Effect of environment on tensile ductility and fracture toughness of iron aluminides

被引：28

作者：

Ko, SH ^{[1
]}

Gnanamoorthy, R ^{[1
]}

Hanada, S ^{[1
]}

机构：

[1] TOHOKU UNIV, INST MAT RES, SENDAI, MIYAGI 980, JAPAN

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 222卷 / 02期

关键词：

iron aluminides; environmental embrittlement; ordering; aluminum content; tensile ductility; fracture toughness; fractography;

D O I：

10.1016/S0921-5093(96)10459-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of environment on the tensile ductility and fracture toughness of Fe-28at.%Al and Fe-35at.%Al are investigated. Room-temperature fracture toughness of the iron aluminides investigated in air ranged between 35 and 40 MPa m(1/2), significantly higher than those of many ordered intermetallic alloys. A significant effect of environment is observed on the tensile ductility and fracture toughness. The effect of environment is more significant in Fe-35Al compared with Fe-28Al. The fracture surface morphology of the specimens tested differed in test environments in B2 ordered Fe-28Al and Fe-35Al, while in D0(3) ordered Fe-28Al it was more or less similar, mostly transgranular cleavage, in all the environments tested. Increased intergranular fracture regions were observed in B2 ordered Fe-28Al and Fe-35Al when tested in vacuum and oxygen, compared with that tested in air.

引用

页码：133 / 139

页数：7

共 18 条

[1]

*ASTM, 1982, 1981 ANN BOOK AST 10, P592

[2]

BEGLEY JA, 1972, ASTM STP, V514, P1

[3]

CASTAGNA A, 1993, HIGH TEMPERATURE ORD, V288, P1043

[4]

George E. P., 1995, High-Temperature Ordered Intermetallic Alloys VI. Symposium, P1131

[5] FRACTURE-TOUGHNESS OF GAMMA-BASE TITANIUM ALUMINIDES [J].

GNANAMOORTHY, R ;

MUTOH, Y ;

MASAHASHI, N ;

MIZUHARA, Y .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1995, 26 (02) :305-313

[6]

KLEIN O, 1993, MAT RES S C, V288, P935

[7] ENVIRONMENTAL-EFFECTS ON ROOM-TEMPERATURE DUCTILITY AND FRACTURE IN FE3AL [J].

LIU, CT ;

MCKAMEY, CG ;

LEE, EH .

SCRIPTA METALLURGICA ET MATERIALIA, 1990, 24 (02) :385-389

[8]

LYNCH RJ, 1994, PROCESSING, PROPERTIES, AND APPLICATIONS OF IRON ALUMINIDES, P287

[9]

MUTOH Y, 1989, T JPN SOC MECH ENG A, V55, P1613

[10] EFFECT OF COOLING RATE ON HARDNESS OF FEAL AND NIAL [J].

NAGPAL, P ;

BAKER, I .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (08) :2281-2282

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