动态塑性变形对商用纯钛微观结构和氢致开裂行为的影响

doi:10.11902/1005.4537.2025.134

中国腐蚀与防护学报

2026, Vol. 46

Issue (2): 583-589 CSTR: 32134.14.1005.4537.2025.134 DOI: 10.11902/1005.4537.2025.134

研究报告

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动态塑性变形对商用纯钛微观结构和氢致开裂行为的影响

李兴斌¹^,², 雷蕴博², 高栋², 于泽³, 董福宇¹, 周宇²(

)

^1.沈阳工业大学材料科学与工程学院沈阳 110870
^2.中国科学院金属研究所沈阳材料科学国家研究中心沈阳 110016
^3.中航沈飞股份有限公司沈阳 110850

Effect of Dynamic Plastic Deformation on Microstructure and Hydrogen-induced Cracking Behavior of Commercially Pure Titanium

LI Xingbin¹^,², LEI Yunbo², GAO Dong², YU Ze³, DONG Fuyu¹, ZHOU Yu²(

)

^1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
^2.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^3.AVIC Shenyang Aircraft Company Limited, Shenyang 110850, China

引用本文:

李兴斌, 雷蕴博, 高栋, 于泽, 董福宇, 周宇. 动态塑性变形对商用纯钛微观结构和氢致开裂行为的影响[J]. 中国腐蚀与防护学报, 2026, 46(2): 583-589.
Xingbin LI, Yunbo LEI, Dong GAO, Ze YU, Fuyu DONG, Yu ZHOU. Effect of Dynamic Plastic Deformation on Microstructure and Hydrogen-induced Cracking Behavior of Commercially Pure Titanium[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(2): 583-589.

全文: PDF(12676 KB) HTML

摘要:

Ti的比强度高、耐蚀性好，然而在含H环境服役时存在较高的氢脆敏感性。Ti的氢脆主要由晶内及晶界上析出的脆性氢化物开裂所致。Ti的氢化物是H通过扩散作用与Ti原子结合而形成。本研究在液氮温度下对商用纯钛TA1进行动态塑性变形(DPD)，利用低能量界面抑制了H的扩散和氢化物的形核，在显著提高材料强度的同时，降低了其氢脆敏感性。研究表明，经过DPD变形后TA1表面氢化物层的厚度明显降低，并且氢化物更为细小。DPD诱导的微观结构细化有效抑制了应变局域化，并降低了Ti基体与氢化物层之间的强度差异，为改善Ti在含氢环境下的使役行为提供了新的思路。

关键词 ： TA1, 动态塑性变形, 氢化物, 氢致开裂

Abstract：

Titanium is known for its high specific strength and excellent corrosion resistance. However, it is particularly sensitive to hydrogen embrittlement in hydrogen-containing environments. This sensitivity arises mainly due to the formation of brittle hydrides within the grains and along the grain boundaries. Titanium hydrides are formed when hydrogen combines with Ti-atoms through a diffusion process. In this study, commercial pure titanium TA1 plate was subjected to dynamic plastic deformation (DPD) at liquid nitrogen temperature. The aim was to suppress the hydrogen diffusion and the hydride nucleation through low-energy interfaces, thereby significantly enhancing the strength of material and reducing its sensitivity to hydrogen embrittlement. The results indicated that after DPD deformation, the thickness of the hydride layer on the surface of TA1 was drastically reduced, and the hydrides became finer. Furthermore, the microstructural refinement induced by DPD effectively suppressed strain localization and diminished the strength disparity between the titanium matrix and the hydride layer. These findings provide a novel route for enhancing the performance of titanium in hydrogen-containing environments.

Key words： TA1 dynamic plastic deformation hydrides hydrogen-induced cracking

收稿日期: 2025-05-02 32134.14.1005.4537.2025.134

ZTFLH:

TG146.2

通讯作者: 周宇，E-mail：yzhou@imr.ac.cn，研究方向为纳米金属材料环境敏感断裂

作者简介: 李兴斌，男，1997年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.134 或 https://www.jcscp.org/CN/Y2026/V46/I2/583

图1 DPD装置及样品观察方向

图2 TA1粗晶和动态塑性变形样品的EBSD结果

Type of twin	Misorientation angle and axis	Frequency of twin
{11 $2 ¯$ 2}	64.4°<10 $1 ¯$ 0>	20.7%
{10 $1 ¯$ 2}	85°<1 $2 ¯$ 10>	7.04%
{11 $2 ¯$ 3}	86.8°<1 $2 ¯$ 10>	6.84%
Total	-	34.58%

表1 动态塑性变形样品中孪晶界的比例

图3 粗晶和动态塑性变形样品充氢前后的工程应力应变曲线

表2 粗晶和动态塑性变形样品充氢前后的力学性能指标和IHE

图4 TA1粗晶和动态塑性变形样品样品充氢前后的XRD结果

图5 粗晶和动态塑性变形样品充氢后的相分布图、反极图和位错密度分布

图6 粗晶和动态塑性变形样品充氢前后的TEM明场像

图7 粗晶和动态塑性变形样品充氢前后的表面硬度

图8 粗晶和动态塑性变形样品充氢前后的断口形貌

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