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Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy
- NUCLEAR TECHNIQUES Vol. 41, Issue 2, Article number: 020501(2018)
- 作者机构：
1.东华理工大学 核科学与工程学院 南昌 330013
2.中国科学院高能物理研究所 多学科研究中心 北京 100049
- 作者简介：
- 基金信息：National Natural Science Foundation of China;National Natural Science Foundation of China;National Natural Science Foundation of China;Beijing Natural Science Foundation of China
DOI：10.11889/j.0253-3219.2018.hjs.41.020501
CLC： TG156.9Received：18 October 2017，
Revised：17 November 2017，
Published：10 February 2018
- 稿件说明：
移动端阅览
Jianbing LUO, Peng ZHANG, Te ZHU, et al. Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy[J]. Nuclear techniques, 2018, 41(2): 020501
Jianbing LUO, Peng ZHANG, Te ZHU, et al. Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy[J]. Nuclear techniques, 2018, 41(2): 020501 DOI： 10.11889/j.0253-3219.2018.hjs.41.020501.
摘要
铁基合金中的氢致缺陷是造成合金机械性能恶化的重要因素之一。氢对材料中微观组织结构的影响，特别是氢致缺陷微观机理的研究是铁基合金的一个基础研究课题。本文主要应用正电子湮没寿命谱（Positron Annihilation Lifetime Spectroscopy，PALS）和符合多普勒谱（Coincidence Doppler Broadening Spectrum，CDB）方法，研究了不同处理条件的Fe-1.0% Cu合金样品充氢过程中氢致缺陷的形成机制、缺陷类型以及氢与缺陷的相互作用及其微观机理等。结果表明，1073 K高真空热处理和20%形变后723 K退火处理的样品充氢后会产生少量的位错，而1173 K高真空淬火样品充氢后还会产生少量的空位团，在充氢过程中空位缺陷成为氢的捕获点，并与氢相互作用成为聚集空位的核心而形成空位团。CDB结果还表明，Cu析出物对本文合金样品的氢致缺陷的形成无明显影响。
Abstract
Background
2
Hydrogen damage has always been an important research topic in ferrous alloys
and hydrogen induced defects are important factors leading to mechanical deterioration.
Purpose
2
This paper aims to study types of hydrogen induced defects in the hydrogen-charged Fe-1.0%Cu alloy.
Methods
2
Positron annihilation lifetime spectroscopy and coincidence Doppler broadening spectrum were used.
Results
2
Positron annihilation long lifetime (
τ
2
) of hydrogen-charged specimen annealed at 1073 K for 2 h and 723 K after being cold-rolled was 127.5ps and 124.1 ps
while that quenched before and after being hydrogen-charged was 171.5 ps and 241 ps. And the parameter S increased slightly for hydrogen-charged specimen after being annealed
while that quenched evidently increase due to the presence of vacancy which might interact with hydrogen
leading to the formation of vacancy clusters. The coincidence Doppler broadening (CDB) results show that in the low-momentum region
the ratio curves of the samples after being hydrogen-charged was higher than that before.
Conclusion
2
The results suggest that the types of hydrogen induced defects are related to the state of the samples before being hydrogen-charged. And Cu precipitates have no direct effect on the formation of hydrogen induced defects.
关键词
Keywords
references
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