THE EFFECT OF HEAT-TREATMENT ON THE ELASTIC AND DISSIPATIVE PROPERTIES OF COPPER WITH THE SUBMICROCRYSTALLINE STRUCTURE

被引：120

作者：

AKHMADEEV, NA ^{[1
]}

KOBELEV, NP ^{[1
]}

MULYUKOV, RR ^{[1
]}

SOIFER, YM ^{[1
]}

VALIEV, RZ ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI, INST SOLID STATE PHYS, MOSCOW 142432, RUSSIA

来源：

ACTA METALLURGICA ET MATERIALIA | 1993年 / 41卷 / 04期

关键词：

D O I：

10.1016/0956-7151(93)90153-J

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of the heat treatment on the attenuation and velocity of sound waves of different types, measured at frequencies approximately 15 Hz, 100 kHz and 5 MHz, has been studied in submicrocrystalline copper of different purity. The samples with grain size of 0.2 mum were obtained by equichannel angular pressing method. A drastic irreversible increase of velocity values after annealings above some characteristic temperature T0 was observed. T0, according to electron microscopy studies, coincided with the temperature of primary recrystallization. The temperature dependences of sound velocity and internal friction in as-prepared samples display the internal friction peak and corresponding sound velocity jump near T0, the peak temperature being independent of frequency. The results obtained are considered in terms of models which describe the influence of structure defects on the elastic and dissipative properties of crystals.

引用

页码：1041 / 1046

页数：6

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