Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C
As a newly developed gun barrel steel, the novel steel has shown excellent high-temperature strength, high resistance to wear and erosion, contributing to the superior ballistic life of gun barrels. As ballistic life increases, the fatigue life becomes essential for the safety and reliability of gun...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/24/5753 |
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| author | Chao Zhao Jin Zhang Jiawei Fu Yong Lian Zunjun Zhang Cheng Zhang Jinfeng Huang |
| author_facet | Chao Zhao Jin Zhang Jiawei Fu Yong Lian Zunjun Zhang Cheng Zhang Jinfeng Huang |
| author_sort | Chao Zhao |
| collection | DOAJ |
| description | As a newly developed gun barrel steel, the novel steel has shown excellent high-temperature strength, high resistance to wear and erosion, contributing to the superior ballistic life of gun barrels. As ballistic life increases, the fatigue life becomes essential for the safety and reliability of gun barrels. This paper presents a comparison of the low cycle fatigue (LCF) behaviors between a novel steel and 30SiMn2MoV steel at 700 °C. A strain-controlled fatigue test was carried out on the novel steel and 30SiMn2MoV steel in the strain range from 0.2 to 0.6%. The cyclic stress response behaviors of the novel steel and 30SiMn2MoV steel show cyclic softening behavior. In addition, the shape of the hysteresis rings of the novel steel and 30SiMn2MoV steel exhibit no-Masing model behavior. Energy–life relationships results show that the novel steel has higher fatigue resistance than the 30SiMn2MoV steel at 700 °C. The results of fatigue fracture analysis show that the failure mode of the 30SiMn2MoV steel is a mixed mode of intergranular fracture and transgranular fracture, while the failure mode of the novel steel is intergranular fracture. The cyclic softening of the two materials can be attributed to the lath structure with a high density of dislocations gradually transforms into low energy subcrystalline and cellular structures at 700 °C. The novel steel has a better fatigue life than the 30SiMn2MoV steel at 700 °C and different strain amplitudes, which is mainly related to the carbides and lath martensite in the materials. |
| first_indexed | 2024-03-10T14:01:04Z |
| format | Article |
| id | doaj.art-70d0a1f26f9a47f4a903a247e93af079 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T14:01:04Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-70d0a1f26f9a47f4a903a247e93af0792023-11-21T01:08:19ZengMDPI AGMaterials1996-19442020-12-011324575310.3390/ma13245753Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °CChao Zhao0Jin Zhang1Jiawei Fu2Yong Lian3Zunjun Zhang4Cheng Zhang5Jinfeng Huang6Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaInstitute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, ChinaAs a newly developed gun barrel steel, the novel steel has shown excellent high-temperature strength, high resistance to wear and erosion, contributing to the superior ballistic life of gun barrels. As ballistic life increases, the fatigue life becomes essential for the safety and reliability of gun barrels. This paper presents a comparison of the low cycle fatigue (LCF) behaviors between a novel steel and 30SiMn2MoV steel at 700 °C. A strain-controlled fatigue test was carried out on the novel steel and 30SiMn2MoV steel in the strain range from 0.2 to 0.6%. The cyclic stress response behaviors of the novel steel and 30SiMn2MoV steel show cyclic softening behavior. In addition, the shape of the hysteresis rings of the novel steel and 30SiMn2MoV steel exhibit no-Masing model behavior. Energy–life relationships results show that the novel steel has higher fatigue resistance than the 30SiMn2MoV steel at 700 °C. The results of fatigue fracture analysis show that the failure mode of the 30SiMn2MoV steel is a mixed mode of intergranular fracture and transgranular fracture, while the failure mode of the novel steel is intergranular fracture. The cyclic softening of the two materials can be attributed to the lath structure with a high density of dislocations gradually transforms into low energy subcrystalline and cellular structures at 700 °C. The novel steel has a better fatigue life than the 30SiMn2MoV steel at 700 °C and different strain amplitudes, which is mainly related to the carbides and lath martensite in the materials.https://www.mdpi.com/1996-1944/13/24/5753the novel steel30SiMn2MoV steelhigh temperature LCFstrain energy densityfatigue fracture |
| spellingShingle | Chao Zhao Jin Zhang Jiawei Fu Yong Lian Zunjun Zhang Cheng Zhang Jinfeng Huang Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C Materials the novel steel 30SiMn2MoV steel high temperature LCF strain energy density fatigue fracture |
| title | Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C |
| title_full | Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C |
| title_fullStr | Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C |
| title_full_unstemmed | Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C |
| title_short | Low-Cycle Fatigue Behavior of the Novel Steel and 30SiMn2MoV Steel at 700 °C |
| title_sort | low cycle fatigue behavior of the novel steel and 30simn2mov steel at 700 °c |
| topic | the novel steel 30SiMn2MoV steel high temperature LCF strain energy density fatigue fracture |
| url | https://www.mdpi.com/1996-1944/13/24/5753 |
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