High-temperature deformation of a mechanically alloyed niobium-yttria alloy

被引：6

作者：

Chou, I ^{[1
]}

Koss, DA ^{[1
]}

Howell, PR ^{[1
]}

Ramani, AS ^{[1
]}

机构：

[1] PENN STATE UNIV,DEPT MAT SCI & ENGN,UNIVERSITY PK,PA 16802

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 222卷 / 01期

关键词：

niobium-yttria alloys; mechanical alloying; hot isostatic pressing;

D O I：

10.1016/S0921-5093(96)10450-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mechanical alloying (MA) and hot isostatic pressing have been used to process two Nb alloys containing yttria particles, Nb-2vol.%Y2O3 and Nb-10vol.%Y2O3. Similar to some thermomechanically processed nickel-based alloys, both alloys exhibit partially recrystallized microstructures, consisting of a 'necklace' of small recrystallized grains surrounding much larger but isolated, unrecrystallized, cold-worked grains. Hot compression tests from 1049 to 1347 degrees C (0.5-0.6T(MP)) of the 10% Y2O3 alloy show that MA material possesses a much higher yield and creep strength than its powder-blended, fully recrystallized counterpart. In fact, the density-compensated specific yield strength of the MA Nb-10Y(2)O(3) exceeds that of currently available commercial Nb alloys.

引用

页码：14 / 20

页数：7

共 25 条

[1]

ANTON DL, 1991, HIGH TEMPERATURE NIO, P49

[2] DEVELOPMENT OF THE NECKLACE STRUCTURE IN A POWDER-PRODUCED NICKEL-BASE SUPER-ALLOY [J].

BEE, JV ;

JONES, AR ;

HOWELL, PR .

JOURNAL OF MATERIALS SCIENCE, 1980, 15 (02) :337-344

[3] MECHANISM OF MECHANICAL ALLOYING [J].

BENJAMIN, JS ;

VOLIN, TE .

METALLURGICAL TRANSACTIONS, 1974, 5 (08) :1929-1934

[4] DEVELOPMENT OF A NECKLACE MICROSTRUCTURE DURING ISOTHERMAL DEFORMATION AND ITS PROPERTIES RELATIVE TO UNIFORM MICROSTRUCTURES [J].

BHOWAL, PR ;

BHATHENA, NM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (09) :1999-2008

[5]

Brandes E.A., 1992, Smithells Metals reference Book, V7th

[6]

Brown L.M., 1971, STRENGTHENING METHOD, DOI 10.1016/0010-4361(71)90158-3

[7] GRAIN-GROWTH IN DISPERSION STRENGTHENED SUPERALLOYS BY MOVING ZONE HEAT-TREATMENTS [J].

CAIRNS, RL ;

CURWICK, LR ;

BENJAMIN, JS .

METALLURGICAL TRANSACTIONS, 1975, 6 (01) :179-186

[8]

ENGLISH C, 1984, NIOBIUM, P239

[9]

FROST HJ, 1981, DEFORMATION MECH MAP, P28

[10] ON THEORY OF EFFECT OF PRECIPITATE PARTICLES ON GRAIN GROWTH IN METALS [J].

GLADMAN, T .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1966, 294 (1438) :298-&

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