Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel
Bending deformation is a typical forming method in the manufacturing process of mechanical equipment. NM450 wear-resistant steel with high strength is vulnerable to bending failure, thus decreasing the bendability. The changes in microstructure and mechanical properties of NM450 wear-resistant steel...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac68d6 |
| _version_ | 1797746631013040128 |
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| author | Jingshu He Fengyong Niu Xiurong Zuo Denghui Liu Minghui Cai |
| author_facet | Jingshu He Fengyong Niu Xiurong Zuo Denghui Liu Minghui Cai |
| author_sort | Jingshu He |
| collection | DOAJ |
| description | Bending deformation is a typical forming method in the manufacturing process of mechanical equipment. NM450 wear-resistant steel with high strength is vulnerable to bending failure, thus decreasing the bendability. The changes in microstructure and mechanical properties of NM450 wear-resistant steel during the bending process were studied by scanning electron microscopy, energy dispersive spectroscopy, optical microscopy, transmission electron microscopy, electron backscattered diffractometer methods, and tensile test. The inner and outer arcs around the bending axis underwent compressive stress and tensile stress, respectively, causing an obvious bending deformation of the martensite laths with a high dislocation density. The tensile strength around the inner- and outer-arc of samples exceeded that at the mid-thickness. During the bending process, the microsized TiN inclusions nearby the outer arc were subjected to tensile stress and multiple microcracks/cavities perpendicular to the outer arc were formed. However, the microsized TiN inclusions nearby the inner arc underwent compressive stress, initiating the occurrence of divergent microcracks. |
| first_indexed | 2024-03-12T15:39:37Z |
| format | Article |
| id | doaj.art-d0e733883c694f1d819a9c7cb403017c |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:39:37Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-d0e733883c694f1d819a9c7cb403017c2023-08-09T16:02:42ZengIOP PublishingMaterials Research Express2053-15912022-01-019404652410.1088/2053-1591/ac68d6Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steelJingshu He0https://orcid.org/0000-0002-6526-2277Fengyong Niu1Xiurong Zuo2Denghui Liu3Minghui Cai4School of Physics and Microelectronics, Zhengzhou University , Zhengzhou 450001, People’s Republic of ChinaSchool of Physics and Microelectronics, Zhengzhou University , Zhengzhou 450001, People’s Republic of ChinaSchool of Physics and Microelectronics, Zhengzhou University , Zhengzhou 450001, People’s Republic of ChinaSchool of Physics and Microelectronics, Zhengzhou University , Zhengzhou 450001, People’s Republic of ChinaSchool of Materials Science and Engineering, Northeastern University , Shenyang 110819, People’s Republic of ChinaBending deformation is a typical forming method in the manufacturing process of mechanical equipment. NM450 wear-resistant steel with high strength is vulnerable to bending failure, thus decreasing the bendability. The changes in microstructure and mechanical properties of NM450 wear-resistant steel during the bending process were studied by scanning electron microscopy, energy dispersive spectroscopy, optical microscopy, transmission electron microscopy, electron backscattered diffractometer methods, and tensile test. The inner and outer arcs around the bending axis underwent compressive stress and tensile stress, respectively, causing an obvious bending deformation of the martensite laths with a high dislocation density. The tensile strength around the inner- and outer-arc of samples exceeded that at the mid-thickness. During the bending process, the microsized TiN inclusions nearby the outer arc were subjected to tensile stress and multiple microcracks/cavities perpendicular to the outer arc were formed. However, the microsized TiN inclusions nearby the inner arc underwent compressive stress, initiating the occurrence of divergent microcracks.https://doi.org/10.1088/2053-1591/ac68d6NM450 wear-resistant steelbendingmechanical propertymicrostructureTiN |
| spellingShingle | Jingshu He Fengyong Niu Xiurong Zuo Denghui Liu Minghui Cai Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel Materials Research Express NM450 wear-resistant steel bending mechanical property microstructure TiN |
| title | Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel |
| title_full | Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel |
| title_fullStr | Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel |
| title_full_unstemmed | Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel |
| title_short | Changes in microstructure and mechanical properties during the bending process of NM450 wear-resistant steel |
| title_sort | changes in microstructure and mechanical properties during the bending process of nm450 wear resistant steel |
| topic | NM450 wear-resistant steel bending mechanical property microstructure TiN |
| url | https://doi.org/10.1088/2053-1591/ac68d6 |
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