STRESS CORROSION CRACKING RESISTANCE OF ALUMINUM ALLOY 7000 SERIES AFTER TWO-STEP AGING

被引：2
|
作者：
Jegdic, Bore V. [1 ]
Bobic, Biljana M. [1 ]
Pavlovic, Milos K. [2 ]
Alil, Ana B. [3 ]
Putic, Slavisa S. [4 ]
机构：
[1] Univ Belgrade, Inst Chem Technol & Met, Belgrade, Serbia
[2] Welding Inst, Belgrade, Serbia
[3] Univ Belgrade, Fac Technol & Met, Innovat Ctr, Belgrade 11000, Serbia
[4] Univ Belgrade, Fac Technol & Met, Belgrade 11000, Serbia
来源：
CHEMICAL INDUSTRY & CHEMICAL ENGINEERING QUARTERLY | 2015年 / 21卷 / 02期
关键词：
aluminum alloys; stress corrosion cracking; aging; mechanical properties; MG-CU ALLOY;
D O I：
10.2298/CICEQ140324024J
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The effect of one-step and a new (short) two-step aging process on the resistance to stress corrosion cracking of an aluminum alloy 7000 series was investigated, using slow strain rate test and fracture mechanics method The aging level in the tested alloy was evaluated by means of scanning electron microscopy and measurements of electrical resistivity. It was shown that the alloy after the new two-step aging is significantly more resistant to stress corrosion cracking. Values of tensile properties and fracture toughness are similar for both thermal states. Processes that take place at the crack tip have been considered. The effect of the testing solution temperature on the crack growth rate on the plateau was determined. Two values of the apparent activation energy were obtained. These values correspond to different processes that control crack growth rate on the plateau at higher and lower temperatures.
引用
收藏
页码：261 / 268
页数：8
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