Effect of deformation on precipitation in Al-Mg2Si alloys containing silicon in excess.

• MATSUDA Kenji

  Faculty of Engineering, Toyama University

• IWASHITA Tsunaki

  Undergraduate student, Toyama University

• ISURUGI Masakazu

  Hokuriku Fabrication Center, Shin-Nikkei Co. Ltd.

• RENGAKUJI Seichi

  Faculty of Engineering, Toyama University

• UETANI Yasuhiro

  Research Institute of Technology, Toyama Prefectural University

• IKENO Susumu

  Faculty of Engineering, Toyama University

Bibliographic Information

Other Title

• 過剰Ｓｉ量の異なるＡｌ‐Ｍｇ２Ｓｉ合金の時効析出に及ぼす加工の影響
• 過剰Si量の異なるAl-Mg2Si合金の時効析出に及ぼす加工の影響
• カジョウ Siリョウ ノ コトナル Al Mg2Si ゴウキン ノ ジコウ セ

Abstract

The aging behavior of 17 kinds of Al–Mg₂Si alloys containing various amount of Si in excess deformed after solution heated were investigated by micro-Vickers hardness, electrical resistivity and transmission electron microscopy (TEM). In Al–0.4 mass%Mg₂Si alloys containing various amounts of Si in excess, the aging after deformation causes increased maximum hardness (H_max) for all specimens. The age-hardenability (ΔH) of specimens increases by the deformation of 1% and becomes decreased by further deformation. The aging time to reach maximum hardness, t_max, becomes shortened by the deformation. The distribution and size of precipitates in the deformed specimens are denser and finer than those in specimens without any deformation. In Al–0.6 mass%Mg₂Si alloys containing Si up to 0.1 mass% in excess, the aging after deformation causes increased H_max and ΔH. While, in Al–0.6 mass%Mg₂Si alloys containing Si of 0.2 to 0.4 mass% in excess, the values of H_max remain constant with increasing amount of deformation and the values of ΔH decrease with increasing deformation over 5%. In Al–0.8 mass%Mg₂Si and Al–1.0 mass%Mg₂Si alloys containing Si in excess, the deformation prior to aging has no effect on H_max, ΔH and t_max. The precipitates are finer in the alloys which exibit increased ΔH by a small amount of deformation than those of the undeformed alloys. On the contrary, the precipitates are coarsened in the alloys with decreased ΔH by deformation. A small amount of deformation causes decreased values of ΔH at 473 K and increased ΔH at 523 K in the Al–0.6 mass%Mg₂Si–0.4 mass%Si alloy. In the Al–0.4 mass%Mg₂Si–0.4 mass%Si alloy, however, a small amount of deformation causes increased ΔH at 473 K and decreased ΔH at 423 K.

Journal

• Journal of Japan Institute of Light Metals

  Journal of Japan Institute of Light Metals 47 (7), 385-390, 1997

  The Japan Institute of Light Metals

Keywords

• Al–Mg-Si alloys
• excess silicon
• age-hardening
• thermo-mechanical treatment
• transmission electron microscope

Details

• CRID: 1390001206338141696
• NII Article ID: 10003795698
• NII Article ID: 10004011483
• NII Book ID: AN00069773
• DOI: 10.2464/jilm.47.385
• ISSN: 18808018
• ISSN: 04515994
• ISSN: http://id.crossref.org/issn/04515994
• NDL BIB ID: 4258125
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4258125
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed