THE EFFECT OF MICROSTRUCTURE ON THE MECHANICAL-BEHAVIOR AND FRACTURE MECHANISM IN A 7050-T76 ALUMINUM-ALLOY

被引：37

作者：

ALARCON, OE

NAZAR, AMM

MONTEIRO, WA

机构：

[1] UNIV ESTADUAL CAMPINAS,DEMA,BR-13100 CAMPINAS,SP,BRAZIL

[2] IPEN,DM CNEN,SAO PAULO,BRAZIL

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 138卷 / 02期

关键词：

D O I：

10.1016/0921-5093(91)90697-L

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The mechanical behavior of the 7050 aluminum alloy with partially recrystallized (PR), recrystallized (R) and unrecrystallized (UR) microstructures was investigated. The UR and R microstructures were produced by thermomechanical treatment. The monotonic tensile properties showed no significant difference between the microstructures, but the fracture toughness of the UR microstructure showed a significant improvement over that of the PR and R microstructures. The higher fracture toughness was associated with a transgranular fracture mode and larger blunting of the crack tip. In situ deformation studies by transmission electron microscopy showed that the fracture process was due to a stress concentration effect at the crack tip.

引用

页码：275 / 285

页数：11

共 36 条

[21]

MCQUEEN HJ, 1974, THERMOMECHANICAL TRE, P1

[22]

MUELLER LN, 1983, GREEN LETT, V220

[23] EFFECT OF A FINE PARTICLE DISPERSION ON HETEROGENEOUS RECRYSTALLIZATION [J].

NES, E .

ACTA METALLURGICA, 1976, 24 (05) :391-398

[24] AN ELECTRON-MICROSCOPE STUDY OF CRACK TIP DEFORMATION AND ITS IMPACT ON THE DISLOCATION THEORY OF FRACTURE [J].

OHR, SM .

MATERIALS SCIENCE AND ENGINEERING, 1985, 72 (01) :1-35

[25]

PARK BK, 1979, THERMOMECHANICAL PRO, P25

[26]

RIUM N, 1969, ACTA METALL, V17, P921

[27]

ROSENFIELD AR, 1968, METALL REV, V121, P29

[28] THE EFFECT OF SLIP DISTRIBUTION ON THE MONOTONIC AND CYCLIC DUCTILITY OF AL-LI BINARY-ALLOYS [J].

SANDERS, TH ;

STARKE, EA .

ACTA METALLURGICA, 1982, 30 (05) :927-939

[29]

SHEWMON PG, 1969, TRANSFORMATIONS META, P205

[30] THE INFLUENCE OF GRAIN-STRUCTURE ON THE DUCTILITY OF THE AL-CU-LI-MN-CD ALLOY-2020 [J].

STARKE, EA ;

LIN, FS .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1982, 13 (12) :2259-2269

← 1 2 3 4 →