Enhancing corrosion resistance through crystallographic texture control in additively manufactured superelastic NiTi alloy

被引：0

作者：

Zhu, Jia-Ning ^{[1
]}

Li, Ziyu ^{[1
]}

Rahimi, Ehsan ^{[1
]}

Yan, Zhaorui ^{[1
]}

Ding, Zhaoying ^{[1
]}

Mol, Arjan ^{[1
]}

Popovich, Vera ^{[1
]}

机构：

[1] Delft Univ Technol, Dept Mat Sci & Engn, Mekelweg 2, NL-2628 CD Delft, Netherlands

来源：

CORROSION SCIENCE | 2025年 / 251卷

关键词：

NiTi alloy; Corrosion; Additive manufacturing; Crystallographic texture; PASSIVE FILM; INITIATION SITES; MICROSTRUCTURE; SKPFM;

D O I：

10.1016/j.corsci.2025.112929

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NiTi alloys, widely used for their shape memory and superelastic properties, face corrosion challenges when fabricated via laser powder bed fusion (LPBF). This study investigates the dual-phase formation in LPBF NiTi and its impact on corrosion resistance. Thermal simulations and microstructural analysis reveal that thermal stress drives martensite formation near melt pool boundaries. Martensitic regions act as anodic sites, leading to localized corrosion. Optimizing LPBF parameters produced single-phase [001]-textured NiTi, eliminating martensite and significantly reducing the corrosion current by almost two orders of magnitude and enhancing superelastic performance simultaneously. These findings highlight texture control as a key strategy to improve corrosion resistance and functionality for advanced applications.

引用

页数：11

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