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

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