{"id":{"repo_id":"tu-berlin","oai_identifier":"oai:depositonce.tu-berlin.de:11303/21141"},"canonical_url":"https://search.dev.ndltd.org/etd/tu-berlin/oai:depositonce.tu-berlin.de:11303/21141","repository":{"repo_id":"tu-berlin","name":"Technische Universität Berlin","base_url":"https://api-depositonce.tu-berlin.de/server/oai/request"},"display":{"title":"Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales","abstract":"The β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr (Ti-5553) has recently found growing interest as medical implant material due to its advantageous mechanical properties when compared to the up-to-date standard alloys. Besides biocompatibility, implant materials need to exhibit sufficient fatigue resistance. This thesis investigates the fatigue and cyclic deformation behavior on different length scales of Ti-5553, made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the α-precipitates orientation and distribution influence the deformation behavior of Ti-5553 in the (α+β)-solution annealed state (ST) during cyclic nanoindentation. In addition, quasi-static and cyclic nanoindentation tests were conducted to investigate the mechanical properties of LPBF-M Ti-5553 in the “as-built”, (α+β)-solution annealed and aged (STA) and β-annealed, slowly cooled, and aged (BASCA) conditions. Microstructural variations notably influence the nanohardness, reduced elastic modulus, plasticity, and cyclic deformation behavior of Ti-5553. The macro-scale perspective summarizes the cyclic deformation behavior of shot-peened Ti-5553 specimens in Hanks’ balanced salt solution (HBSS). Changes in the free corrosion potential and the corrosion current are highly sensitive indicators for fatigue-induced damage on a rough surface, which was correlated to the microscopic examination, fracture surface features, and fatigue crack development. The gained deeper understanding of the mechanical performance of this promising β-metastable alloy across different microstructures and different length scales helps establish a foundation for predicting fatigue characteristics and optimizing LPBF-M Ti-5553 alloy performance, especially in the context of implant materials.","abstract_html":"The β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr (Ti-5553) has recently found growing interest as medical implant material due to its advantageous mechanical properties when compared to the up-to-date standard alloys. Besides biocompatibility, implant materials need to exhibit sufficient fatigue resistance. This thesis investigates the fatigue and cyclic deformation behavior on different length scales of Ti-5553, made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the α-precipitates orientation and distribution influence the deformation behavior of Ti-5553 in the (α+β)-solution annealed state (ST) during cyclic nanoindentation. In addition, quasi-static and cyclic nanoindentation tests were conducted to investigate the mechanical properties of LPBF-M Ti-5553 in the “as-built”, (α+β)-solution annealed and aged (STA) and β-annealed, slowly cooled, and aged (BASCA) conditions. Microstructural variations notably influence the nanohardness, reduced elastic modulus, plasticity, and cyclic deformation behavior of Ti-5553. The macro-scale perspective summarizes the cyclic deformation behavior of shot-peened Ti-5553 specimens in Hanks’ balanced salt solution (HBSS). Changes in the free corrosion potential and the corrosion current are highly sensitive indicators for fatigue-induced damage on a rough surface, which was correlated to the microscopic examination, fracture surface features, and fatigue crack development. The gained deeper understanding of the mechanical performance of this promising β-metastable alloy across different microstructures and different length scales helps establish a foundation for predicting fatigue characteristics and optimizing LPBF-M Ti-5553 alloy performance, especially in the context of implant materials.","abstract_has_math":false,"creators":["Alves Alcântara, Erika Gabriele"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Fleck, Claudia"],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024","date_published":"2024","updated_at":"2026-07-27T21:28:54Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":["https://creativecommons.org/licenses/by-nc-nd/4.0/"],"identifier_entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://doi.org/10.14279/depositonce-19941"],"render_values":[{"text":"https://doi.org/10.14279/depositonce-19941","href":"https://doi.org/10.14279/depositonce-19941","code":true}]}]},"links":{"outbound_url":"https://depositonce.tu-berlin.de/handle/11303/21141","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Fleck, Claudia"]},{"key":"dc:creator","label":"Author","values":["Alves Alcântara, Erika Gabriele"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2024-03-05T14:29:10Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-03-05T14:29:10Z"]},{"key":"dc:date.issued","label":"Date","values":["2024"]},{"key":"dc:type","label":"Dc Type","values":["Doctoral Thesis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights.uri","label":"Rights URI","values":["https://creativecommons.org/licenses/by-nc-nd/4.