Bond durability and deterioration mechanism of NiTi SMA-to-steel interface in simulated pipeline sediment

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-20 DOI:10.1016/j.tws.2026.114683

Jun Deng , Min-Ting Zhong , Jun-Bo Liang , Zong-Chao Liu , Bo Guo , Hui-Qiang Li , Dong Guo

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Abstract

This study investigated the feasibility of using nickel-titanium shape memory alloy (NiTi SMA) to strengthen steel pipelines by evaluating the long-term bond performance under oil and gas pipeline sediment conditions. Four groups of single-lap shear NiTi SMA-to-steel joints were fabricated using optimized surface preparation protocols, with three replicates per group. The joints were then immersed in a synthetic pipeline sediment solution for periods of 30, 60, and 90 days to simulate actual operational conditions. Following immersion, lap-shear tests were conducted to assess the bond performance variations. Bond strength increased from 0 to days, likely due to continued curing of the adhesive, but decreased thereafter because of corrosion. Additionally, interfacial shear stress distributions and bond-slip behaviors were derived from the measured strain profiles along the NiTi SMA, accounting for its nonlinear stress-strain response. Furthermore, SEM, EDS, FTIR, and XPS analyses were performed to investigate the microscopic morphology and chemical structure variations of the bonding interface. These analyses revealed that bond deterioration was attributed to the hydrolytic cleavage, radical-induced crosslinking, and ingress of corrosive ions.

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模拟管道沉积物中NiTi sma -钢界面耐久性及劣化机制

本研究通过评估油气管道沉积条件下镍钛形状记忆合金（NiTi SMA）的长期粘结性能，探讨了镍钛形状记忆合金（NiTi SMA）加固钢管道的可行性。采用优化后的表面处理方案制备了4组单搭接剪切NiTi sma -钢接头，每组3个重复。然后将接头浸入合成管道沉积物溶液中30、60和90天，以模拟实际操作条件。浸泡后，进行了剪切试验，以评估粘结性能的变化。粘结强度从0天增加到几天，可能是由于粘合剂的持续固化，但此后由于腐蚀而下降。此外，根据实测应变曲线推导了NiTi SMA的界面剪切应力分布和粘-滑行为，说明了其非线性应力-应变响应。利用SEM、EDS、FTIR和XPS等分析手段研究了键合界面的微观形貌和化学结构变化。这些分析表明，键的恶化是由于水解解理，自由基诱导交联和腐蚀离子的进入。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.