Hydrogen diffusion-induced crystallographic changes in α plus β titanium alloy

被引：1
作者：
Wang, Qian [1 ]
Hu, Jianan [1 ,2 ]
Weng, Hanbo [1 ,2 ]
Zhang, Tong [1 ,2 ]
Yang, Lufeng [3 ,4 ]
Chen, Jie [3 ,4 ]
Huang, Sensen [1 ]
Qi, Min [1 ]
Ma, Yingjie [1 ,2 ,5 ]
Xu, Daokui [6 ]
Lei, Jiafeng [1 ,2 ]
Yang, Rui [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[4] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
[5] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[6] Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
来源：
SCRIPTA MATERIALIA | 2025年 / 256卷
关键词：
Titanium alloy; Hydrogen diffusion; Neutron imaging; Spinodal decomposition; Hydride transformation; HYDRIDE PRECIPITATION; MECHANISM;
D O I：
10.1016/j.scriptamat.2024.116410
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Hydrogen absorption can cause crystallographic changes in both alpha and beta phase of Ti alloy. To understand them better, the hydrogen diffusion behavior in Ti-5Al-5Mo-2V-2Cr-2Sn-2Zr dual-phase Ti alloy is investigated based on multi-scale characterization. The hydrogen distribution change of electrochemical hydrogen charging sample during aging at room temperature is characterized by neutron imaging technique. The hydride decomposition and hydrogen induced cracking are observed by interrupted in-situ method. Besides, the spinodal decomposition structure is observed in beta phase, which is widened by large lattice expansion due to hydrogen absorption. Finally, the interface of delta-hydride/alpha-Ti with the orientation relationship of {0001}alpha//{001}delta <12<overline>10>alpha//<110>delta is investigated. A new periodic structure formed by {101<overline>0} stacking faults is identified as intermediate state of hydride transformation.
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页数：6
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