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://depositonce.tu-berlin.de/handle/11303/21141","https://doi.org/10.14279/depositonce-19941"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr (Ti-5553) has recently found growing interest as medical implant material due to its advantageous mechanical properties when compared to the up-to-date standard alloys. Besides biocompatibility, implant materials need to exhibit sufficient fatigue resistance. This thesis investigates the fatigue and cyclic deformation behavior on different length scales of Ti-5553, made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the α-precipitates orientation and distribution influence the deformation behavior of Ti-5553 in the (α+β)-solution annealed state (ST) during cyclic nanoindentation. In addition, quasi-static and cyclic nanoindentation tests were conducted to investigate the mechanical properties of LPBF-M Ti-5553 in the “as-built”, (α+β)-solution annealed and aged (STA) and β-annealed, slowly cooled, and aged (BASCA) conditions. Microstructural variations notably influence the nanohardness, reduced elastic modulus, plasticity, and cyclic deformation behavior of Ti-5553. The macro-scale perspective summarizes the cyclic deformation behavior of shot-peened Ti-5553 specimens in Hanks’ balanced salt solution (HBSS). Changes in the free corrosion potential and the corrosion current are highly sensitive indicators for fatigue-induced damage on a rough surface, which was correlated to the microscopic examination, fracture surface features, and fatigue crack development. The gained deeper understanding of the mechanical performance of this promising β-metastable alloy across different microstructures and different length scales helps establish a foundation for predicting fatigue characteristics and optimizing LPBF-M Ti-5553 alloy performance, especially in the context of implant materials.","Die β-metastabile Titanlegierung Ti-5Al-5V-5Mo-3Cr (Ti-5553) hat aufgrund ihrer im Vergleich zu den aktuellen Standardlegierungen vorteilhaften mechanischen Eigenschaften in letzter Zeit wachsendes Interesse als Material für medizinische Implantate gefunden. Neben der Biokompatibilität müssen Implantatmaterialien eine ausreichende Ermüdungsbeständigkeit aufweisen. Diese Arbeit untersucht das Ermüdungs- und zyklische Verformungsverhalten auf verschiedenen Längenskalen der Ti-5553, hergestellt durch Laser-Pulverbettschmelzen von Metallen (engl. LPBF-M), mit unterschiedlichen Mikrostrukturen, die aus verschiedenen Wärmebehandlungen resultieren. Die Untersuchung in der Nanoskala zeigt, wie die Ausrichtung und Verteilung der α-Ausscheidungen das Verformungsverhalten von Ti-5553 im (α+β)-lösungsgeglühten Zustand (engl. ST) während der zyklischen Nanoindentation beeinflusst. Darüber hinaus wurden quasistatische und zyklische Nanoindentationstests durchgeführt, um die mechanischen Eigenschaften von LPBF-M Ti-5553 in den konturnahen (engl. „as-built“), (α+β)-lösungsgeglühten und gealterten (engl. STA) und β-geglühten, langsam abgekühlten und gealterten (engl. BASCA) Zustände zu untersuchen. Mikrostrukturelle Variationen beeinflussen insbesondere die Nanohärte, den reduced Elastizitätsmodul, die Plastizität und das zyklische Verformungsverhalten von Ti-5553. Die Makroperspektive fasst das zyklische Verformungsverhalten von kugelgestrahlten Ti-5553-Proben in Hanks‘ ausgewogener Salzlösung (engl. HBSS) zusammen. Änderungen des freien Korrosionspotentials und des Korrosionsstroms sind hochempfindliche Indikatoren für ermüdungsbedingte Schäden an einer rauen Oberfläche, die mit der mikroskopischen Untersuchung, den Merkmalen der Bruchoberfläche und der Entwicklung von Ermüdungsrissen korreliert wurden. Das gewonnene tiefere Verständnis der mechanischen Leistung dieser vielversprechenden β-metastabilen Legierung über verschiedene Mikrostrukturen und verschiedene Längenskalen trägt dazu bei, eine Grundlage für die Vorhersage von Ermüdungseigenschaften und die Optimierung der Leistung der LPBF-M Ti-5553-Legierung zu schaffen, insbesondere im Zusammenhang mit Implantatmaterialien."]