Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature

Michiaki Yamasaki; Minami Sasaki; Masahiko Nishijima; Kenji Hiraga; Yoshihito Kawamura

doi:10.1016/j.actamat.2007.08.033

Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature

Michiaki Yamasaki, Minami Sasaki, Masahiko Nishijima, Kenji Hiraga, Yoshihito Kawamura

Research output: Contribution to journal › Article › peer-review

429 Citations (Scopus)

Abstract

This paper proposes a time-temperature-transformation diagram of an Mg-Zn-Gd alloy. An Mg₉₇Zn₁Gd₂ (at.%) alloy shows different precipitation sequences at low, medium and high temperatures. Low-temperature aging at <523 K brings about coherent β′-phase precipitation to a α-Mg solid solution, resulting in increase in strength of the alloys. However, aging at medium and high temperatures >623 K led to strengthening of the Mg-Zn-Gd alloy, owing to the formation of profuse stacking faults and 14H long period stacking ordered structure from the supersaturated α-Mg matrix, respectively.

Original language	English
Pages (from-to)	6798-6805
Number of pages	8
Journal	Acta Materialia
Volume	55
Issue number	20
DOIs	https://doi.org/10.1016/j.actamat.2007.08.033
Publication status	Published - 2007 Dec
Externally published	Yes

Keywords

Long period stacking ordered structure
Magnesium
Mg-Zn-Gd
Precipitation
β′-phase

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2007.08.033

Cite this

@article{bdca1cf898c54cc4a4e03e0be88f9d38,

title = "Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature",

abstract = "This paper proposes a time-temperature-transformation diagram of an Mg-Zn-Gd alloy. An Mg97Zn1Gd2 (at.%) alloy shows different precipitation sequences at low, medium and high temperatures. Low-temperature aging at <523 K brings about coherent β′-phase precipitation to a α-Mg solid solution, resulting in increase in strength of the alloys. However, aging at medium and high temperatures >623 K led to strengthening of the Mg-Zn-Gd alloy, owing to the formation of profuse stacking faults and 14H long period stacking ordered structure from the supersaturated α-Mg matrix, respectively.",

keywords = "Long period stacking ordered structure, Magnesium, Mg-Zn-Gd, Precipitation, β′-phase",

author = "Michiaki Yamasaki and Minami Sasaki and Masahiko Nishijima and Kenji Hiraga and Yoshihito Kawamura",

note = "Funding Information: This work was financially supported by Grant-in-Aid for Scientific Research (A) from the Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT). The microstructure observations were partly supported by the {\textquoteleft}Nanotechnology Support Project (Subject No. 018004, Institute for Materials Research, Tohoku University){\textquoteright} of MEXT.",

year = "2007",

month = dec,

doi = "10.1016/j.actamat.2007.08.033",

language = "English",

volume = "55",

pages = "6798--6805",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier Limited",

number = "20",

}

TY - JOUR

T1 - Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature

AU - Yamasaki, Michiaki

AU - Sasaki, Minami

AU - Nishijima, Masahiko

AU - Hiraga, Kenji

AU - Kawamura, Yoshihito

N1 - Funding Information: This work was financially supported by Grant-in-Aid for Scientific Research (A) from the Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT). The microstructure observations were partly supported by the ‘Nanotechnology Support Project (Subject No. 018004, Institute for Materials Research, Tohoku University)’ of MEXT.

PY - 2007/12

Y1 - 2007/12

N2 - This paper proposes a time-temperature-transformation diagram of an Mg-Zn-Gd alloy. An Mg97Zn1Gd2 (at.%) alloy shows different precipitation sequences at low, medium and high temperatures. Low-temperature aging at <523 K brings about coherent β′-phase precipitation to a α-Mg solid solution, resulting in increase in strength of the alloys. However, aging at medium and high temperatures >623 K led to strengthening of the Mg-Zn-Gd alloy, owing to the formation of profuse stacking faults and 14H long period stacking ordered structure from the supersaturated α-Mg matrix, respectively.

AB - This paper proposes a time-temperature-transformation diagram of an Mg-Zn-Gd alloy. An Mg97Zn1Gd2 (at.%) alloy shows different precipitation sequences at low, medium and high temperatures. Low-temperature aging at <523 K brings about coherent β′-phase precipitation to a α-Mg solid solution, resulting in increase in strength of the alloys. However, aging at medium and high temperatures >623 K led to strengthening of the Mg-Zn-Gd alloy, owing to the formation of profuse stacking faults and 14H long period stacking ordered structure from the supersaturated α-Mg matrix, respectively.

KW - Long period stacking ordered structure

KW - Magnesium

KW - Mg-Zn-Gd

KW - Precipitation

KW - β′-phase

UR - http://www.scopus.com/inward/record.url?scp=35748937620&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35748937620&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2007.08.033

DO - 10.1016/j.actamat.2007.08.033

M3 - Article

AN - SCOPUS:35748937620

SN - 1359-6454

VL - 55

SP - 6798

EP - 6805

JO - Acta Materialia

JF - Acta Materialia

IS - 20

ER -

Formation of 14H long period stacking ordered structure and profuse stacking faults in Mg-Zn-Gd alloys during isothermal aging at high temperature

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this