of the evolution of the toughening mechanisms in PH13-8Mo stainless steel as a function of aging temperature was carried out. It showed there was a desirable combination of high yield strength (~1.3 GPa) and V-notched impact toughness (~220 J) after aging between 540 and 550 °C. With the increase of aging temperature, the martensite matrix was recovered in terms of the refined sub-grains and higher ratio of high-angle grain boundaries (HAGBs). It should be noted there was a reversion of martensite to form austenite films subjected to aging above 540 °C; meanwhile, the NiAl precipitates maintained a well-coherent orientation with the matrix. Based on the post mortem analysis, there were three stages of the changing main toughening mechanisms: Stage I: low-temperature aging at around 510 °C, where the HAGBs contributed to the toughness by retarding the advance of cracks; Stage II: intermediate-temperature aging at around 540 °C, where the recovered laths embedded by soft austenite facilitated the improvement of toughness by synergistically increasing the advance path and blunting the crack tips; and Stage III: without the coarsening of NiAl precipitates around 560 °C, more inter-lath reversed austenite led to the optimum toughness, relying on “soft barrier” and transformation-induced plasticity (TRIP) effects.
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spelling pubmed-102212532023-05-28 Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment Zhang, Honglin Mi, Peng Hao, Luhan Zhou, Haichong Yan, Wei Zhao, Kuan Xu, Bin Sun, Mingyue Materials (Basel) Article PH13-8Mo stainless steel has been widely used in aerospace, petroleum and marine construction, obtaining continuous investigation attention in recent years. Based on the response of a hierarchical martensite matrix and possible reversed austenite, a systematic investigation of the evolution of the toughening mechanisms in PH13-8Mo stainless steel as a function of aging temperature was carried out. It showed there was a desirable combination of high yield strength (~1.3 GPa) and V-notched impact toughness (~220 J) after aging between 540 and 550 °C. With the increase of aging temperature, the martensite matrix was recovered in terms of the refined sub-grains and higher ratio of high-angle grain boundaries (HAGBs). It should be noted there was a reversion of martensite to form austenite films subjected to aging above 540 °C; meanwhile, the NiAl precipitates maintained a well-coherent orientation with the matrix. Based on the post mortem analysis, there were three stages of the changing main toughening mechanisms: Stage I: low-temperature aging at around 510 °C, where the HAGBs contributed to the toughness by retarding the advance of cracks; Stage II: intermediate-temperature aging at around 540 °C, where the recovered laths embedded by soft austenite facilitated the improvement of toughness by synergistically increasing the advance path and blunting the crack tips; and Stage III: without the coarsening of NiAl precipitates around 560 °C, more inter-lath reversed austenite led to the optimum toughness, relying on “soft barrier” and transformation-induced plasticity (TRIP) effects. MDPI 2023-05-10 /pmc/articles/PMC10221253/ /pubmed/37241257 http://dx.doi.org/10.3390/ma16103630 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Honglin
Mi, Peng
Hao, Luhan
Zhou, Haichong
Yan, Wei
Zhao, Kuan
Xu, Bin
Sun, Mingyue
Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title_full Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title_fullStr Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title_full_unstemmed Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title_short Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment
title_sort evolution of toughening mechanisms in ph13-8mo stainless steel during aging treatment
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10221253/
https://www.ncbi.nlm.nih.gov/pubmed/37241257
http://dx.doi.org/10.3390/ma16103630
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