PAT study of defect and electron density in Al-Li-Cu-Mg-Zr alloy under cryogenic temperature

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PAT study of defect and electron density in Al-Li-Cu-Mg-Zr alloy under cryogenic temperature

更新时间：2021-04-09

- PAT study of defect and electron density in Al-Li-Cu-Mg-Zr alloy under cryogenic temperature
- NUCLEAR TECHNIQUES Issue 3, (1996)
- 作者机构：
  
  1. 广西大学
  2. 中国科学院金属研究所
  3. 广西大学中国科学院金属研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG111.2
- Published：01 March 1996
- 稿件说明：
移动端阅览
[1]吴伟明,高英俊,邓文,许少杰,冯冠之,钟夏平,蒋晓军.用正电子湮没技术研究深低温下Al—Li—Cu—Mg—Zr合金中的缺陷和电子密度[J].核技术,1996(03):160-163.

PAT study of defect and electron density in Al-Li-Cu-Mg-Zr alloy under cryogenic temperature[J]. Nuclear techniques, 1996, (3).
[1]吴伟明,高英俊,邓文,许少杰,冯冠之,钟夏平,蒋晓军.用正电子湮没技术研究深低温下Al—Li—Cu—Mg—Zr合金中的缺陷和电子密度[J].核技术,1996(03):160-163. DOI：

PAT study of defect and electron density in Al-Li-Cu-Mg-Zr alloy under cryogenic temperature[J]. Nuclear techniques, 1996, (3). DOI：

摘要

测量了欠时效和峰值时效的Ａｌ—Ｌｉ—Ｃｕ—Ｍｇ－Ｚｒ合金从深低温到室温升温过程的正电子湮没寿命谱．对ｅ＋寿命谱特征参数的分析表明．两种样品中的缺陷在升温过程中的运动规律是相似的。但峰值时效样品比欠时效样品回复缺陷的量更多；缺陷的平均开空间更大．而且随着δ＇（Ａｌ３Ｌｉ）相粒子的长大，样品基体中自由电子密度提高，增加了合金基体的强度．

Abstract

The positron annihilation lifetime spectra of the under-aged and peak-aged Al-Li-Cu-Mg-Zr alloys were measured in the range from cryogenic to room temperature. The positron annihilation lifetime spectra show that the defect behaviours between two samples in the whole process of temperature rising are similar

but amount of the recovered vacancies is much greater in the peak-aged sample than in the under-aged one

and the average open space of defects in the peak-aged one is larger. With the particle δ’（Al3Li） growing in aging

the bulk election density in the alloy is increased and the strength enhanced.

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