書誌事項
- タイトル別名
-
- Microstructures and aging characteristics of Al-Mg-Sc alloy fabricated by selective laser melting
- レーザ セキソウ ゾウケイホウ ニ ヨリ サクセイ シタ Al-Mg-Sc ゴウキン ノ ソシキ ト ジコウ トクセイ
この論文をさがす
説明
<p>We investigated the processability and aging characteristics of a selective laser melted (SLM) Al-Mg-Sc alloy. The Al-Mg-Sc SLM specimens were densified with increasing volume energy density in the SLM process. The Al-MgSc SLM specimen, fabricated under the optimum laser scan conditions for densification, had a relative density of more than 99.9%. The Vickers hardness significantly increased by aging heat treatment, and the peak-aging condition was found at 325°C for 4 h. Meanwhile, the hardness could be maintained even after prolonged aging, that is, robust aging behavior was confirmed for aging time. Both the as-fabricated and peak-aged Al-Mg-Sc SLM specimens showed mixed crystal grain microstructures with equiaxed and columnar crystals. The nanostructure of the peak-aged Al-Mg-Sc SLM specimen was dispersed single-nano-sized Al3Sc precipitates in the α-Al matrix, which were generated by aging of the as-fabricated SLM specimen supersaturated with solid solution Sc. In the peak-aged Al-Mg-Sc SLM specimen, both the tensile strength and 0.2% proof stress significantly increased to 550 MPa and 500 MPa, respectively, equivalent to those of the heat-treated conventional extra-super duralumin. This strengthening was mainly attributed to precipitation hardening of the finely precipitated Al3Sc phase (L12-type), coherent with the α-Al matrix.</p>
収録刊行物
-
- 軽金属
-
軽金属 70 (10), 467-474, 2020-10-15
一般社団法人 軽金属学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1391412326419361792
-
- NII論文ID
- 130007939836
-
- NII書誌ID
- AN00069773
-
- ISSN
- 18808018
- 04515994
-
- NDL書誌ID
- 030690219
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDLサーチ
- Crossref
- CiNii Articles
- OpenAIRE
-
- 抄録ライセンスフラグ
- 使用不可
