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Article
Nanoscience & Nanotechnology
Rui Xi et al.
Summary: NiTiNb alloys were fabricated through L-PBF with powder mixtures of prealloyed NiTi and elemental Nb powders. The addition of Nb significantly altered the dependence of MTTs on L-PBF process parameters. The net effect of Nb addition is to lower MTTs, while Ni evaporation has the opposite effect. In NiTiNb3 alloys, factors that promote and suppress MTTs are almost completely compensated, resulting in a rather stable MTT despite variations in L-PBF process parameters.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Peikang Bai et al.
Summary: In this study, IN718 alloy was manufactured using selective laser melting, and the effects of solution and double aging treatments on its microstructure and mechanical properties were investigated. The results showed that increasing the solution temperature promoted grain recrystallization and the formation of a nanoscale granular composite phase, resulting in enhanced strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Zezhou Xu et al.
Summary: This paper investigates the effect of rare earth oxide CeO2 on the properties of NiTi alloys prepared by laser powder bed fusion. The results show that different amounts of CeO2 significantly affect the transition temperatures, shape memory effect, and mechanical strength of the alloys. The addition of an appropriate amount of CeO2 promotes the grain order and improves the mechanical properties of the alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Shifeng Liu et al.
Summary: A novel mesh eutectic composite microstructure was prepared in a NiTiNb alloy, leading to excellent mechanical performance and superelastic recovery. The accelerated martensite transformation, improved mechanical properties, and enhanced superelastic recovery were attributed to the presence of multiple dislocations and nanoscale precipitates in the interface region. The mesh eutectic phase also played a role in impeding slippage migration and promoting plasticity.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Orsolya Molnarova et al.
Summary: An experimental method is introduced for reconstructing martensite variant microstructures in nanocrystalline NiTi wire. It was found that the martensitic microstructures in the wire transform to different states upon loading and unloading, leading to characteristic microstructures with recoverable and unrecovered strains. The study also shows that the plastic deformation of oriented martensite proceeds by coordinated deformation twinning and dislocation slip, resulting in a refinement of the austenitic microstructure.
Article
Materials Science, Multidisciplinary
H. Z. Lu et al.
Summary: A stable tensile recovery strain induced by a Ni4Ti3 nanoprecipitate in a Ni50.4Ti49.6 shape memory alloy fabricated via selective laser melting was reported. The heat-treated SMA exhibited a larger strain/stress field inside the grain interior region and showed three-stage phase transformation. The results provide insights into tailoring the microstructure and functional properties of NiTi SMAs by SLM.
Article
Materials Science, Multidisciplinary
Yuanwei Song et al.
Summary: The study introduces a Ni50.8Ti49.2 alloy with ultrahigh damping capacity achieved through a combination of severe deformation, insufficient annealing, and low-temperature aging. The high broad internal friction plateau in this alloy is attributed to the presence of nanodomains, stable coexistence of B19'-phase and R-phase, abundant phase boundaries, and movable interfaces. The critical role of low-temperature aging in inducing nanodomains and the generation of high-density nanodomains through insufficient annealing and low-temperature aging processes are confirmed.
Article
Materials Science, Multidisciplinary
Qiao Li et al.
Summary: Controlled cross rolling (CroR) can achieve in-plane low coefficients of thermal expansion (CTEs) of polycrystalline NiTi sheets, significantly reducing CTEs close to zero over a wide temperature range. The physical mechanism behind the in-plane low TE is explored through in situ neutron diffraction and a theoretical model, offering a new pathway for obtaining shape memory alloys (SMAs) with low thermal expansion properties.
Article
Nanoscience & Nanotechnology
Xiebin Wang et al.
Summary: This work reports anomalous phenomena in superelastic cycling of NiTi shape memory alloys near the temperature border, including higher critical stress, plateau stress changes, and transition from good superelasticity to fully irreversible strain, which may be caused by defects generated during the first superelastic cycle near the border impeding stress-induced martensitic transformations.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Composites
Xiaoyang Yi et al.
Summary: In this study, in-situ TiB whiskers and La2O3 particles with network structure were designed and introduced into Ti-Ni composites. As the LaB6 content increases, the amounts of in-situ TiB whiskers and La2O3 particles also increase in the composites. The mechanical properties of the composites first decrease and then increase with the increasing LaB6 content.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
L. Xue et al.
Summary: Laser Powder Bed Fusion (L-PBF) was used to fabricate fully dense NiTi shape memory alloy (SMA) parts with excellent mechanical properties, and a process optimization framework was employed to determine the optimal processing parameters for achieving full density parts.
Article
Materials Science, Ceramics
Zhanyong Zhao et al.
Summary: In-situ nanoscale TiC particles reinforced Ti6Al4V composites were prepared by selective laser melting, with a focus on the microstructure and interface bonding. TiC effectively pinned dislocations, refined grains, and increased the hardness of the alloy, resulting in enhanced mechanical properties of the composites.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Multidisciplinary
Youwen Yang et al.
Summary: In this study, cerium was alloyed with biodegradable Zinc using laser additive manufacturing technique, which effectively improved the mechanical properties and creep resistance. The Zn-Ce alloy exhibited significantly enhanced ultimate tensile strength and reduced creep rate, along with strong antibacterial activity, favorable cytocompatibility, and hemocompatibility, showing promising potential as a candidate for bone repair applications.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Fang Wang et al.
Summary: This study found that the damage response of NiTi alloy is influenced by grain size, with smaller grain sizes leading to intergranular and transgranular fracture, while larger grain sizes resulted in intergranular-dominated fracture. The results also showed that as the grain size increased, stress relaxation became more complete, leading to faster void growth rate.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
O. Benafan et al.
Summary: The development of melting and processing techniques for NiTiHf high-temperature shape memory alloys at the laboratory scale has shown significant success and repeatability. Different melting techniques used to process the alloys resulted in slightly different compositions that affected the mechanical and functional properties of the alloys. Experimentation with various melting techniques allowed for adjustments in the melting process to optimize alloy properties.
SHAPE MEMORY AND SUPERELASTICITY
(2021)
Article
Materials Science, Multidisciplinary
Ping Qiu et al.
Article
Optics
Bingwen Lu et al.
OPTICS AND LASER TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Fangxia Ye et al.
JOURNAL OF CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
Zhen Sun et al.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Soheil Saedi et al.
Article
Chemistry, Physical
Jie Deng et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Nanoscience & Nanotechnology
Mohammad Elahinia et al.
SCRIPTA MATERIALIA
(2018)
Article
Materials Science, Multidisciplinary
Ausonio Tuissi et al.
SHAPE MEMORY AND SUPERELASTICITY
(2016)
Article
Materials Science, Multidisciplinary
J. Frenzel et al.
Article
Electrochemistry
N. Figueira et al.
ELECTROCHIMICA ACTA
(2009)
