TY - JOUR
T1 - Clustering and Vacancy Behavior in High- and Low-Solute Al-Mg-Si Alloys
AU - Wenner, Sigurd
AU - Nishimura, Katsuhiko
AU - Matsuda, Kenji
AU - Matsuzaki, Teiichiro
AU - Tomono, Dai
AU - Pratt, Francis L.
AU - Marioara, Calin D.
AU - Holmestad, Randi
N1 - Publisher Copyright:
© 2014, The Minerals, Metals & Materials Society and ASM International.
PY - 2014/11
Y1 - 2014/11
N2 - The precipitate microstructure and vacancy distribution in Al-Mg-Si alloys with different amounts of solute and different heat treatments were investigated by transmission electron microscopy and muon spin relaxation measurements. A high amount of vacancies is normally present in Al-Mg-Si alloys as these bind to atomic clusters. We observe these vacancies to leave the material not before over-aging at very high temperatures such as 623 K (350 °C), meaning that vacancies do not bind to incoherent over-aged precipitates. For samples only stored at room temperature after solution heat treatment, a reduction of muon trapping was found at a temperature of 140 K (−133 °C) when reducing the amount of solute in the alloy. This might be connected to a lower number density of Cluster (1), which contrary to Cluster (2) do not nucleate precipitates upon further aging of the material.
AB - The precipitate microstructure and vacancy distribution in Al-Mg-Si alloys with different amounts of solute and different heat treatments were investigated by transmission electron microscopy and muon spin relaxation measurements. A high amount of vacancies is normally present in Al-Mg-Si alloys as these bind to atomic clusters. We observe these vacancies to leave the material not before over-aging at very high temperatures such as 623 K (350 °C), meaning that vacancies do not bind to incoherent over-aged precipitates. For samples only stored at room temperature after solution heat treatment, a reduction of muon trapping was found at a temperature of 140 K (−133 °C) when reducing the amount of solute in the alloy. This might be connected to a lower number density of Cluster (1), which contrary to Cluster (2) do not nucleate precipitates upon further aging of the material.
UR - http://www.scopus.com/inward/record.url?scp=85027943504&partnerID=8YFLogxK
U2 - 10.1007/s11661-014-2527-3
DO - 10.1007/s11661-014-2527-3
M3 - 学術論文
AN - SCOPUS:85027943504
SN - 1073-5623
VL - 45
SP - 5777
EP - 5781
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 12
ER -