Deformation and Slip Behaviour of Cold-Worked Molybdenum Single Crystals at Elevated Temperature I. The Effect of Crystals Orientation
作者： A. Luft , Ch. Ritschel
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摘要: Molybdenum single crystals of the axis orientations [941], [221], [110], and [100] are deformed in tension first at low temperatures (T1 = 173 K) subsequently elevated (T2 493 K). Work softening, discontinuous yielding, localized slip found to be characteristic phenomena postdeformation inherently connected with formation soft channels hard dislocation structure. Strain-hardening zones leads an homogenization large plastic elongations. Orientation effects attributed differences pre-formed distribution different number geometry systems activated during restraining temperatures. Molybdaneinkristalle mit Achsorientierungen [110] und werden zuerst bei tiefer Temperatur danach erhohter zugverformt. Charakteristische Erscheinungen der Nachverformung sind Verformungsentfestigung, diskontinuierliches Fliesen lokalisiertes Gleiten, die alle Bildung hindernisversetzungsfreier Gleitkanale zusammenhangen. Die Verfestigung aktiven Gleitzonen fuhrt zur Homogenisierung Gleitung grosen Dehnungen. Orientierungseffekte auf Unterschiede Vorverformungsstruktur Anzahl Geometrie aktivierten Gleitsysteme zuruckgefuhrt.
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