Influence of excess si on the morphology and thermal stability of metastable precipitates formed in an Al-Mg-Si alloy

被引：2
作者：
Fukui, Koichiro [1 ]
Takeda, Mahoto [1 ]
Endo, Takao [1 ]
机构：
[1] Yokohama Natl Univ, Dept Mat Engn, Fac Engn, Yokohama, Kanagawa 2408501, Japan
来源：
JOURNAL OF THE JAPAN INSTITUTE OF METALS | 2006年 / 70卷 / 08期
关键词：
aluminium-magnesium-silicon alloy; electron microscopy; hardness; differential scanning calorimetry; morphology of precipitates;
D O I：
10.2320/jinstmet.70.715
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of excess Si on the precipitation behaviour in an Al-Mg-Si alloy was studied by means of Vickers microhardness tests, high-resolution transmission electron microscopy (HRTEM) and differential scanning calorimetry (DSC). The metastable-phase precipitates formed during isothermal ageing up to the time to peak hardness were investigated from the viewpoints of the morphology, the density of precipitates and the change in the exothermic heat caused by the formation of precipitates in the DSC measurements. The changes in the density of precipitates and the exothermic heat with excess Si at peak ageing time showed a similar tendency to that of the peak hardness curves. Before the formation of the beta', three exothermic peaks of the metastable-phase precipitates appeared in the DSC curves of the alloy specimens isothermally aged for a short time. It was revealed that the formation of precipitates, which were named as Type-1, -2 and -3 in this work, corresponded to the three exothermic peaks.
引用
收藏
页码：715 / 719
页数：5
相关论文
共 50 条
  • [1] Influence of excess Si on the morphology and thermal stability of metastable precipitates formed in an Al-Mg-Si alloy
    Fukui, K
    Takeda, M
    Endo, T
    MATERIALS TRANSACTIONS, 2005, 46 (04) : 880 - 884
  • [2] Morphology and thermal stability of Al-Mg-Si ternary alloy metastable precipitates formed in an aged at 403 K to 483 K
    Fukui, K
    Takeda, M
    Endo, T
    MATERIALS LETTERS, 2005, 59 (11) : 1444 - 1448
  • [3] The effect of cold deformation on the kinetics of the β″ precipitates in an Al-Mg-Si alloy
    Reza S. Yassar
    David P. Field
    Hasso Weiland
    Metallurgical and Materials Transactions A, 2005, 36 : 2059 - 2065
  • [4] On the effect of precipitates on the cyclic deformation behavior of an Al-Mg-Si alloy
    Jiang, Haichun
    Sandloebes, Stefanie
    Gottstein, Gunter
    Korte-Kerzel, Sandra
    JOURNAL OF MATERIALS RESEARCH, 2017, 32 (23) : 4398 - 4410
  • [5] Thermal Analysis of the Mechanism and Kinetics Parameters of the Metastable Phases Precipitation in the Al-Mg-Si Alloy
    Guessoum, M.
    Raho, A. A.
    Ouali, N.
    Trari, M.
    INTERNATIONAL JOURNAL OF ENGINEERING RESEARCH IN AFRICA, 2022, 61 : 17 - 27
  • [6] Over-ageing of an Al-Mg-Si alloy with silicon excess
    Meyruey, G.
    Massardier, V
    Lefebvre, W.
    Perez, M.
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2018, 730 : 92 - 105
  • [7] Stability of metastable phases and microstructures in the ageing process of Al-Mg-Si ternary alloys
    Takeda, M
    Ohkubo, F
    Shirai, T
    Fukui, K
    JOURNAL OF MATERIALS SCIENCE, 1998, 33 (09) : 2385 - 2390
  • [8] Morphology and crystallography of β-Mg2Si precipitation in Al-Mg-Si alloys
    Ohmori, Y
    Doan, LC
    Matsuura, Y
    Kobayashi, S
    Nakai, K
    MATERIALS TRANSACTIONS, 2001, 42 (12) : 2576 - 2583
  • [9] PRECIPITATION SEQUENCE OF AN AGED Al-Mg-Si ALLOY
    Fang, X.
    Song, M.
    Li, K.
    Du, Y.
    JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY, 2010, 46 (02) : 171 - 180
  • [10] Comparison of precipitates between excess Si-type and balanced-type Al-Mg-Si alloys during continuous heating
    Kenji Matsuda
    Susumu Ikeno
    Kiyoshi Terayama
    Hiroaki Matsui
    Tatsuo Sato
    Yasuhiro Uetani
    Metallurgical and Materials Transactions A, 2005, 36 : 2007 - 2012
12345