TRANSFORMATIONS IN A TI-24AL-15NB ALLOY .2. A COMPOSITION INVARIANT BETA-0-] O TRANSFORMATION

被引：75

作者：

MURALEEDHARAN, K ^{[1
]}

NANDY, TK ^{[1
]}

BANERJEE, D ^{[1
]}

LELE, S ^{[1
]}

机构：

[1] BANARAS HINDU UNIV,INST TECHNOL,DEPT MET ENGN,VARANASI 221005,UTTAR PRADESH,INDIA

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1992年 / 23卷 / 02期

关键词：

D O I：

10.1007/BF02801159

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article explores the nature of a composition invariant phase transformation from beta(0) (B2, Ti2AlNb) to an orthorhombic O phase (Cmcm) on aging a beta-quenched Ti-24Al-15Nb alloy. The transformation product is shown to contain a variety of defect structures whose origins are analyzed and explained. The orthorhombic phase is shown in exist in two forms: (1) in which the Nb atoms occupy a specific sublattice and (2) in which the Nb and Ti atoms randomly occupy the same sublattice. The subsequent decomposition of the metastable O product into the equilibrium phases is also described.

引用

页码：417 / 431

页数：15

共 20 条

[1] CRYSTALLOGRAPHIC AND MECHANISTIC ASPECTS OF GROWTH BY SHEAR AND BY DIFFUSIONAL PROCESSES [J].

AARONSON, HI ;

FURUHARA, T ;

RIGSBEE, JM ;

REYNOLDS, WT ;

HOWE, JM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (09) :2369-2409

[2] A NEW ORDERED ORTHORHOMBIC PHASE IN A TI3AL-NB ALLOY [J].

BANERJEE, D ;

GOGIA, AK ;

NANDI, TK ;

JOSHI, VA .

ACTA METALLURGICA, 1988, 36 (04) :871-882

[3] SITE OCCUPATION IN THE ORDERED BETA PHASE OF TERNARY TI-AL-NB ALLOYS [J].

BANERJEE, D ;

NANDY, TK ;

GOGIA, AK .

SCRIPTA METALLURGICA, 1987, 21 (05) :597-600

[4]

BANERJEE D, 1987, UNPUB

[5]

BANERJEE D, 1989, J PHYS, P1091

[6] COHERENT PRECIPITATES IN THE BCC ORTHORHOMBIC 2-PHASE FIELD OF THE TI-AL-NB SYSTEM [J].

BENDERSKY, LA ;

BOETTINGER, WJ ;

ROYTBURD, A .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (08) :1959-1969

[7] DIFFUSIONAL AND DISPLACIVE TRANSFORMATIONS [J].

BHADESHIA, HKDH .

SCRIPTA METALLURGICA, 1987, 21 (08) :1017-1022

[8] GROWTH-MECHANISM OF AUCU-II PLATES [J].

BOWLES, JS ;

WAYMAN, CM .

ACTA METALLURGICA, 1979, 27 (05) :833-839

[9] On the process of transition of the cubic-body-centered modification into the hexagonal-close-packed modification of zirconium [J].

Burgers, WG .

PHYSICA, 1934, 1 :561-586

[10] MARTENSITE TRANSFORMATION IN TI-CR BINARY ALLOYS [J].

ERICKSEN, RH ;

TAGGART, R ;

POLONIS, DH .

ACTA METALLURGICA, 1969, 17 (05) :553-&

← 1 2 →