TY - JOUR
T1 - Origin of the influence of Cu or Ag micro-additions on the age hardening behavior of ultrafine-grained Al-Mg-Si alloys
AU - Sauvage, Xavier
AU - Lee, Seungwon
AU - Matsuda, Kenji
AU - Horita, Zenji
N1 - Funding Information:
The authors would like to thank the Agence Nationale de la Recherche (ANR) for financial support (PRASA project - ANR-15-CE08-0029). This work was also supported in part by Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand ?Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials?, in part by the Light Metals Educational Foundation of Japan, and in part by a Grant-in-Aid from the MEXT, Japan, for Scientific Research (S) (No.26220909). The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - The age hardening behavior of ultrafine-grained Al-Mg-Si alloys with micro-additions of Cu and Ag has been investigated with a special emphasis on the relationship between microstructural features and hardness evolutions. Using transmission electron microscopy, it is shown that the higher hardness and thermal stability induced by a small amount of Cu is due to clustering during grain refinement by severe plastic deformation. It is also demonstrated that the addition of Ag is beneficial for the thermal stability of the ultrafine grain structure as it segregates along grain boundaries and significantly reduces their mobility.
AB - The age hardening behavior of ultrafine-grained Al-Mg-Si alloys with micro-additions of Cu and Ag has been investigated with a special emphasis on the relationship between microstructural features and hardness evolutions. Using transmission electron microscopy, it is shown that the higher hardness and thermal stability induced by a small amount of Cu is due to clustering during grain refinement by severe plastic deformation. It is also demonstrated that the addition of Ag is beneficial for the thermal stability of the ultrafine grain structure as it segregates along grain boundaries and significantly reduces their mobility.
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U2 - 10.1016/j.jallcom.2017.03.250
DO - 10.1016/j.jallcom.2017.03.250
M3 - Article
AN - SCOPUS:85015990338
VL - 710
SP - 199
EP - 204
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -