STRUCTURE OF MECHANICALLY ALLOYED TI-AL-NB POWDERS

被引：45

作者：

CHEN, GH

SURYANARAYANA, C

FROES, FH

机构：

[1] UNIV IDAHO, DEPT MIN & MET ENGN, MOSCOW, ID 83844 USA

[2] UNIV IDAHO, INST MAT & ADV PROC, MOSCOW, ID 83844 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1995年 / 26卷 / 06期

关键词：

D O I：

10.1007/BF02647588

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti-Al-Nb ternary powder mixtures containing 24Al-11Nb, 25Al-25Nb, 37.5Al-12.5Nb, and 28.5Al-23.9Nb (at. pet) were mechanically alloyed in a SPEX 8000 mixer mill using a ball-to-powder weight ratio of 10:1. The structural evolution in these alloys was investigated by X-ray diffraction and transmission electron microscopy techniques. A solid solution of Al and Nb in Ti was formed at an early stage of milling, followed by the B2/body-centered cubic (bcc) and amorphous phases at longer milling times. The stability of these phases and their transformation to other phases have been investigated by heat treating these powders at different temperatures. The B2/bcc phase transformed into an orthorhombic (O-Ti2AlNb) or a mixture of the orthorhombic (O) and hexagonal close-packed (alpha(2)-Ti3Al) phases, the proportion of phases being dependent on the powder composition. Milling beyond the amorphous phase formation resulted in the formation of an fee phase in all the powders, which appears to be TiN, formed as a result of contamination of the powder.

引用

页码：1379 / 1387

页数：9

共 51 条

[1]

AHN JH, 1992, MATER SCI FORUM, V88, P347, DOI 10.4028/www.scientific.net/MSF.88-90.347

[2]

[Anonymous], 1993, ELEMENTS XRAY DIFFRA

[3] 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

[4] THE FORMATION OF ORDERED OMEGA-RELATED PHASES IN ALLOYS OF COMPOSITION TI4AL3NB [J].

BENDERSKY, LA ;

BOETTINGER, WJ ;

BURTON, BP ;

BIANCANIELLO, FS ;

SHOEMAKER, CB .

ACTA METALLURGICA ET MATERIALIA, 1990, 38 (06) :931-943

[5]

BENDERSKY LA, 1989, MATER RES SOC SYMP P, V133, P45

[6]

BENJAMIN JS, 1970, METALL TRANS, V1, P2943

[7] AMORPHIZATION AND PHASE-TRANSFORMATIONS IN MECHANICALLY ALLOYED TI-AL POWDERS - ELECTRON-MICROSCOPY INVESTIGATION [J].

BONETTI, E ;

COCCO, G ;

ENZO, S ;

VALDRE, G .

MATERIALS SCIENCE AND TECHNOLOGY, 1990, 6 (12) :1258-1262

[8] THE DECOMPOSITION PROCESS OF RAPIDLY SOLIDIFIED TI-25 AT-PERCENT AL-25 AT-PERCENT NB [J].

CHANG, CP ;

LORETTO, MH .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1991, 63 (03) :389-406

[9] SYNTHESIS OF B2-PHASE IN TI-AL-NB ALLOYS BY MECHANICAL ALLOYING [J].

CHEN, GH ;

SURYANARAYANA, C ;

FROES, FH .

SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (11) :2537-2540

[10]

CHEN GH, 1993, TITANIUM '92: SCIENCE AND TECHNOLOGY, VOLS 1-3, P903

← 1 2 3 4 5 6 →