Severe Plastic Deformation Induced Sensitization of Cryo-milled Nanocrystalline Al-7.5 Mg

被引：0
|
作者：
Ramasis Goswami
Peter S. Pao
Syed B. Qadri
Ronald L. Holtz
机构：
[1] Naval Research Laboratory,Materials Science and Technology Division
来源：
Metallurgical and Materials Transactions A | 2014年 / 45卷
关键词：
HRTEM; Friction Stir Weld; Stress Corrosion Crack; Severe Plastic Deformation; Intergranular Corrosion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Transmission electron microscopy (TEM) was employed to investigate the sensitization behavior in nanocrystalline Al-7.5 pct Mg synthesized by cryomilling and hot isostatic pressing. High-resolution TEM reveals the formation of β phase in as-extruded condition as well as in aged condition. Grain boundaries are enriched with Mg during milling as a result of flux of defects, such as vacancy and dislocations that are strongly coupled to Mg atoms, to grain boundaries. It is suggested that sensitization is enhanced due to severe plastic deformation during high energy ball milling.
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页码：2894 / 2898
页数：4
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