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Matsuda, Kenji; Sakaguchi, Yoshihiko; Miyata, Yukimasa; Uetani, Yasuhiro; Sato, Tatsuo; Kamio, Akihiko; Ikeno, Susumu

doi:10.1023/a:1004769305736

Cited by 247 publications

(96 citation statements)

References 6 publications

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“…5,6) There are no reports that precipitates in the Al-Mg-Si alloys including Cu and Cr were observed by high-resolution transmission electron microscopy (HRTEM), and were classified into kinds of precipitates based on characteristics of their HRTEM images. We have reported the precipitation sequence of Al-Mg-Si alloys without Cu and Cr by HRTEM, 7,8) and recently reported the Q -phase in the Al-Mg-Si-Cu alloy. 9) We have also reported on the effect of transition metals of Cr and Fe (TM) and Cu on the agehardening behavior of the Al-1.1 mass%Mg 2 Si-X mass%Si alloys (X = 0, 0.34) aged at 423 K.…”

Section: Introductionmentioning

confidence: 93%

“…In our recent studies, the Si-content affects kinds of precipitates formed in Al-Mg-Si alloys. 8,9) Figure 6 shows HRTEM images of alloys. There is a cross-section of the rod-shaped precipitate perpendicular to its longitudinal direction in {200} lattice fringes of 0.203 nm shown in each image.…”

Section: Hrtem Observation 321 Tm-free Alloysmentioning

confidence: 99%

“…The precipitation sequence for the excess-Si and Cu-bearing alloys differ from that of the balanced alloy as follows: 8) [ [Cu-bearing alloy]…”

Section: Hrtem Observation 321 Tm-free Alloysmentioning

confidence: 99%

“…Several new metastable phases have been found out by HRTEM. 8,9) In this study, metastable phases in Al-Mg-Si alloys at 523 K containing Cu and TM are observed by HRTEM, and the kinds of precipitates are classified in order to investigate the effects of the addition of these minor elements and examine the validity of the precipitation mechanisms previously suggested by the authors.…”

Section: Introductionmentioning

confidence: 99%

“…8,9) 523 K is a suitable temperature to classify each metastable phase, because precipitates are large, have the periodic structures in contrast to precipitates in alloys aged below 473 K, and are shown in clear HRTEM images. Several new metastable phases have been found out by HRTEM.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Cu and Transition Metals on the Precipitation Behaviors of Metastable Phases at 523 K in Al-Mg-Si Alloys

et al. 2002

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Morphology and crystal lattice of precipitates formed in the 6000 series Al-Mg-Si alloys containing Cu and transition metals of Cr and Fe (TM) after aging at 523 K were investigated by high-resolution transmission microscopy (HRTEM). The precipitates in the Cu-bearing alloys are more finely and densely distributed than those in the Cu-free alloys, whereas those in the TM-bearing alloys were coarser and formed inhomogeneously at the interfaces between the dispersoids and the matrix. Three kinds of metastable phases were detected by HRTEM as follows: β -phase in the balanced alloy, the TYPE-B precipitate in the excess-Si alloy, and Q -phase in the Cu-bearing alloys. No significant difference in between the precipitates in the TM-free alloys and in the TM-bearing alloys was observed. However, the Type-B precipitate in the excess-Si alloy was replaced with the β -phase by the addition of TM. This suggests that the chemical composition of the excess-Si alloy changes to the balanced composition, because the excess Si in the matrix has been consumed by the formation of the AlSi(Fe, Cr) and AlSiFe dispersoids.

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Section: Introductionmentioning

confidence: 93%

Section: Hrtem Observation 321 Tm-free Alloysmentioning

confidence: 99%

“…The precipitation sequence for the excess-Si and Cu-bearing alloys differ from that of the balanced alloy as follows: 8) [ [Cu-bearing alloy]…”

Section: Hrtem Observation 321 Tm-free Alloysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Cu and Transition Metals on the Precipitation Behaviors of Metastable Phases at 523 K in Al-Mg-Si Alloys

et al. 2002

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Effects of Microalloying Elements (Cu, Ag) on Nanocluster Formation and Age‐Hardening Behavior in Al‐Mg‐Si Alloys

Kim¹,

Marioara²,

Holmestad³

et al. 2012

ICAA13: 13th International Conference on Aluminum Alloys

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Atomic Structures of Precipitates in Al–Mg–Si Alloys with Small Additions of Other Elements

et al. 2018

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In Al–Mg–Si alloys, additions of only a few weight percent of Mg and Si enable formation of hardening precipitates during heat treatment. The precipitation is complex and is influenced by chemical compositions and thermo‐mechanical treatment. Structural analysis at the atomic scale has played an important role for understanding the Al–Mg–Si system. This review paper gives a summary of the influence of elements on the precipitate structures of Al–Mg–Si alloys at the atomic scale. The structures are modified by small additions of different elements, but all the encountered precipitates are structurally connected with the Si network, except for the main hardening phase which exhibit a partially discontinuous Si network. The influence of the selected elements (Li, Cu, Zn, Ge, Ag, Ni, Co, and Au) is discussed in detail.

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Cited by 247 publications

References 6 publications

Effects of Cu and Transition Metals on the Precipitation Behaviors of Metastable Phases at 523 K in Al-Mg-Si Alloys

Effects of Cu and Transition Metals on the Precipitation Behaviors of Metastable Phases at 523 K in Al-Mg-Si Alloys

Effects of Microalloying Elements (Cu, Ag) on Nanocluster Formation and Age‐Hardening Behavior in Al‐Mg‐Si Alloys

Atomic Structures of Precipitates in Al–Mg–Si Alloys with Small Additions of Other Elements

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