Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys
A fitting method capable of describing the fatigue crack growth rate (FCGR) data in all stages of crack propagation by a simple Forman-style analytical formula was developed. To demonstrate its robustness, this method was used to quantify the fracture behavior of RF-plasma-sprayed W, Mo, W-Mo compos...
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MDPI AG
2023-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/4/1713 |
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| author | Ondrej Kovarik Jan Cizek Jakub Klecka |
| author_facet | Ondrej Kovarik Jan Cizek Jakub Klecka |
| author_sort | Ondrej Kovarik |
| collection | DOAJ |
| description | A fitting method capable of describing the fatigue crack growth rate (FCGR) data in all stages of crack propagation by a simple Forman-style analytical formula was developed. To demonstrate its robustness, this method was used to quantify the fracture behavior of RF-plasma-sprayed W, Mo, W-Mo composite, and four selected Ni-based tungsten heavy alloys (WHA). The fitted FCGR parameters categorized the studied materials into two distinct sets. W, Mo, and W-Mo composite deposits made from inherently brittle refractory metals that contained a range of defects inherent to plasma spray process represented the first class. This class was characterized by low fracture toughness and a relatively wide range of fatigue crack growth thresholds. The second class of materials was represented by WHA. Here, the deposit defects were suppressed by liquid state diffusion that formed a typical WHA structure consisting of a Ni-rich matrix and large spherical W reinforcement particles. The WHA generally showed higher fatigue crack growth thresholds, but differed in fracture toughness values based on the W particle concentrations. The obtained fracture mechanical data represent a reference dataset of plasma-sprayed refractory materials, and their classification into groups clearly demonstrates the capabilities of the developed method to capture a wide range of different types of FCGR behavior. |
| first_indexed | 2024-03-11T08:29:24Z |
| format | Article |
| id | doaj.art-66ecdad1b2e547828db00b5b3c0e90bf |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T08:29:24Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-66ecdad1b2e547828db00b5b3c0e90bf2023-11-16T21:53:31ZengMDPI AGMaterials1996-19442023-02-01164171310.3390/ma16041713Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and AlloysOndrej Kovarik0Jan Cizek1Jakub Klecka2Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Prague 2, Czech RepublicInstitute of Plasma Physics of the Czech Academy of Sciences, Za Slovankou 1782/3, 182 00 Prague 8, Czech RepublicFaculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00 Prague 2, Czech RepublicA fitting method capable of describing the fatigue crack growth rate (FCGR) data in all stages of crack propagation by a simple Forman-style analytical formula was developed. To demonstrate its robustness, this method was used to quantify the fracture behavior of RF-plasma-sprayed W, Mo, W-Mo composite, and four selected Ni-based tungsten heavy alloys (WHA). The fitted FCGR parameters categorized the studied materials into two distinct sets. W, Mo, and W-Mo composite deposits made from inherently brittle refractory metals that contained a range of defects inherent to plasma spray process represented the first class. This class was characterized by low fracture toughness and a relatively wide range of fatigue crack growth thresholds. The second class of materials was represented by WHA. Here, the deposit defects were suppressed by liquid state diffusion that formed a typical WHA structure consisting of a Ni-rich matrix and large spherical W reinforcement particles. The WHA generally showed higher fatigue crack growth thresholds, but differed in fracture toughness values based on the W particle concentrations. The obtained fracture mechanical data represent a reference dataset of plasma-sprayed refractory materials, and their classification into groups clearly demonstrates the capabilities of the developed method to capture a wide range of different types of FCGR behavior.https://www.mdpi.com/1996-1944/16/4/1713fatigue crack growthanalytical modelrefractory materialsRF plasma spray |
| spellingShingle | Ondrej Kovarik Jan Cizek Jakub Klecka Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys Materials fatigue crack growth analytical model refractory materials RF plasma spray |
| title | Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys |
| title_full | Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys |
| title_fullStr | Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys |
| title_full_unstemmed | Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys |
| title_short | Fatigue Crack Growth Rate Description of RF-Plasma-Sprayed Refractory Metals and Alloys |
| title_sort | fatigue crack growth rate description of rf plasma sprayed refractory metals and alloys |
| topic | fatigue crack growth analytical model refractory materials RF plasma spray |
| url | https://www.mdpi.com/1996-1944/16/4/1713 |
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