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that the rate controlling mechanism for V-5Cr-5Ti alloy compressed in ranges of 1373-1673 K and 0.001-1.0 s-1 is the dislocation climb by overcoming of forest dislocations. Key words: V-5Cr-5Ti alloy; hot compression; thermal activation; dislocation climb 1 Introduction Researches on the high temperature deformation mechanism of V-Cr-Ti alloy, which has been investigated as the potential fusion reactor......
that the dislocation climb controlled creep is the dominant creep mechanism and it is not affected by the semi solid processing and further addition of Mg. Mg improves the alloy creep properties probably...; dislocation climb controlled creep 1 Introduction Among the Al based casting alloys, Al-Si-Mg alloys are the most widely used alloys in aerospace and automotive industries because of the good casting......
is that it keeps a high volume fraction of γ′ phase. Keyword: single crystal nickel base superalloys; alloying elements; creep resistance; dislocation climb...图5可看到, 有多组位错同时通过割阶沿位错线运动而实现攀移, 每条位错线有多个攀移割阶. 由于高温割阶处于热平衡状态, 攀移的激活能 图5 位错攀移的组织形貌 Fig.5 Morphology of dislocation climb 为 [9] U=Uf+Ud+Ui (1) 式中 Uf-空位形成......
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Alloy design by dislocation engineeringM.X.Huang,B.B.HeDepartment of Mechanical Engineering, The University of Hong Kong摘 要:Ultra-high strength alloys... composition(atomic length scale) or manipulating ultra-fine and nano-grained microstructure(grain length scale). The intermediate length scale between atomic and grain scales is the dislocation length scale......
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Evolution of dislocation cells during plastic deformation ZHOU Zhi-min(周志敏)1, SUN Yan-rui(孙艳蕊)1, ZHOU Hai-tao(周海涛)2 (1. College of Science, Northeastern University, Shenyang 110004, China; 2... understood. It is still an unsolved question whether or not finer grain sizes down to 100nm could be reached. A semi-quantitative model for the evolution of dislocation cells in plastic deformation......
Low Energy Dislocation Structure in Deformed Metals刁小雪,邢修三Department of Applied Physics,Beijing Institute of Science and Technology,Beijing,100081,China.摘 要:<正> In this paper,the dislocation distribution struc-ture in deformed metal is discussed.The flow stressof material for the heterogeneous dislocation distri-bution which tends to the flow......
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