Nano-creep behavior of Ti-based bulk amorphous alloy after electrochemical hydrogen charging

被引：0

作者：

Dong, Fuyu ^{[1
]}

Zhou, Guishen ^{[1
]}

Hu, Yuanhong ^{[1
]}

Zhang, Yue ^{[1
]}

Liu, Kun ^{[1
]}

Wang, Binbin ^{[2
]}

Luo, Liangshun ^{[2
]}

Su, Yanqing ^{[2
]}

Yuan, Xiaoguang ^{[1
]}

Kuang, Peng

Zhang, Peng

Cao, Xingzhong ^{[3
]}

Cheng, Jun ^{[4
]}

机构：

[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Multi discipline Res Div, Beijing 100049, Peoples R China

[4] Northwest Inst Nonferrous Met Res, Shaanxi Key Lab Biomed Met Mat, Xian 710016, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2025年 / 101卷

基金：

黑龙江省自然科学基金; 美国国家科学基金会; 中国国家自然科学基金;

关键词：

Ti-based amorphous alloy; Electrochemical hydrogen charging; Nanoindentation; Creep; Positron annihilation; SHEAR TRANSFORMATION ZONES; METALLIC-GLASS; PLASTIC-DEFORMATION; INDENTATION CREEP; FLOW; NANOINDENTATION; RELAXATION; HETEROGENEITIES; EVOLUTION; SIZE;

D O I：

10.1016/j.ijhydene.2024.12.450

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the present study, a Ti32.85Zr30.21Cu9Ni5.28Be22.66 bulk amorphous alloy was hydrogenated by the electrochemical method. Samples with different H content were obtained by changing the H-charging current density and charging time. X-ray diffraction (XRD), nanoindentation, and positron annihilation experiments were used to investigate the amorphous structure, nanomechanical properties, and positron annihilation behavior of the Ti32.85Zr30.21Cu9Ni5.28Be22.66 bulk amorphous alloy after electrochemical hydrogenation treatment. XRD analysis showed that the sample has an amorphous structure after hydrogen charging. Investigation of the nano-creep behavior using a nanoindentation instrument demonstrated that the creep displacement of the amorphous alloy decreases gradually with the increase of hydrogen content, and the creep stress index increases first and then decreases. The addition of hydrogen atoms inhibits the formation of the shear transformation zone (STZ), resulting in a decrease in the size and dimensions of STZ in the amorphous alloy and an increase in the activation energy. Three lifetime components were observed in the uncharged and charged samples, indicating the presence of three size ranges of open volume sites. The average annihilation lifetime of positrons decreases with the increase of current density and time of electrochemical hydrogen charging, indicating that the addition of hydrogen weakens the annihilation behavior of positrons. The defect range of the corresponding amorphous alloy decreases, making the creep behavior difficult to carry out. Compared with the uncharged hydrogenated sample, the Doppler broadening spectra showed that the hydrogenated sample contributes more to the positron annihilation of the core electrons, that is, the W parameter becomes larger and the S parameter becomes smaller. Although the addition of hydrogen affects the positron annihilation behavior, no new defects are generated in the amorphous alloy.

引用

页码：529 / 537

页数：9

共 32 条

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