应用正电子湮没谱学对Fe-1.0% Cu合金氢致缺陷的研究

doi:10.11889/j.0253-3219.2018.hjs.41.020501

Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (2): 20501-020501.doi: 10.11889/j.0253-3219.2018.hjs.41.020501

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles Next Articles

Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy

LUO Jianbing^1,2, ZHANG Peng², ZHU Te², CAO Xingzhong², ZHANG Huaiqiang¹, JIN Shuoxue², YU Runsheng², WANG Baoyi²

1. School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, China;
2. Multi-discipline Research Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

Received:2017-10-18 Revised:2017-11-17 Online:2018-02-10 Published:2018-02-06
Supported by:
Supported by National Natural Science Foundation of China (No.91026006, No.11675188, No.11665001), Beijing Natural Science Foundation of China (No.1164017)

Abstract

Abstract: [Background] Hydrogen damage has always been an important research topic in ferrous alloys, and hydrogen induced defects are important factors leading to mechanical deterioration. [Purpose] This paper aims to study types of hydrogen induced defects in the hydrogen-charged Fe-1.0%Cu alloy. [Methods] Positron annihilation lifetime spectroscopy and coincidence Doppler broadening spectrum were used. [Results] Positron annihilation long lifetime (τ₂) 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] 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.

Key words: Hydrogen induced defects, Positron annihilation spectroscopy, Vacancy clusters, Dislocations, Fe-1.0% Cu alloy

CLC Number:

TG156.9

LUO Jianbing, ZHANG Peng, ZHU Te, CAO Xingzhong, ZHANG Huaiqiang, JIN Shuoxue, YU Runsheng, WANG Baoyi. Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy[J].Nuclear Techniques, 2018, 41(2): 20501-020501.

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Study of hydrogen induced defects in Fe-1.0%Cu alloy by positron annihilation spectroscopy

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