},{"key":"dc:title","label":"Title","values":["Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales"]}]}],"canonical_facts":{"dc:contributor.advisor":["Fleck, Claudia"],"dc:creator":["Alves Alcântara, Erika Gabriele"],"dc:date.accessioned":["2024-03-05T14:29:10Z"],"dc:date.available":["2024-03-05T14:29:10Z"],"dc:date.issued":["2024"],"dc:description.abstract":["The β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr (Ti-5553) has recently found growing interest as medical implant material due to its advantageous mechanical properties when compared to the up-to-date standard alloys. Besides biocompatibility, implant materials need to exhibit sufficient fatigue resistance. This thesis investigates the fatigue and cyclic deformation behavior on different length scales of Ti-5553, made by laser powder bed fusion of metals (LPBF-M), with distinct microstructures resulting from different heat treatments. The nano-scale investigation reveals how the α-precipitates orientation and distribution influence the deformation behavior of Ti-5553 in the (α+β)-solution annealed state (ST) during cyclic nanoindentation. In addition, quasi-static and cyclic nanoindentation tests were conducted to investigate the mechanical properties of LPBF-M Ti-5553 in the “as-built”, (α+β)-solution annealed and aged (STA) and β-annealed, slowly cooled, and aged (BASCA) conditions. Microstructural variations notably influence the nanohardness, reduced elastic modulus, plasticity, and cyclic deformation behavior of Ti-5553. The macro-scale perspective summarizes the cyclic deformation behavior of shot-peened Ti-5553 specimens in Hanks’ balanced salt solution (HBSS). Changes in the free corrosion potential and the corrosion current are highly sensitive indicators for fatigue-induced damage on a rough surface, which was correlated to the microscopic examination, fracture surface features, and fatigue crack development. The gained deeper understanding of the mechanical performance of this promising β-metastable alloy across different microstructures and different length scales helps establish a foundation for predicting fatigue characteristics and optimizing LPBF-M Ti-5553 alloy performance, especially in the context of implant materials.","Die β-metastabile Titanlegierung Ti-5Al-5V-5Mo-3Cr (Ti-5553) hat aufgrund ihrer im Vergleich zu den aktuellen Standardlegierungen vorteilhaften mechanischen Eigenschaften in letzter Zeit wachsendes Interesse als Material für medizinische Implantate gefunden. Neben der Biokompatibilität müssen Implantatmaterialien eine ausreichende Ermüdungsbeständigkeit aufweisen. Diese Arbeit untersucht das Ermüdungs- und zyklische Verformungsverhalten auf verschiedenen Längenskalen der Ti-5553, hergestellt durch Laser-Pulverbettschmelzen von Metallen (engl. LPBF-M), mit unterschiedlichen Mikrostrukturen, die aus verschiedenen Wärmebehandlungen resultieren. Die Untersuchung in der Nanoskala zeigt, wie die Ausrichtung und Verteilung der α-Ausscheidungen das Verformungsverhalten von Ti-5553 im (α+β)-lösungsgeglühten Zustand (engl. ST) während der zyklischen Nanoindentation beeinflusst. Darüber hinaus wurden quasistatische und zyklische Nanoindentationstests durchgeführt, um die mechanischen Eigenschaften von LPBF-M Ti-5553 in den konturnahen (engl. „as-built“), (α+β)-lösungsgeglühten und gealterten (engl. STA) und β-geglühten, langsam abgekühlten und gealterten (engl. BASCA) Zustände zu untersuchen. Mikrostrukturelle Variationen beeinflussen insbesondere die Nanohärte, den reduced Elastizitätsmodul, die Plastizität und das zyklische Verformungsverhalten von Ti-5553. Die Makroperspektive fasst das zyklische Verformungsverhalten von kugelgestrahlten Ti-5553-Proben in Hanks‘ ausgewogener Salzlösung (engl. HBSS) zusammen. Änderungen des freien Korrosionspotentials und des Korrosionsstroms sind hochempfindliche Indikatoren für ermüdungsbedingte Schäden an einer rauen Oberfläche, die mit der mikroskopischen Untersuchung, den Merkmalen der Bruchoberfläche und der Entwicklung von Ermüdungsrissen korreliert wurden. Das gewonnene tiefere Verständnis der mechanischen Leistung dieser vielversprechenden β-metastabilen Legierung über verschiedene Mikrostrukturen und verschiedene Längenskalen trägt dazu bei, eine Grundlage für die Vorhersage von Ermüdungseigenschaften und die Optimierung der Leistung der LPBF-M Ti-5553-Legierung zu schaffen, insbesondere im Zusammenhang mit Implantatmaterialien."],"dc:identifier.uri":["https://depositonce.tu-berlin.de/handle/11303/21141","https://doi.org/10.14279/depositonce-19941"],"dc:language.iso":["en"],"dc:rights.uri":["https://creativecommons.org/licenses/by-nc-nd/4.0/"],"dc:title":["Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales"],"dc:type":["Doctoral Thesis"]},"updated_at":"2026-07-27T21:28:54Z"}