Crack propagation under bending in cast MglOGdxNd-T4 alloys
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Crack propagation under bending in cast MglOGdxNd-T4 alloys. / Maier, Petra; Mendis, Chamini; Wolff, Martin et al.
Magnesium Technology 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition. The Minerals, Metals & Materials Society, 2014. p. 77-82 (Magnesium Technology).Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - Crack propagation under bending in cast MglOGdxNd-T4 alloys
AU - Maier, Petra
AU - Mendis, Chamini
AU - Wolff, Martin
AU - Hort, Norbert
N1 - Conference code: 143
PY - 2014
Y1 - 2014
N2 - Mg-alloys containing RE additions are promising candidates for structural applications, as they combine low density with high strength, which is important for lightweight construction. Medical applications, like bone screws and nails, benefit from their moderate corrosion rate. All these components are exposed to bending, more or less influenced by corrosion. In this study the Mg-lOGd-xNd (x=0,l,2 wt.%) were subjected to solution heat treatment to increase ductility and to reduce the dendritic microstructure. Plates of 110×20×6 mm3 in size were tested by three-point bending with a deformation speed of 1 mm/min. Crack growth is discussed using light microscopy and correlated to bending stress - outer strain curves. Crack propagation is mostly found transgranular and interacts with twinning. Double and secondary twinning occurs near the crack path in appropriately oriented grains. Corroded samples after pre-bending show an increase in yield strength but reduced toughness. Cracked samples show a strong reduction in flexural strength after corrosion.
AB - Mg-alloys containing RE additions are promising candidates for structural applications, as they combine low density with high strength, which is important for lightweight construction. Medical applications, like bone screws and nails, benefit from their moderate corrosion rate. All these components are exposed to bending, more or less influenced by corrosion. In this study the Mg-lOGd-xNd (x=0,l,2 wt.%) were subjected to solution heat treatment to increase ductility and to reduce the dendritic microstructure. Plates of 110×20×6 mm3 in size were tested by three-point bending with a deformation speed of 1 mm/min. Crack growth is discussed using light microscopy and correlated to bending stress - outer strain curves. Crack propagation is mostly found transgranular and interacts with twinning. Double and secondary twinning occurs near the crack path in appropriately oriented grains. Corroded samples after pre-bending show an increase in yield strength but reduced toughness. Cracked samples show a strong reduction in flexural strength after corrosion.
KW - Bending
KW - Corrosion
KW - Crack growth
KW - Mg-RE
KW - Twinning
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=84899818283&partnerID=8YFLogxK
M3 - Article in conference proceedings
AN - SCOPUS:84899818283
SN - 9781118888162
T3 - Magnesium Technology
SP - 77
EP - 82
BT - Magnesium Technology 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition
PB - The Minerals, Metals & Materials Society
T2 - 143rd Annual Meeting and Exhibition of Magnesium Technology 2014 - TMS 2014
Y2 - 16 February 2014 through 20 February 2014
ER -