Dislocation mobility in gum metal β-titanium alloy studied via in situ transmission electron microscopy

被引：49
|
作者：
Castany, Philippe [1 ]
Besse, Magali [1 ]
Gloriant, Thierry [1 ]
机构：
[1] INSA Rennes, UMR CNRS 6226, F-35708 Rennes 7, France
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 02期
关键词：
DEFORMATION; MECHANISMS; EVOLUTION; BEHAVIOR; STRESS; ENERGY;
D O I：
10.1103/PhysRevB.84.020201
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In situ tensile tests in a transmission electron microscope were carried out on a "Gum Metal" beta-titanium alloy. Conventional dislocation slip was observed to be the only mechanism occurring during the plastic deformation. The low mobility of screw dislocations was shown to be due to their core structure configuration. Nanometer-sized obstacles were also present but have a weaker effect on the dislocation mobility. The density of these obstacles and the variation in energy due to the core structure of screw dislocations were measured and compared to theoretical data in the literature.
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页数：4
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