Constructing the discrete gradient structure for enhancing interfacial bond strength of Ti6Al4V/NiTi heterostructured materials

被引：1
作者：
Li, Xingran [1 ,2 ]
Li, Qiang [1 ]
Nie, Minghao [1 ,2 ]
Jiang, Pengfei [1 ,2 ]
Yan, Shenghong [3 ]
Jiang, Yue [1 ]
Zhang, Zhihui [1 ,2 ]
机构：
[1] Jilin Univ, Key Lab Bion Engn, Minist Educ, Changchun 130012, Peoples R China
[2] Liaoning Acad Mat, Inst Struct & Architected Mat, Shenyang 110167, Peoples R China
[3] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2025年 / 214卷
基金：
中国国家自然科学基金;
关键词：
SHAPE-MEMORY ALLOYS; MECHANICAL-PROPERTIES; NITI; TI-6AL-4V; MICROSTRUCTURE; JOINTS;
D O I：
10.1016/j.jmst.2024.05.085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study involved the fabrication of defect-free Ti6Al4V/NiTi functional gradient materials (FGMs) using laser-directed energy deposition (LDED). The resulting Ti6Al4V/NiTi FGM showed a varied microstructure with different grain shapes and irregular eutectic structures. As the NiTi content increased, the number and shape of precipitates in various deposited layers underwent significant alterations due to phase transitions. Notably, employing thermodynamic principles, we proposed a discrete FGM strategy by selectively excluding certain composition ranges, resulting in a tensile strength increase of more than 46.3 % compared to continuous FGMs. This study offers a promising approach for developing and optimizing additive manufacturing using heterogeneous structures. © 2024
引用
收藏
页码：266 / 271
页数：6
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