Temperature dependence of impact deformation behavior of single crystal Ni based superalloy

Autor:	Yongmin Yang, J.J. Yu, X.F. Sun, H.R. Guan, Jin Tingting
Rok vydání:	2015
Předmět:	Materials science Mechanical Engineering Metallurgy Work hardening Condensed Matter Physics Superalloy Brittleness Deformation mechanism Mechanics of Materials Ultimate tensile strength General Materials Science Deformation (engineering) Dislocation Composite material Single crystal
Zdroj:	Materials Science and Technology. 31:1860-1866
ISSN:	1743-2847 0267-0836
DOI:	10.1179/1743284715y.0000000037
Popis:	The impact test was carried out to investigate the intermediate temperature brittleness of single crystal Ni based superalloy. The samples were impacted at the velocity of ∼5 m s− 1. The results showed that the impact toughness also exhibited intermediate temperature brittleness, which is similar to the situation in tensile. The samples showed the highest impact toughness at 600°C but exhibited the lowest impact toughness at 760°C. Results showed that the variety of impact toughness was due to the deformation mechanism. At 600°C, a/2 dislocation slips on the {111} slip system were attributed to the high impact toughness; however, a/2 dislocation slips from octahedral {111} planes to cubic {100} planes resulted in significant work hardening, leading to the decrease of impact toughness.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::687f91ccad54118be853a8c1d44b2788 https://doi.org/10.1179/1743284715y.0000000037 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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