The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

S. K. Son, S. Matsumura, K. Fukui, M. Takeda

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalJournal of Alloys and Compounds
Volume509
Issue number2
DOIs
Publication statusPublished - Jan 12 2011

Fingerprint

Metastable phases
Precipitates
Hardness
Chemical analysis
Needles
Energy dispersive spectroscopy
Calorimetry
Field emission
Microhardness
Metal foil
Thermodynamic stability

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy. / Son, S. K.; Matsumura, S.; Fukui, K.; Takeda, M.

In: Journal of Alloys and Compounds, Vol. 509, No. 2, 12.01.2011, p. 241-245.

Research output: Contribution to journalArticle

@article{0e7dced2db584cb5a3a1dbcf17c2a474,
title = "The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy",
abstract = "The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at{\%}Mg-0.4 at{\%}Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.",
author = "Son, {S. K.} and S. Matsumura and K. Fukui and M. Takeda",
year = "2011",
month = "1",
day = "12",
doi = "10.1016/j.jallcom.2010.08.151",
language = "English",
volume = "509",
pages = "241--245",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier BV",
number = "2",

}

TY - JOUR

T1 - The compositions of metastable phase precipitates observed at peak hardness condition in an Al-Mg-Si alloy

AU - Son, S. K.

AU - Matsumura, S.

AU - Fukui, K.

AU - Takeda, M.

PY - 2011/1/12

Y1 - 2011/1/12

N2 - The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.

AB - The metastable-phase precipitates which appear at the peak condition of hardness in an Al-0.83 at%Mg-0.4 at%Si alloy were investigated, using a combination of Vickers microhardness tests, DSC calorimetry, and field-emission STEM observations with EDX analyses. EDX and elemental mapping revealed that both Si-rich and Mg-Si precipitates with needle-shapes were present. EDX analysis showed that needle-shaped β″precipitates protruding from the specimen foils were composed mainly of Si. The present results on structures, compositions and thermal stabilities of the precipitates suggest that Si-rich precipitates co-exist with complex Mg-Si precipitates also of needle-shape.

UR - http://www.scopus.com/inward/record.url?scp=78149283781&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78149283781&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2010.08.151

DO - 10.1016/j.jallcom.2010.08.151

M3 - Article

AN - SCOPUS:78149283781

VL - 509

SP - 241

EP - 245

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - 2

ER -