Improving corrosion resistance of RE-containing magnesium alloy ZE41A through ECAP

JIANG; Jinghua; MA; Aibin

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Improving corrosion resistance of RE-containing magnesium alloy ZE41A through ECAP

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摘要

Significant grain refinement was achieved in rare earth (RE) containing aeronautic magnesium alloy ZE41A through equal-chan-nel angular pressing (ECAP) using rotary die at 603 K. Influence of ECAP pass number on its microstructure change and corrosion behavior was investigated by optical microscope (OM)/scanning electron microscope (SEM) observation and potentiostatic polarization tests in aque-otis solution of NaCl, respectively. The results showed that ultrafine equiaxial grains (about 2.5 μm) were obtained over 16 passes due to plastic-induced grain refinement accommodated by dynamic recrystallization. The lower corrosion current density and nobler corrosion po-tential correlated with large number of pressing passes were attributed to the low tendency toward localized corrosion with broken secondary phase after homogenization on ultrafine-grained Mg matrix. The multi-pass ECAP method made the ZE41A aeronautic magnesium alloy more attractive since severe plastic deformation may significandy improve its corrosion resistance besides superior mechanical properties.

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《中国稀土学报：英文版》 |2009年第005期|P.848-852|共5页
作者
JIANG; Jinghua; MA; Aibin;
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作者单位

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

China;

Department;

of;

Materials;

Science;

and;

Engineering,;

North;

Carolina;

State;

University,;

Raleigh,;

North;

Carolina;

27695-7919,USA;

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

China;

National;

Institute;

of;

Advanced;

Industrial;

Science;

and;

Technology,;

2266-98,;

Anagahora,;

Shimoshidami,Moriyama-ku;

Nagoya;

463-8560,;

Japan;

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

China;

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

China;

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

China;

National;

Institute;

of;

Advanced;

Industrial;

Science;

and;

Technology,;

2266-98,;

Anagahora,;

Shimoshidami,Moriyama-ku;

Nagoya;

463-8560,;

Japan;

College;

of;

Materials;

Science;

and;

Engineering,;

Hohai;

University,;

Nanfing;

210098,;

C;

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原文格式 PDF
正文语种 CHI
中图分类 TF845-55;
关键词
magnesium; alloys; ECAP; (equal-channel; angular; pressing); corrosion; behavior; SPD; (severe; plastic; deformation); UFG; (ultrafine; grained); rare; earths;

机译：镁;合金;ECAP;（等通道;角;压制）;腐蚀;性能;SPD;（严重;塑性;变形）;UFG;（超细;粒状）;稀有;地球;

Improving corrosion resistance of RE-containing magnesium alloy ZE41A through ECAP

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