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Journal of Materials Engineering and Performance

Erschienen in:

18.05.2022 | Technical Article

Fracture Behavior of GTD-111 Superalloy during In Situ Tensile Scanning Electron Microscopy

verfasst von: Yinwei Wang, Pengchao Zhang, Morteza Taheri, Behzad Babaei

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 12/2022

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Abstract

The deformation phenomenon and the fracture mechanism of the GTD-111 superalloy processed by selective laser melting were evaluated by in situ tensile scanning electron microscopy at 730 °C. Grain rotation and grain boundary slip were the most important mechanisms that occurred before fracture. As the grain boundary slip increased, holes and micro-cracks nucleated in the grain boundary. These micro-cracks extend into the grain, causing inter-granular fracture. At strains above 9%, micro-cracks occurred in the TiC carbides scattered within the grains, resulting in a change in fracture direction from grain boundary to inter-granular. The accumulation of dislocations behind the γ′ phase and the grain boundaries provided the driving force needed to start and propagate the crack.

Vorheriger Artikel Revealing the Relationship Between AlN Architectures and the Strengthening Mechanism of the AlN/Al Composites at 350 °C

Nächster Artikel Microstructure and Mechanical Properties of Aluminum: Graphene Composites Produced by Powder Metallurgical Method

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Titel: Fracture Behavior of GTD-111 Superalloy during In Situ Tensile Scanning Electron Microscopy
verfasst von: Yinwei Wang
Pengchao Zhang
Morteza Taheri
Behzad Babaei
Publikationsdatum: 18.05.2022
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 12/2022
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-022-07003-z

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