Effect of Trace Additions of Ag on Precipitation in Al–Mg Alloys
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- Kubota Masahiro
- School of Physics and Materials Engineering, P. O. Box 69M, Monash University
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- Muddle Barry C.
- School of Physics and Materials Engineering, P. O. Box 69M, Monash University
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- タイトル別名
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- Effect of Trace Additions of Ag on Precipitation in Al–Mg Alloys
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Effect of Ag additions on the precipitate microstructures of the Al–10Mg alloys has been investigated using transmission electron microscopy (TEM) and electron diffraction.<BR>In the Al–10Mg alloy aged at 240°C, age-hardening response is attributable initially to an array of coarse-scale, sparsely distributed rod-like and/or plate-like β′ precipitate (particles). At the maximum hardness, the microstructure contained an increased volume fraction of coarse-scale β′ and β precipitate particles. In a well over-aged condition, the microstructure exhibited very coarse-scale β precipitate particles. However, in the Al–10Mg–0.5Ag alloy aged at 240°C, fine-scale and uniformly distributed icosahedral quasicrystalline precipitates were observed in the early stages of ageing, and it was to be replaced by the metastable crystalline T phase after the alloy is aged for 2 h at 240°C. The T phase formed as faceted rods parallel to ⟨110⟩α directions appeared to be the primary strengthening constitute exhibiting maximum hardness. The globular β precipitate particles were observed to be replaced by the metastable rod-like T precipitate particles after the alloy was aged 72 h at 240°C, and the β phase is confirmed to be the equilibrium constitute phase in the over-aged ternary Al–10Mg–0.5Ag alloy.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 46 (12), 2968-2974, 2005
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679227200768
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- NII論文ID
- 130004452739
- 10017150575
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 7758128
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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