Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates
Fracturing by ductile damage occurs quite naturally in metal forming processes, and ductile fracture of strain-softening alloy, here 42CrMo steel, cannot be evaluated through simple procedures such as tension testing. Under these circumstances, it is very significant and economical to find a way to...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/579328 |
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| author | Guo-zheng Quan Gui-chang Luo An Mao Jian-ting Liang Dong-sen Wu |
| author_facet | Guo-zheng Quan Gui-chang Luo An Mao Jian-ting Liang Dong-sen Wu |
| author_sort | Guo-zheng Quan |
| collection | DOAJ |
| description | Fracturing by ductile damage occurs quite naturally in metal forming processes, and ductile fracture of strain-softening alloy, here 42CrMo steel, cannot be evaluated through simple procedures such as tension testing. Under these circumstances, it is very significant and economical to find a way to evaluate the ductile fracture criteria (DFC) and identify the relationships between damage evolution and deformation conditions. Under the guidance of the Cockcroft-Latham fracture criteria, an innovative approach involving hot compression tests, numerical simulations, and mathematic computations provides mutual support to evaluate ductile damage cumulating process and DFC diagram along with deformation conditions, which has not been expounded by Cockcroft and Latham. The results show that the maximum damage value appears in the region of upsetting drum, while the minimal value appears in the middle region. Furthermore, DFC of 42CrMo steel at temperature range of 1123~1348 K and strain rate of 0.01~10 s-1 are not constant but change in a range of 0.160~0.226; thus, they have been defined as varying ductile fracture criteria (VDFC) and characterized by a function of temperature and strain rate. In bulk forming operations, VDFC help technicians to choose suitable process parameters and avoid the occurrence of fracture. |
| format | Article |
| id | doaj-art-4d0a30a6a63b4ce6aefcb36de8d3372a |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-4d0a30a6a63b4ce6aefcb36de8d3372a2025-08-20T03:34:18ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/579328579328Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain RatesGuo-zheng Quan0Gui-chang Luo1An Mao2Jian-ting Liang3Dong-sen Wu4School of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaFracturing by ductile damage occurs quite naturally in metal forming processes, and ductile fracture of strain-softening alloy, here 42CrMo steel, cannot be evaluated through simple procedures such as tension testing. Under these circumstances, it is very significant and economical to find a way to evaluate the ductile fracture criteria (DFC) and identify the relationships between damage evolution and deformation conditions. Under the guidance of the Cockcroft-Latham fracture criteria, an innovative approach involving hot compression tests, numerical simulations, and mathematic computations provides mutual support to evaluate ductile damage cumulating process and DFC diagram along with deformation conditions, which has not been expounded by Cockcroft and Latham. The results show that the maximum damage value appears in the region of upsetting drum, while the minimal value appears in the middle region. Furthermore, DFC of 42CrMo steel at temperature range of 1123~1348 K and strain rate of 0.01~10 s-1 are not constant but change in a range of 0.160~0.226; thus, they have been defined as varying ductile fracture criteria (VDFC) and characterized by a function of temperature and strain rate. In bulk forming operations, VDFC help technicians to choose suitable process parameters and avoid the occurrence of fracture.http://dx.doi.org/10.1155/2014/579328 |
| spellingShingle | Guo-zheng Quan Gui-chang Luo An Mao Jian-ting Liang Dong-sen Wu Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates The Scientific World Journal |
| title | Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates |
| title_full | Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates |
| title_fullStr | Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates |
| title_full_unstemmed | Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates |
| title_short | Evaluation of Varying Ductile Fracture Criteria for 42CrMo Steel by Compressions at Different Temperatures and Strain Rates |
| title_sort | evaluation of varying ductile fracture criteria for 42crmo steel by compressions at different temperatures and strain rates |
| url | http://dx.doi.org/10.1155/2014/579328 |
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