A new metastable precipitate phase in Mg–Gd–Y–Zr alloy

H. ZhouNational Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai200240, China;Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA

W.Z. XuDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA

W.W. JianDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA

G.M. ChengDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA

X.L. MaDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA

W. GuoNational Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai200240, China;Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai200240, China

S.N. MathaudhuDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USA;Materials Science Division, US Army Research Office, Research Triangle Park, Durham, NC27709, USA

Q.D. WangNational Engineering Research Center of Light Alloy Net Forming, Shanghai Jiao Tong University, Shanghai200240, China;Key State Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai200240, ChinaCorrespondence[email protected]

Y.T. ZhuDepartment of Materials Science & Engineering, North Carolina State University, Raleigh, NC27695, USACorrespondence[email protected]

show all

Abstract

Mg–RE alloys are among the strongest Mg-based alloys due to their unique precipitation structures. A previously unobserved metastable phase (β_T) is found to coexist with reported β″ and β′ metastable phases under peak ageing conditions in a Mg–Gd–Y–Zr alloy. The position of the RE elements within the β_T phase is identified using atomic-resolution high-angle annular dark field scanning transmission electron microscopy imaging, and the β_T phase is shown to have an orthorhombic structure with a stoichiometry of Mg₅RE. Based on these observations, a new precipitation sequence is proposed.

Keywords:

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

A new metastable precipitate phase in Mg–Gd–Y–Zr alloy

Information for

Open access

Opportunities

Help and information

A new metastable precipitate phase in Mg–Gd–Y–Zr alloy

Abstract

Reprints and Corporate Permissions

Academic Permissions

Related research

To cite this article:

Download citation

Information for

Open access

Opportunities

Help and information

Keep up to date

Your download is now in progress and you may close this window

Login or register to access this feature