HARDENING AND STRAIN-AGING BY VACANCIES AND THEIR AGGREGATES IN FEAL

被引：43

作者：

MORRIS, DG

JOYE, JC

LEBOEUF, M

机构：

[1] Institute of Structural Metallurgy, University of Neuchǎtel, Neuchǎtel

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1994年 / 69卷 / 05期

关键词：

D O I：

10.1080/01418619408242530

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Yield stress and ageing discontinuities have been examined in a Fe 43%Al alloy after carefully ageing in an attempt to control the number of excess vacancies and the form of their annihilation aggregates. Vacancies, probably present as submicroscopic aggregates, can act as strengthening obstacles to subsequent dislocation movement. When the vacancies are present in the form of somewhat coarser aggregates or dislocation loops they may act both as dislocation obstacles and vacancy sources during subsequent deformation at intermediate temperatures. The strengthening obtained depends sensitively on the precise vacancy aggregate present. In addition, such vacancy aggregates can lead to significant dynamic dislocation locking and the appearance of both static and dynamic strain ageing phenomena.

引用

页码：961 / 980

页数：20

共 38 条

[1] INSITU STRAINING OF FE-AL IN A TRANSMISSION ELECTRON-MICROSCOPE [J].

BAKER, I ;

HORTON, JA .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1993, 67 (02) :479-489

[2] THE EFFECT OF GRAIN-SIZE ON THE YIELD STRENGTH OF FEAL AND NIAL [J].

BAKER, I ;

NAGPAL, P ;

LIU, F ;

MUNROE, PR .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (07) :1637-1644

[3] FLOW AND FRACTURE OF FE-AL [J].

BAKER, I ;

GAYDOSH, DJ .

MATERIALS SCIENCE AND ENGINEERING, 1987, 96 :147-158

[4] ORIENTATION DEPENDENCE OF DEFORMATION MODE AND STRUCTURE IN STOICHIOMETRIC NIAL SINGLE-CRYSTALS DEFORMED BY HIGH-TEMPERATURE STEADY-STATE CREEP [J].

BEVK, J ;

DODD, RA ;

STRUTT, PR .

METALLURGICAL TRANSACTIONS, 1973, 4 (01) :159-166

[5] DUCTILITY AND DYNAMIC STRAIN AGING IN RAPIDLY SOLIDIFIED ALUMINUM-ALLOYS [J].

BOUCHAUD, E ;

KUBIN, L ;

OCTOR, H .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (05) :1021-1028

[6] CORRELATION OF THE HARDNESS AND VACANCY CONCENTRATION IN FEAL [J].

CHANG, YA ;

PIKE, LM ;

LIU, CT ;

BILBREY, AR ;

STONE, DS .

INTERMETALLICS, 1993, 1 (02) :107-115

[7] THE RELATIONSHIP BETWEEN COOLING RATE, GRAIN-SIZE AND THE MECHANICAL-BEHAVIOR OF B2 FE-AL ALLOYS [J].

CRIMP, MA ;

VEDULA, KM .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1993, 165 (01) :29-34

[8] ROOM-TEMPERATURE DEFORMATION OF SINGLE-CRYSTAL-B2 FE-AL ALLOYS - THE EFFECT OF STOICHIOMETRY AND COOLING RATE [J].

CRIMP, MA ;

VEDULA, K .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1991, 63 (03) :559-570

[9] ANNEALING OUT OF QUENCHED-IN VACANCIES IN AN ORDERED B2-TYPE FE-AL SINGLE-CRYSTAL [J].

FOURDEUX, A ;

LESBATS, P .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1982, 45 (01) :81-93

[10]

Friedel J., 1964, DISLOCATIONS

← 1 2 3 4 →