Positron annihilation spectroscopy to study nanoprecipitations in aluminum alloys

被引：1
|
作者：
Meyendorf, N [1 ]
Dlubek, G [1 ]
Surkov, A [1 ]
机构：
[1] Univ Dayton, Ctr Mat Diagnost, Dayton, OH 45469 USA
来源：
TESTING, RELIABILITY, AND APPLICATION OF MICRO- AND NANO-MATERIAL SYSTEMS II | 2004年 / 5392卷
关键词：
positron annihilation; nano-precipitations; aluminum alloy; RRA heat treatment;
D O I：
10.1117/12.541360
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Positron Annihilation Spectroscopy has been used to study the microstructure in aluminum alloy AA7075-T6 after RRA (retrogression and re-aging) heat treatment. Nano-precipitates act as traps for thermalised positrons. The measured positron lifetime is sensitive to the local electron density at the annihilation site while the Doppler broadening of the annihilation line is sensitive to the chemical environment of the annihilation site. The combination of both methods was used to study changes of nano-precipitates, during the Retrogression and Re-aging (RRA) process. Results are compared to previous published isochronal annealing experiments of an Al Cu model alloy.
引用
收藏
页码：54 / 62
页数：9
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