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Исследование температурных интервалов фазовых превращений в многослойных металлических материалах

Исследование температурных интервалов фазовых превращений в многослойных металлических материалах

Abstract

In this paper investigation of the change of temperature ranges of phase transformations in multilayer metal materials based on an analysis of the positions of critical points on the areas of cooling thermograms and data about interlayer redistribution of alloying elements was performed. Studies of samples of the model compositions having various grade of structurization were performed by differential scanning calorimetry. Analysis of the received cooling thermograms showed that for samples of composition, in which there was the retention of the laminar structure up to the layer thickness of 1 mkm, intensive shift of temperature range of γ®α transformation in the low temperature region was observed. In samples of the model composition, in which a breaking of the laminar structure is observed with a layer thickness of 5 mkm, this shift was less significant. On the basis of the obtained data it was concluded that temperature range of existence of the γ-phase affects the structural stability of multilayer materials.

В работе проведено исследование изменения температурных интервалов фазовых превращений в многослойных металлических материалах, основанное на анализе положения критических точек на участках термограмм охлаждения и данных о межслойной диффузии легирующих элементов. Методом дифференциальной сканирующей калориметрии проведены исследования образцов модельных композиций, имеющих различную степень структуризации. Анализ полученных термограмм охлаждения показал, что для образцов композиции (У8+08Х18Н10), в которых наблюдается сохранение ламинарного строения вплоть до толщины слоев равной 1 мкм, наблюдается интенсивное смещение температурного интервала γ®α-превращения в область низких температур. В образцах модельной композиции (У8+08Х18), в которых нарушение ламинарного строения наблюдается при толщине слоя равной 5 мкм, такое смещение оказалось менее значительным. На основании полученных данных сделан вывод о влиянии температурного интервала существования γ-фазы на структурную стабильность многослойных материалов.

Keywords

СЛОИСТЫЕ КОМПОЗИТЫ, МНОГОСЛОЙНЫЕ МЕТАЛЛИЧЕСКИЕ МАТЕРИАЛЫ, ГОРЯЧАЯ ПРОКАТКА, МИКРОСТРУКТУРА, ДИФФУЗИЯ, ФАЗОВЫЕ ПРЕВРАЩЕНИЯ, СТРУКТУРНАЯ СТАБИЛЬНОСТЬ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold