Precipitation in a Mg–10Gd–3Y–0.4 Zr (wt.%) alloy during isothermal ageing at 250 C
SM He, XQ Zeng, LM Peng, X Gao, JF Nie… - Journal of Alloys and …, 2006 - Elsevier
SM He, XQ Zeng, LM Peng, X Gao, JF Nie, WJ Ding
Journal of Alloys and Compounds, 2006•ElsevierThe precipitation sequence in a Mg–10Gd–3Y–0.4 Zr (wt.%) alloy during isothermal ageing
at 250° C has been investigated using transmission electron microscopy. It is found that the
precipitation sequence involves super-saturated solid solution (SSSS)→ β ″(D019)→
β′(cbco)→ β1 (fcc)→ β (fcc), which is similar to that of WE54 alloy but different from
previously reported three-stage sequence: SSSS→ β ″(D019)→ β′(cbco)→ β (bcc). The
metastable β′ phase, which plays an important role for the age hardening of the alloy, has …
at 250° C has been investigated using transmission electron microscopy. It is found that the
precipitation sequence involves super-saturated solid solution (SSSS)→ β ″(D019)→
β′(cbco)→ β1 (fcc)→ β (fcc), which is similar to that of WE54 alloy but different from
previously reported three-stage sequence: SSSS→ β ″(D019)→ β′(cbco)→ β (bcc). The
metastable β′ phase, which plays an important role for the age hardening of the alloy, has …
The precipitation sequence in a Mg–10Gd–3Y–0.4Zr (wt.%) alloy during isothermal ageing at 250°C has been investigated using transmission electron microscopy. It is found that the precipitation sequence involves super-saturated solid solution (S.S.S.S.)→β″(D019)→β′(cbco)→β1(fcc)→β(fcc), which is similar to that of WE54 alloy but different from previously reported three-stage sequence: S.S.S.S.→β″(D019)→β′(cbco)→β (bcc). The metastable β′ phase, which plays an important role for the age hardening of the alloy, has a shape of convex lens and is very thermally stable at 250°C. Formation of β1 phase appears to take place via an in situ transformation from a decomposed β′ phase.
Elsevier
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