High pressure aging synthesis of a hexagonal Mg2Sn strengthening precipitate in Mg-Sn alloys

被引：27

作者：

Fu, Hui ^{[1
]}

Guo, Jianxin ^{[1
]}

Wu, Wenshi ^{[1
]}

Liu, Baozhong ^{[1
]}

Peng, Qiuming ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

来源：

MATERIALS LETTERS | 2015年 / 157卷

关键词：

Mg-Sn alloys; Microstructure; Mechanical properties; Crystal structure; AGE-HARDENING RESPONSE; CREEP RESISTANCE; GD ALLOYS; PHASE;

D O I：

10.1016/j.matlet.2015.05.087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel hexagonal Mg2Sn strengthening precipitate has been achieved by high pressure aging (2 GPa, 400 degrees C) method in a Mg-9 wt% Sn alloy for the first time. The results show the particle is ellipsoid-shaped with an average diameter of 25 nm. Differing from the conventional coarse plate-like or rod-like Mg2Sn strengthening particles with face-centered cubic structure after artificial aging at similar to 200 degrees C, the formation of novel fine hexagonal Mg2Sn particles significantly improves the strength of Mg-Sn alloys together with the ductility. The high strength and ductility are mainly associated with the presence of fine strengthening precipitates and the low lattice misfit (0.025) of hexagon-on-hexagon crystallographic orientation, respectively. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：172 / 175

页数：4

共 16 条

[1] Phase compositions in magnesium-rare earth alloys containing yttrium, gadolinium or dysprosium [J].

Apps, PJ ;

Karimzadeh, H ;

King, JF ;

Lorimer, GW .

SCRIPTA MATERIALIA, 2003, 48 (05) :475-481

[2] MAGNESIUM COMPOUNDS - NEW DENSE PHASES [J].

CANNON, P ;

CONLIN, ET .

SCIENCE, 1964, 145 (363) :487-&

[3]

DYUZHEVA TI, 1972, KRISTALLOGRAFIYA+, V17, P804

[4]

Estrin Y., 1995, Continuum Models for Materials with Microstructure, P395

[5] High-pressure synthesis of a nanoscale YB12 strengthening precipitate in Mg-Y alloys [J].

Fu, Hui ;

Peng, Qiuming ;

Guo, Jianxin ;

Liu, Baozhong ;

Wu, Wenshi .

SCRIPTA MATERIALIA, 2014, 76 :33-36

[6] Enhanced precipitation-hardening in Mg-Gd alloys containing Ag and Zn [J].

Gao, X. ;

Nie, J. F. .

SCRIPTA MATERIALIA, 2008, 58 (08) :619-622

[7] Precipitation of DO19 type metastable phase in Mg-Sn alloy [J].

Kim, Y. K. ;

Kim, Do H. ;

Kim, W. T. ;

Kim, D. H. .

MATERIALS LETTERS, 2013, 113 :50-53

[8] Comparison between dislocation dynamics model predictions and experiments in precipitation-strengthened Al-Li-Sc alloys [J].

Krug, Matthew E. ;

Mao, Zugang ;

Seidman, David N. ;

Dunand, David C. .

ACTA MATERIALIA, 2014, 79 :382-395

[9] Enhanced age hardening response and creep resistance of Mg-Gd alloys containing Zn [J].

Nie, JF ;

Gao, X ;

Zhu, SM .

SCRIPTA MATERIALIA, 2005, 53 (09) :1049-1053

[10] Characterisation of strengthening precipitate phases in a Mg-Y-Nd alloy [J].

Nie, JF ;

Muddle, BC .

ACTA MATERIALIA, 2000, 48 (08) :1691-1703

← 1 2 →