SOLUTION HARDENING IN AL-ZN ALLOYS - MEAN JUMP DISTANCE AND ACTIVATION LENGTH OF MOVING DISLOCATIONS

被引：19

作者：

DEHOSSON, JTM ^{[1
]}

BOOM, G ^{[1
]}

SCHLAGOWSKI, U ^{[1
]}

KANERT, O ^{[1
]}

机构：

[1] UNIV DORTMUND,INST PHYS,D-4600 DORTMUND 50,FED REP GER

来源：

ACTA METALLURGICA | 1986年 / 34卷 / 08期

关键词：

ALUMINUM METALLOGRAPHY - Lattice Defects - MAGNETIC RESONANCE - Applications;

D O I：

10.1016/0001-6160(86)90102-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Pulsed nuclear magnetic resonance is a complementary new technique for the study of moving dislocations in Al-Zn alloys. The NMR technique, in combination with strain-rate change experiments and transmission electron microscopy have been applied to study dislocation dynamics in Al-Zn alloys (1-21 at%Zn). Spin-lattice relaxation measurements indicate that fluctuations in the quadrupolar field caused by moving dislocations are different compared to those in ultra-pure Al. Moving dislocations advance over a number of solute atoms (order to 10) as described by Mott-Nabarro's model and interact with forest dislocations as predicted by Friedel's model. The strain rate change experiments confirm the linear additivity of flow stresses and the additivity of inverse activation length.

引用

页码：1571 / 1581

页数：11

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