CALORIMETRIC AND ULTRASONIC INVESTIGATION OF THE R-PHASE FORMATION IN A TINIFE ALLOY

被引：7

作者：

MANOSA, L ^{[1
]}

RIOSJARA, D ^{[1
]}

ORTIN, J ^{[1
]}

PLANES, A ^{[1
]}

BOHIGAS, X ^{[1
]}

机构：

[1] UNIV BARCELONA,FAC FIS,DEPT FIS FONAMENTAL,E-08028 BARCELONA,SPAIN

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 34期

关键词：

D O I：

10.1088/0953-8984/4/34/006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report a systematic calorimetric study of the formation of the R-phase in a polycrystalline TiNi:Fe alloy, conducted using a high-sensitivity scanning device. Thermograms performed at very slow heating/cooling rates always appear as an overlap of two peaks. The high-temperature peak does not present any hysteresis and is associated with a continuous transition to the intermediate incommensurate phase. Extrapolation at zero heating/cooling rates gives a value of 1.8 K for the intrinsic thermal hysteresis of the second peak at lower temperatures, ascribed to the first-order transition from the incommensurate to the R-phase. The paper also reports ultrasonic measurements on this alloy. Elastic anomalies in both longitudinal and shear elastic constants and in the ultrasonic attenuation have been detected in the same temperature region as the overall thermal effect.

引用

页码：7059 / 7066

页数：8

共 22 条

[1] ELASTIC PROPERTIES OF NITI [J].

BRILL, TM ;

MITTELBACH, S ;

ASSMUS, W ;

MULLNER, M ;

LUTHI, B .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (48) :9621-9627

[2]

FALKINS I, 1989, PHYS REV B, V40, P255

[3] THE B2 TO R TRANSFORMATION IN TI50NI47FE3 AND TI49.5NI50.5 ALLOYS [J].

GOO, E ;

SINCLAIR, R .

ACTA METALLURGICA, 1985, 33 (09) :1717-1723

[4]

GUENIN G, 1987, P ICOMAT 86, P794

[5] TRANSFORMATION BEHAVIOR OF A TI50NI47FE3 ALLOY .2. SUBSEQUENT PREMARTENSITIC BEHAVIOR AND THE COMMENSURATE PHASE [J].

HWANG, CM ;

MEICHLE, M ;

SALAMON, MB ;

WAYMAN, CM .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1983, 47 (01) :31-62

[6] INTRINSIC ULTRASONIC-ATTENUATION DURING THE MARTENSITIC-TRANSFORMATION OF CU-ZN-AL [J].

MANOSA, L ;

MACQUERON, JL ;

BABOUX, JC .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1991, 3 (33) :6257-6266

[7]

MATSUMOTO M, 1976, 1 JIM INT S MART KOB, P199

[8] SINGLE-CRYSTAL ELASTIC-CONSTANTS OF THE EQUIATOMIC NITI ALLOY NEAR THE MARTENSITIC-TRANSFORMATION [J].

MERCIER, O ;

MELTON, KN ;

GREMAUD, G ;

HAGI, J .

JOURNAL OF APPLIED PHYSICS, 1980, 51 (03) :1833-1834

[9] FIBROUS GOETHITE IN SOME SOILS FROM JAPAN AND SCOTLAND [J].

NAKAI, M ;

YOSHINAGA, N .

GEODERMA, 1980, 24 (02) :143-158

[10] PHASE-TRANSFORMATIONS IN A TI50NI47.5FE2.5 SHAPE MEMORY ALLOY [J].

NISHIDA, M ;

WAYMAN, CM ;

HONMA, T .

METALLOGRAPHY, 1986, 19 (01) :99-113

← 1 2 3 →