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Measurement of mechanical and fatigue properties using unified, simple-geometry specimens: Cold spray additively manufactured pure metals
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SYSNO ASEP 0555754 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Measurement of mechanical and fatigue properties using unified, simple-geometry specimens: Cold spray additively manufactured pure metals Author(s) Čížek, Jan (UFP-V) ORCID
Kovařík, O. (CZ)
Čupera, J. (CZ)
Kondás, J. (CZ)
Bajer, T. (CZ)
Šiška, Filip (UFM-A) RID, ORCID
Janovská, Michaela (UT-L) RID, ORCID
Seiner, Hanuš (UT-L) RID, ORCIDNumber of authors 8 Article number 126929 Source Title Surface and Coatings Technology. - : Elsevier - ISSN 0257-8972
Roč. 412, April (2021)Number of pages 12 s. Language eng - English Country CH - Switzerland Keywords Fatigue crack growth rate ; Four-point bending ; Fracture toughness ; Kinetic spray ; Stress strain Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films R&D Projects GA17-13573S GA ČR - Czech Science Foundation (CSF) EF16_019/0000778 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 ; UFM-A - RVO:68081723 ; UT-L - RVO:61388998 UT WOS 000655555000001 EID SCOPUS 85101938661 DOI 10.1016/j.surfcoat.2021.126929 Annotation A methodology that allows joint determination of fundamental engineering properties of materials/components vital to their efficient design and a safe service lifetime operation is presented. Using a combination of recently developed techniques, a simultaneous assessment of mechanical properties, fatigue crack growth rates, as well as fracture toughness is described. All these are performed using unified-geometry samples that are simple and easy to produce. The mechanical properties are measured in tensile and compressive modes, while the combination of developed bending test methods (quasi-static four-point bending and fatigue bending) enables to cover the fatigue loading from very low loads corresponding to crack propagation threshold values up to the high loads corresponding to a static fracture of the fracture toughness test. To validate and complement the bending data, additional resonant ultrasonic measurements of the corresponding properties are carried out. The methodology is partially suitable for testing of cold sprayed deposits. Therefore, Al, Cu, Ni and Ti deposits are tested and compared to cold-rolled sheet reference samples. The results are quantified in the form of NASGRO equation, widely used in software for prediction of fatigue lives. Together, the obtained set of data may be readily used for modeling of the performance of cold sprayed parts. Finally, fractographic analysis of the failed specimens is presented to describe the mechanisms leading to failure. At low loads, the reference sheets and the cold sprayed deposits exhibit similar behavior, where the cracks grow in a trans-crystalline mode without any significant interaction with deposit particle boundaries. Contrary to this, the behavior changes at higher loads: the particle interfaces in the cold sprayed deposits become the weak point and the cracks grow at high rates by inter-particle decohesion, while the sheet materials generally fail by striation mechanism at much lower rates. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S025789722100102X?via%3Dihub
Number of the records: 1