Effect of the ordering process on pseudoelasticity in Fe3Ga single crystals

被引：28

作者：

Yasuda, H. Y.

Aoki, M.

Umakoshi, Y.

机构：

[1] Osaka Univ, Res Ctr Ultra High Voltage Electron Microscopy, Ibaraki, Osaka 5670047, Japan

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan

来源：

ACTA MATERIALIA | 2007年 / 55卷 / 07期

关键词：

iron aluminides; transmission electron microscopy; order-disorder phenomena; shape memory alloys; dislocation;

D O I：

10.1016/j.actamat.2006.11.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pseudoelastic behaviour of Fe3Ga single crystals with the D0(3) structure was investigated focusing on the annealing conditions and Ga content. In these D0(3)-ordered Fe3Ga single crystals, uncoupled and paired 1/4[111] superpartial dislocations moved, dragging the nearest-neighbour and next-nearest-neighbour anti-phase boundaries (APBs), respectively. These APBs pulled back the superpartials during unloading, resulting in pseudoelasticity, though a martensitic transformation never occurred in the crystals. The amount of strain recovery increased with increasing Ga content up to 25.4 at.% when the crystals were annealed at 853-893 K within 10 h. In particular, nearly perfect pseudoelasticity with a recoverable strain of 5% was obtained at 24.2 and 25.4 at.% Ga after an appropriate heat treatment. Isothermal annealing in the D0(3) single phase region was effective in improving pseudoelastic properties. Moreover, the metastable D0(3) phase also exhibited pseudoelasticity, even if the (alpha + L1(2)) or (D0(3) + L1(2)) dual phase was thermally stable in the equilibrium state. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2407 / 2415

页数：9

共 24 条

[1] On pseudoelasticity in single crystals of the intermetallic compound Fe3Al [J].

Brinck, A ;

Engelke, C ;

Neuhauser, H .

SCRIPTA MATERIALIA, 1997, 37 (05) :569-574

[2] ELECTRON-MICROSCOPY STUDY OF PASSIVATING LAYER ON IRON-NICKEL MARTENSITE [J].

CHEN, SH ;

MORRIS, JW .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1977, 8 (01) :19-26

[3] Magnetostrictive properties of body-centered cubic Fe-Ga and Fe-Ga-Al alloys [J].

Clark, AE ;

Restorff, JB ;

Wun-Fogle, M ;

Lograsso, TA ;

Schlagel, DL .

IEEE TRANSACTIONS ON MAGNETICS, 2000, 36 (05) :3238-3240

[4] PSEUDO-ELASTICITY IN ORDERED FE-AL ALLOYS [J].

GUEDOU, JY ;

PALIARD, M ;

RIEU, J .

SCRIPTA METALLURGICA, 1976, 10 (07) :631-634

[5] TWINNING AND PSEUDO-ELASTICITY IN SINGLE-CRYSTAL FE-AL ALLOYS [J].

GUEDOU, JY ;

RIEU, J .

SCRIPTA METALLURGICA, 1978, 12 (10) :927-930

[6] Phase equilibria and stability of ordered b.c.c. phases in the Fe-rich portion of the Fe-Ga system [J].

Ikeda, O ;

Kainuma, R ;

Ohnuma, I ;

Fukamichi, K ;

Ishida, K .

JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 347 (1-2) :198-205

[7]

Kabra S, 2005, MATER RES SOC SYMP P, V842, P21

[8] Superdislocations and antiphase boundary energies in deformed Fe3Al single crystals with chromium [J].

Kral, F ;

Schwander, P ;

Kostorz, G .

ACTA MATERIALIA, 1997, 45 (02) :675-682

[9] PSEUDOELASTICITY AND SLIP REVERSIBILITY IN DO3-ORDERED FE-AL SINGLE-CRYSTALS BY INSITU EXPERIMENTS [J].

KUBIN, LP ;

FOURDEUX, A ;

GUEDOU, JY ;

RIEU, J .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1982, 46 (03) :357-378

[10] Pseudoelasticity in Fe3Al single crystals [J].

Langmaack, E ;

Nembach, E .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1999, 79 (10) :2359-2377

← 1 2 3 →