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首页> 外文期刊>Chinese science bulletin >The in-situ TEM observation of chemisorption facilitating dislocation emission, multiplication and motion
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The in-situ TEM observation of chemisorption facilitating dislocation emission, multiplication and motion

机译：化学吸附的原位TEM观察，促进位错的发射，增殖和运动

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摘要

THE reduction in ductility and fracture stress of many metals tested in certain liquid metal environments is generally known as liquid metal embrittlement (LME). The resistance to fracture R - (a- v~2)K_(IC)~2 (L)/E, calculated by the fracture toughness K_(IC) (L) in LME, is often 1--3 orders of magnitude greater than the surface energy of the material, λ. Orowan's equation of R = 2λ _(eff) = λ + λ _P must be used in considering LME rather than Griffith's equation of R = 2λ, where 7p is plastic work done. The experiments in LME showed that λ _P = (10--1 000) λ. It has been shown that there is localized plastic deformation in brittle failure induced by the chemisorption of liquid metal.
机译：在某些液态金属环境中测试的许多金属的延展性和断裂应力的降低通常称为液态金属脆化（LME）。由LME中的断裂韧性K_（IC）（L）计算得出的抗断裂强度R-（av〜2）K_（IC）〜2（L）/ E通常要大1--3个数量级比材料的表面能λ在考虑LME时必须使用R =2λ_（eff）=λ+λ_P的Orowan方程，而不是R =2λ的格里菲斯方程，其中7p是塑性功。 LME中的实验表明λ_P =（10--1 000）λ。已经表明在液态金属的化学吸附引起的脆性破坏中存在局部塑性变形。

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