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

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2024-10-28 DOI:10.1016/j.scriptamat.2024.116410

Qian Wang , Jianan Hu , Hanbo Weng , Tong Zhang , Lufeng Yang , Jie Chen , Sensen Huang , Min Qi , Yingjie Ma , Daokui Xu , Jiafeng Lei , Rui Yang

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引用次数: 0

Abstract

Hydrogen absorption can cause crystallographic changes in both α and β 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 β phase, which is widened by large lattice expansion due to hydrogen absorption. Finally, the interface of δ-hydride/α-Ti with the orientation relationship of

{0001} α / / {001} δ

< 1 \bar{2} 10 > α / / < 110 > δ

is investigated. A new periodic structure formed by {

10 \bar{1} 0

} stacking faults is identified as intermediate state of hydride transformation.

Abstract Image

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氢扩散诱导的 α + β 钛合金晶体学变化

吸氢会导致钛合金的 α 和 β 相发生结晶学变化。为了更好地理解它们，本文基于多尺度表征研究了 Ti-5Al-5Mo-2V-2Cr-2Sn-2Zr 双相钛合金中的氢扩散行为。利用中子成像技术表征了室温老化过程中电化学充氢样品的氢分布变化。采用间断原位法观察了氢化物分解和氢致裂纹。此外，在 β 相中观察到了旋光分解结构，由于吸氢导致晶格膨胀，该结构变宽。最后，研究了取向关系为 {0001}α//{001}δ <12¯10>α//<110>δ 的 δ-hydride/α-Ti 界面。由{101¯0}堆叠断层形成的新周期结构被确定为氢化物转化的中间状态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.