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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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/10/3630 |
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| author | Honglin Zhang Peng Mi Luhan Hao Haichong Zhou Wei Yan Kuan Zhao Bin Xu Mingyue Sun |
| author_facet | Honglin Zhang Peng Mi Luhan Hao Haichong Zhou Wei Yan Kuan Zhao Bin Xu Mingyue Sun |
| author_sort | Honglin Zhang |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-11T03:33:47Z |
| format | Article |
| id | doaj.art-b42a98beadef437fa40a22af7e033ad1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:33:47Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b42a98beadef437fa40a22af7e033ad12023-11-18T02:13:43ZengMDPI AGMaterials1996-19442023-05-011610363010.3390/ma16103630Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging TreatmentHonglin Zhang0Peng Mi1Luhan Hao2Haichong Zhou3Wei Yan4Kuan Zhao5Bin Xu6Mingyue Sun7Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaSchool of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Shenyang 110016, ChinaChina Aerodynamics Research and Development Center, Mianyang 621000, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaKey Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaPH13-8Mo 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.https://www.mdpi.com/1996-1944/16/10/3630PH13-8Mo stainless steelaging treatmentheterogeneous microstructurestoughening mechanisms |
| spellingShingle | Honglin Zhang Peng Mi Luhan Hao Haichong Zhou Wei Yan Kuan Zhao Bin Xu Mingyue Sun Evolution of Toughening Mechanisms in PH13-8Mo Stainless Steel during Aging Treatment Materials PH13-8Mo stainless steel aging treatment heterogeneous microstructures toughening mechanisms |
| 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 | PH13-8Mo stainless steel aging treatment heterogeneous microstructures toughening mechanisms |
| url | https://www.mdpi.com/1996-1944/16/10/3630 |
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