Abstract
The effect of a minor change in alloy composition on the microstructure and corrosion properties of melt spun Mg98.3-xZnxY 1.7 ribbons with x=9-12 is studied by X-ray diffractometry, differential scanning calorimetry, transmission electron microscopy and a dynamic polarization test. The ribbon specimens with x=9-10 revealed an in-situ composite microstructure consisting of icosahedral quasicrystalline phase (I-phase) particles distributed in an α-Mg matrix. The ribbon specimens with x=11 and 12 contained a minor MgZn2 phase together with an α-Mg phase and I-phase. With increasing Zn content, the corrosion potential increased because of a mixed potential effect, but the formation of a MgZn2 phase deteriorated the corrosion property through preferential attack, causing an irregular boundary between the corrosion product and the substrate. These results indicate that it is important to control alloy chemistry not to form the MgZn2 phase in developing an I-phase strengthened Mg-Zn-Y alloy for structural applications.
| Original language | English |
|---|---|
| Pages (from-to) | 205-209 |
| Number of pages | 5 |
| Journal | Metals and Materials International |
| Volume | 19 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2013 Mar 1 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry
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Microstructure and corrosion behavior of rapidly solidified Mg-Zn-Y alloys. / Nam, S. W.; Kim, W. T.; Kim, Do Hyang; Kim, T. S.
In: Metals and Materials International, Vol. 19, No. 2, 01.03.2013, p. 205-209.Research output: Contribution to journal › Article
TY - JOUR
T1 - Microstructure and corrosion behavior of rapidly solidified Mg-Zn-Y alloys
AU - Nam, S. W.
AU - Kim, W. T.
AU - Kim, Do Hyang
AU - Kim, T. S.
PY - 2013/3/1
Y1 - 2013/3/1
N2 - The effect of a minor change in alloy composition on the microstructure and corrosion properties of melt spun Mg98.3-xZnxY 1.7 ribbons with x=9-12 is studied by X-ray diffractometry, differential scanning calorimetry, transmission electron microscopy and a dynamic polarization test. The ribbon specimens with x=9-10 revealed an in-situ composite microstructure consisting of icosahedral quasicrystalline phase (I-phase) particles distributed in an α-Mg matrix. The ribbon specimens with x=11 and 12 contained a minor MgZn2 phase together with an α-Mg phase and I-phase. With increasing Zn content, the corrosion potential increased because of a mixed potential effect, but the formation of a MgZn2 phase deteriorated the corrosion property through preferential attack, causing an irregular boundary between the corrosion product and the substrate. These results indicate that it is important to control alloy chemistry not to form the MgZn2 phase in developing an I-phase strengthened Mg-Zn-Y alloy for structural applications.
AB - The effect of a minor change in alloy composition on the microstructure and corrosion properties of melt spun Mg98.3-xZnxY 1.7 ribbons with x=9-12 is studied by X-ray diffractometry, differential scanning calorimetry, transmission electron microscopy and a dynamic polarization test. The ribbon specimens with x=9-10 revealed an in-situ composite microstructure consisting of icosahedral quasicrystalline phase (I-phase) particles distributed in an α-Mg matrix. The ribbon specimens with x=11 and 12 contained a minor MgZn2 phase together with an α-Mg phase and I-phase. With increasing Zn content, the corrosion potential increased because of a mixed potential effect, but the formation of a MgZn2 phase deteriorated the corrosion property through preferential attack, causing an irregular boundary between the corrosion product and the substrate. These results indicate that it is important to control alloy chemistry not to form the MgZn2 phase in developing an I-phase strengthened Mg-Zn-Y alloy for structural applications.
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U2 - 10.1007/s12540-013-2010-5
DO - 10.1007/s12540-013-2010-5
M3 - Article
VL - 19
SP - 205
EP - 209
JO - Metals and Materials International
JF - Metals and Materials International
SN - 1598-9623
IS - 2
ER -