Characterization of Al-Mg Alloy Aged at Low Temperatures

被引：34

作者：

Yi, Gaosong ^{[1
]}

Cullen, David A. ^{[2
]}

Littrell, Kenneth C. ^{[3
]}

Golumbfskie, William ^{[4
]}

Sundberg, Erik ^{[1
]}

Free, Michael L. ^{[1
]}

机构：

[1] Univ Utah, Dept Met Engn, 135 S 1460 E,Rm412, Salt Lake City, UT 84112 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[4] Naval Sea Syst Command Carderock Div, West Bethesda, MD 20817 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2017年 / 48A卷 / 04期

关键词：

STRESS-CORROSION CRACKING; ANGLE NEUTRON-SCATTERING; GUINIER-PRESTON ZONES; MICROSTRUCTURAL EVOLUTION; ELECTRON-MICROSCOPY; GRAIN-BOUNDARY; GP ZONES; PRECIPITATION; PHASE; DECOMPOSITION;

D O I：

10.1007/s11661-017-3992-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Long-term aged [343 K (70 A degrees C) for 30 months and natural exposure for over 10 years] Al 5456 H116 samples were characterized using electron backscatter diffraction (EBSD), scanning transmission electron microscopy (STEM), state-of-the-art energy-dispersive X-ray spectroscopy (EDS) systems, and small-angle neutron scattering (SANS). ASTM G-67 mass loss tests of the sensitized Al 5456 alloy samples were conducted. Intragranular Mg-rich precipitates, such as Guinier-Preston (GP) zones, were confirmed in Al 5456 H116 aged at 343 K (70 A degrees C) for 30 months, and the volume of these precipitates is 1.39 pct. beta' phase is identified at the grain boundary of a navy ship sample, while high-resolution STEM results reveal no intragranular precipitates. Intergranular corrosion (IGC) of Al 5456 was found to be related to the continuity of intergranular precipitates.

引用

页码：2040 / 2050

页数：11

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