Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing
The transformation of carbides in a 1.9Cr-1.4Mo-0.3 V secondary hardening steel that was subjected to over-ageing at 600 °C–700 °C has been investigated. The carbides were characterized using scanning electron microscope (SEM), x-ray diffraction (XRD), inductively coupled plasma-atomic emission spec...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab7c86 |
| _version_ | 1797746404482875392 |
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| author | Xing He Chundong Hu Zimeng Wang Hongshan Zhao Xicheng Wei Han Dong |
| author_facet | Xing He Chundong Hu Zimeng Wang Hongshan Zhao Xicheng Wei Han Dong |
| author_sort | Xing He |
| collection | DOAJ |
| description | The transformation of carbides in a 1.9Cr-1.4Mo-0.3 V secondary hardening steel that was subjected to over-ageing at 600 °C–700 °C has been investigated. The carbides were characterized using scanning electron microscope (SEM), x-ray diffraction (XRD), inductively coupled plasma-atomic emission spectrometry (ICP-AES), and transmission electron microscopy (TEM) preformed on carbon replicas. The results indicate that MC, M _2 C, and M _3 C were formed during over-ageing from 600 to 700 °C, whereas M _7 C _3 , and M _23 C _6 started to be formed at 650 and 700 °C, respectively. In addition, the co-existence of hexagonal and orthorhombic M _7 C _3 structures in a carbide particle was firstly observed. M _3 C was transformed to other carbides, and the formation of both M _2 C and M _23 C _6 may follow the ‘separate nucleation’ mechanism, whereas M _7 C _3 was transformed from M _3 C via the ‘ in situ nucleation’ mechanism. The crystallographic orientation relationships between the in situ transformed M _7 C _3 and M _3 C are ${(11\bar{2})}_{{{\rm{M}}}_{{\rm{3}}}{\rm{C}}}\,//\,{(3\bar{3}0\bar{1})}_{{{\rm{M}}}_{{\rm{7}}}{{\rm{C}}}_{{\rm{3}}}}$ ${\rm{and}}\,{[312]}_{{{\rm{M}}}_{{\rm{3}}}{\rm{C}}}\,//\,{[10\bar{1}3]}_{{{\rm{M}}}_{{\rm{7}}}{{\rm{C}}}_{{\rm{3}}}}.$ |
| first_indexed | 2024-03-12T15:37:21Z |
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| id | doaj.art-6c998b8a40474641bfcee5f2b6eef2ee |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:37:21Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-6c998b8a40474641bfcee5f2b6eef2ee2023-08-09T16:10:19ZengIOP PublishingMaterials Research Express2053-15912020-01-017303651110.1088/2053-1591/ab7c86Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageingXing He0Chundong Hu1https://orcid.org/0000-0003-1117-544XZimeng Wang2Hongshan Zhao3Xicheng Wei4Han Dong5School of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaSchool of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaSchool of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaSchool of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaSchool of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaSchool of Materials Science and Engineering, Shanghai University , Shanghai 200444, People’s Republic of ChinaThe transformation of carbides in a 1.9Cr-1.4Mo-0.3 V secondary hardening steel that was subjected to over-ageing at 600 °C–700 °C has been investigated. The carbides were characterized using scanning electron microscope (SEM), x-ray diffraction (XRD), inductively coupled plasma-atomic emission spectrometry (ICP-AES), and transmission electron microscopy (TEM) preformed on carbon replicas. The results indicate that MC, M _2 C, and M _3 C were formed during over-ageing from 600 to 700 °C, whereas M _7 C _3 , and M _23 C _6 started to be formed at 650 and 700 °C, respectively. In addition, the co-existence of hexagonal and orthorhombic M _7 C _3 structures in a carbide particle was firstly observed. M _3 C was transformed to other carbides, and the formation of both M _2 C and M _23 C _6 may follow the ‘separate nucleation’ mechanism, whereas M _7 C _3 was transformed from M _3 C via the ‘ in situ nucleation’ mechanism. The crystallographic orientation relationships between the in situ transformed M _7 C _3 and M _3 C are ${(11\bar{2})}_{{{\rm{M}}}_{{\rm{3}}}{\rm{C}}}\,//\,{(3\bar{3}0\bar{1})}_{{{\rm{M}}}_{{\rm{7}}}{{\rm{C}}}_{{\rm{3}}}}$ ${\rm{and}}\,{[312]}_{{{\rm{M}}}_{{\rm{3}}}{\rm{C}}}\,//\,{[10\bar{1}3]}_{{{\rm{M}}}_{{\rm{7}}}{{\rm{C}}}_{{\rm{3}}}}.$https://doi.org/10.1088/2053-1591/ab7c86secondary hardening steelcarbidesover-ageingin-situ nucleation |
| spellingShingle | Xing He Chundong Hu Zimeng Wang Hongshan Zhao Xicheng Wei Han Dong Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing Materials Research Express secondary hardening steel carbides over-ageing in-situ nucleation |
| title | Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing |
| title_full | Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing |
| title_fullStr | Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing |
| title_full_unstemmed | Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing |
| title_short | Carbide transformation behaviors of a Cr–Mo–V secondary hardening steel during over-ageing |
| title_sort | carbide transformation behaviors of a cr mo v secondary hardening steel during over ageing |
| topic | secondary hardening steel carbides over-ageing in-situ nucleation |
| url | https://doi.org/10.1088/2053-1591/ab7c86 |
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