Effect of γ2-phase precipitates on the martensitic transformation of a β-CuAlBe shape memory alloy

被引：24

作者：

Cuniberti, A. ^{[1
,2
]}

Montecinos, S. ^{[1
,2
]}

Lovey, F. C. ^{[3
]}

机构：

[1] Univ Nacl Ctr Prov Buenos Aires, Inst Fis Mat Tandil, RA-7000 Tandil, Argentina

[2] Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina

[3] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

INTERMETALLICS | 2009年 / 17卷 / 06期

关键词：

Ternary alloy systems; Martensitic transformations; Precipitates; Thermodynamics; CU-ZN-AL; DISORDER; DECOMPOSITION; CALORIMETRY;

D O I：

10.1016/j.intermet.2008.12.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of gamma(2) precipitates on the MT of a Cu-22.66Al-2.98Be (at%) polycrystalline alloy was analysed by compression test, differential scanning calorimetry and microscopy. As the precipitate content (or size) increases, the stress-induced martensitic transformation occurs at higher stress levels. The thermally induced martensitic transformation is only significantly affected when the gamma(2) phase content exceeds 14%, the thermal peaks are shifted to higher temperatures and less beta phase transforms to martensite. TEM observations suggest good coherency between both phases, and dislocation bundles remain in the beta side of the gamma(2)/beta interface after the compression-induced transformation to martensite. The evolution of sigma(s) with fv gamma(2) is analysed considering a chemical and a mechanical contribution. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：435 / 440

页数：6

共 24 条

[1] ELABORATION AND CHARACTERIZATION OF NEW LOW-TEMPERATURE SHAPE-MEMORY CU-AL-BE ALLOYS [J].

BELKAHLA, S ;

ZUNIGA, HF ;

GUENIN, G .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 169 (1-2) :119-124

[2] Isothermal decomposition of the Cu-22.72Al-3.55Be at.% alloy [J].

Castro, ML ;

Romera, R .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 287 (01) :66-71

[3] Thermodynamic analysis of the martensitic transformation in plastically deformed NiTi alloy [J].

Chrobak, D ;

Morawiec, H .

SCRIPTA MATERIALIA, 2001, 44 (05) :725-730

[4] Differential scanning calorimetry study of deformed Cu-Zn-Al martensite [J].

Cuniberti, A ;

Romero, R .

SCRIPTA MATERIALIA, 2004, 51 (04) :315-320

[5] THE PLASTIC-DEFORMATION OF LONG-RANGE ORDERED 18R MARTENSITIC SINGLE-CRYSTALS OF CU-ZN-AL ALLOYS [J].

CUNIBERTI, A ;

ROMERO, R ;

AHLERS, M .

SCRIPTA METALLURGICA ET MATERIALIA, 1992, 26 (03) :495-500

[6] ORIENTED GROWTH OF GAMMA PRECIPITATES AND TWSME IN CU-ZN-AL [J].

ISALGUE, A ;

LOVEY, FC ;

SADE, M .

SCRIPTA METALLURGICA ET MATERIALIA, 1993, 28 (10) :1183-1188

[7] Study of the order-disorder phase transitions in Cu-Al-Be shape memory alloys [J].

Jurado, M ;

Castan, T ;

Manosa, L ;

Planes, A ;

Bassas, J ;

Alcobe, X ;

Morin, M .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1997, 75 (05) :1237-1250

[8] Influence of Be addition on order-disorder transformations in β Cu-Al [J].

Lanzini, Fernando ;

Romero, Ricardo ;

Castro, Maria Lujan .

INTERMETALLICS, 2008, 16 (09) :1090-1094

[9] Phase equilibria in the Cu-rich portion of the Cu-Al binary system [J].

Liu, XJ ;

Ohnuma, I ;

Kainuma, R ;

Ishida, K .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 264 (1-2) :201-208

[10] INTERACTION OF SINGLE VARIANT MARTENSITIC-TRANSFORMATION WITH SMALL GAMMA-TYPE PRECIPITATES IN CU-ZN-AL [J].

LOVEY, FC ;

TORRA, V ;

ISALGUE, A ;

ROQUETA, D ;

SADE, M .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (02) :453-460

← 1 2 3 →