Microstructure and Fracture Toughness of an Extruded Mg-Dy-Nd-Zn-Zr Alloy Influenced by Heat Treatment
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Microstructure and Fracture Toughness of an Extruded Mg-Dy-Nd-Zn-Zr Alloy Influenced by Heat Treatment. / Maier, Petra; Clausius, Benjamin; Joy, Charis et al.
Magnesium Technology 2021. ed. / Victoria M. Miller; Petra Maier; J. Brian Jordon; Neale R. Neelameggham. Cham : Springer Science and Business Media Deutschland GmbH, 2021. p. 19-26 (Minerals, Metals and Materials Series).Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - Microstructure and Fracture Toughness of an Extruded Mg-Dy-Nd-Zn-Zr Alloy Influenced by Heat Treatment
AU - Maier, Petra
AU - Clausius, Benjamin
AU - Joy, Charis
AU - Menze, Roman
AU - Bittner, Benjamin
AU - Hort, Norbert
N1 - Conference code: 150
PY - 2021
Y1 - 2021
N2 - The influence of microstructural changes induced by heat treatment on fracture toughness is investigated for a resorbable Mg-Dy based alloy. The initial hot-extruded condition is a fine-grained Resoloy® (Mg–Dy–Nd–Zn–Zr) alloy consisting of lamellar LPSO structures within the matrix. Solution heat treatment causes grain growth and the formation of blocky LPSO phases. The amount of the lamellar LPSO structures reduces. Quasi-static C-ring tests with and without Ringer solution were used to evaluate force–displacement curves and their fracture energy. The coarser-grained alloys tend to twin under plastic deformation, which is influencing the crack propagation. Blocky LPSO phases clearly hinder crack growth. The fine-grained extruded condition shows the highest force and displacement values to induce the crack, the solution heat-treated microstructure consisting of a good balance of grain size, matrix, and blocky LPSO phases and twins show highest fracture energy. Even if there might be an absorption of hydrogen, the ductility under stress corrosion is high.
AB - The influence of microstructural changes induced by heat treatment on fracture toughness is investigated for a resorbable Mg-Dy based alloy. The initial hot-extruded condition is a fine-grained Resoloy® (Mg–Dy–Nd–Zn–Zr) alloy consisting of lamellar LPSO structures within the matrix. Solution heat treatment causes grain growth and the formation of blocky LPSO phases. The amount of the lamellar LPSO structures reduces. Quasi-static C-ring tests with and without Ringer solution were used to evaluate force–displacement curves and their fracture energy. The coarser-grained alloys tend to twin under plastic deformation, which is influencing the crack propagation. Blocky LPSO phases clearly hinder crack growth. The fine-grained extruded condition shows the highest force and displacement values to induce the crack, the solution heat-treated microstructure consisting of a good balance of grain size, matrix, and blocky LPSO phases and twins show highest fracture energy. Even if there might be an absorption of hydrogen, the ductility under stress corrosion is high.
KW - Crack propagation
KW - Fracture toughness
KW - LPSO phases
KW - Magnesium
KW - RESOLOY®
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85102752839&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-65528-0_4
DO - 10.1007/978-3-030-65528-0_4
M3 - Article in conference proceedings
AN - SCOPUS:85102752839
SN - 978-3-030-65527-3
T3 - Minerals, Metals and Materials Series
SP - 19
EP - 26
BT - Magnesium Technology 2021
A2 - Miller, Victoria M.
A2 - Maier, Petra
A2 - Jordon, J. Brian
A2 - Neelameggham, Neale R.
PB - Springer Science and Business Media Deutschland GmbH
CY - Cham
T2 - Magnesium Technology Symposium held at the 150th TMS Annual Meeting and Exhibition - TMS 2021
Y2 - 15 March 2021 through 18 March 2021
ER -