Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel
In this paper R-ratio effects on fatigue crack growth near threshold region of a metastable austenitic stainless steel (MASS) in two different conditions, i.e. annealed and cold rolled, is investigated. The authors present two approaches to correlate FCGR data for R = 0.1, 0.3, 0.5, 0.7 and K-max =...
| Authors: | ; ; |
|---|---|
| Format: | Article |
| Publication date: | 2015 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/76984 |
| Online Access: | https://hdl.handle.net/2117/76984 https://dx.doi.org/10.1016/j.ijfatigue.2015.02.016 |
| Access Level: | Open access |
| Keyword: | Stainless steel Fracture mechanics Fatigue crack propagation Metastable austenitic stainless steel Crack closure Delta K and K-max Martensitic transformation induced martensitic transformations load ratio trip steel propagation deformation model Acer inoxidable Mecànica de fractura Àrees temàtiques de la UPC::Enginyeria dels materials |
| _version_ | 1878739878618857472 |
|---|---|
| author | Martelo, D.F. |
| author2 | Mateo García, Antonio Manuel|||0000-0001-8336-6128 Chapetti, M.D. |
| author2_role | author author |
| author_browse | Chapetti, M.D. Martelo, D.F. Mateo García, Antonio Manuel|||0000-0001-8336-6128 |
| author_facet | Martelo, D.F. Mateo García, Antonio Manuel|||0000-0001-8336-6128 Chapetti, M.D. |
| author_role | author |
| collection | UPCommons. Portal del coneixement obert de la UPC |
| description | In this paper R-ratio effects on fatigue crack growth near threshold region of a metastable austenitic stainless steel (MASS) in two different conditions, i.e. annealed and cold rolled, is investigated. The authors present two approaches to correlate FCGR data for R = 0.1, 0.3, 0.5, 0.7 and K-max = 23 MPa root m using a two-parameters approach (Delta K, K-max and alpha in Kujawski's model) and crack closure model (using Elber's K-op, and in Donald's ACRn2 approaches). The K-op and ACRn2 were experimentally measured on a single edge tension specimens. The K-op measurements were performed using a modified method and based on ASTM standards. While the two driving force approaches correlate data well in the Paris region, they fail to correlate them in the threshold region. However, this correlation can be improved in the threshold region when a different alpha value from the Paris region is used. The authors indicated that two different mechanisms operate; one in the Paris region and another in the near threshold. Hence, they proposed to combine the two-parameter and crack closure approaches where Delta K is replaced by Delta K-eff (estimated by a new method proposed in this paper), which is shown to correlate the FCGR data for different stress ratios for annealed steel. The correlation for cold rolled condition shows improvement with the new approach but is not as good as for the annealed one. The author further suggests to modify K-max in the two-parameter approach. (C) 2015 Elsevier Ltd. All rights reserved. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_c9a25f00a84346b866a46ebe7b97c7a4 |
| institution | Universitat Politècnica de Catalunya (UPC) |
| instname_str | Universitat Politècnica de Catalunya (UPC) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:upcommons.upc.edu:2117/76984 |
| publishDate | 2015 |
| publishDateSort | 2015 |
| reponame_str | UPCommons. Portal del coneixement obert de la UPC |
| spelling | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel Martelo, D.F. Mateo García, Antonio Manuel|||0000-0001-8336-6128 Chapetti, M.D. Stainless steel Fracture mechanics Fatigue crack propagation Metastable austenitic stainless steel Crack closure Delta K and K-max Martensitic transformation induced martensitic transformations load ratio trip steel propagation deformation model Acer inoxidable Mecànica de fractura Àrees temàtiques de la UPC::Enginyeria dels materials In this paper R-ratio effects on fatigue crack growth near threshold region of a metastable austenitic stainless steel (MASS) in two different conditions, i.e. annealed and cold rolled, is investigated. The authors present two approaches to correlate FCGR data for R = 0.1, 0.3, 0.5, 0.7 and K-max = 23 MPa root m using a two-parameters approach (Delta K, K-max and alpha in Kujawski's model) and crack closure model (using Elber's K-op, and in Donald's ACRn2 approaches). The K-op and ACRn2 were experimentally measured on a single edge tension specimens. The K-op measurements were performed using a modified method and based on ASTM standards. While the two driving force approaches correlate data well in the Paris region, they fail to correlate them in the threshold region. However, this correlation can be improved in the threshold region when a different alpha value from the Paris region is used. The authors indicated that two different mechanisms operate; one in the Paris region and another in the near threshold. Hence, they proposed to combine the two-parameter and crack closure approaches where Delta K is replaced by Delta K-eff (estimated by a new method proposed in this paper), which is shown to correlate the FCGR data for different stress ratios for annealed steel. The correlation for cold rolled condition shows improvement with the new approach but is not as good as for the annealed one. The author further suggests to modify K-max in the two-parameter approach. (C) 2015 Elsevier Ltd. All rights reserved. Peer Reviewed https://hdl.handle.net/2117/76984 https://dx.doi.org/10.1016/j.ijfatigue.2015.02.016 |
| spellingShingle | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel Martelo, D.F. Stainless steel Fracture mechanics Fatigue crack propagation Metastable austenitic stainless steel Crack closure Delta K and K-max Martensitic transformation induced martensitic transformations load ratio trip steel propagation deformation model Acer inoxidable Mecànica de fractura Àrees temàtiques de la UPC::Enginyeria dels materials |
| title | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| title_full | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| title_fullStr | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| title_full_unstemmed | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| title_short | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| title_sort | Crack closure and fatigue crack growth near threshold of a metastable austenitic stainless steel |
| topic | Stainless steel Fracture mechanics Fatigue crack propagation Metastable austenitic stainless steel Crack closure Delta K and K-max Martensitic transformation induced martensitic transformations load ratio trip steel propagation deformation model Acer inoxidable Mecànica de fractura Àrees temàtiques de la UPC::Enginyeria dels materials |
| topic_facet | Stainless steel Fracture mechanics Fatigue crack propagation Metastable austenitic stainless steel Crack closure Delta K and K-max Martensitic transformation induced martensitic transformations load ratio trip steel propagation deformation model Acer inoxidable Mecànica de fractura Àrees temàtiques de la UPC::Enginyeria dels materials |
| url | https://hdl.handle.net/2117/76984 https://dx.doi.org/10.1016/j.ijfatigue.2015.02.016 |