【摘 要】
：
The uniaxial tensile deformation behavior of a sandwich-like structural TiNb-NiTi composite was inves-tigated by uniaxial tensile test and in situ high-energy synchrotron X-ray diffraction (SXRD).It is found that below 1.2％ macroscopic strains,the elastic
【机 构】
：
School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Zhenjiang Key
论文部分内容阅读
The uniaxial tensile deformation behavior of a sandwich-like structural TiNb-NiTi composite was inves-tigated by uniaxial tensile test and in situ high-energy synchrotron X-ray diffraction (SXRD).It is found that below 1.2％ macroscopic strains,the elastic deformations of the B2,β,B19\'and α“ phases take place in the TiNb-NiTi composite.During the subsequent loading,the β → α” and B2 → B19\'stress-induced martensitic trans-formations (SIMTs) occur within the macroscopic strains of 0.5％-4.2％ and the macroscopic strains of 0.7％-6.2％,respectively.At the macroscopic strain of about 4.2％,the outer TiNb layer of the TiNb-NiTi composite experiences a partial fracture,as proved by the disappearance of (040)α\"and a sudden jump in the (110)B19\'d-spacing caused by load transfer.With further uniaxial tensile deformation,the TiNb-NiTi composite finally fractures at a strain of ～ 6.2％.Our results might provide some valuable information for under-standing the deformation behavior of novel sandwich-like structural shape memory composites in more depth.
其他文献
The shape-dependent performance of metal co-catalysts in photocatalysis has been one of the research focal points in recent years.In this study,PtPd/C3N4 hybrid structures were constructed to reveal the effect of the shape of the PtPd bimetallic co-cataly
Surface Ag granular packs (SAgPs) have been fabricated from dual-phase Ag35.5Zn64.5 precursor alloy consisting of both ε and γ phases by using a facile one-step triangle wave potential cycling in 0.5 mol·L-1 KOH.During the continuous potential cyclic swee
Mn-doped ZnO samples,Zn1-xMnxO (x =0,0.01,0.03 and 0.05;mole fraction),were successfully synthesized by sonochemical method.The undoped and Mn-doped ZnO samples were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission
Coaxial FezO3/TiO2 nanotubes (Fe2O3/TiO2 NTs) were prepared by two anodic oxidation processes.The synthesized Fe2O3/TiO2 NTs catalysts showed high photocatalytic activity in heterogeneous photo-Fenton system.With the help of Fe2O3/TiO2 NTs,4-nitrophenol(1
Although Ni-Ti-O nanopores (NPs) can be fabricated by anodization of mechanically polished NiTi alloys,the top disordered layer is difficult to remove thus hindering the functionality of the Ni-Ti-O NPs.In this work,an electropolishing (EP) pretreatment w
The present work introduces a novel γ\'phase-strengthened Ir-W-Al-Th superalloy for ultrahigh-temper-ature applications.First,the as-cast microstructure and phase transformation of Ir-13W-6Al-0.15Th (at％) alloy during solid solution and aging were inves
It is confirmed that the solid solution tempera-ture range to obtain optimal magnetic properties is different for the magnets with different Fe contents,and the corre-lation between magnetic properties and microstructures influenced by solid solution temp
The aim of this study is to develop processing maps based on two models and compare them with con-ventional processing maps.The hyperbolic sinus constitu-tive equation and artificial neural network (ANN)approaches were used in this investigation to predic
High strength titanium alloys suffer from a limited combination of strength and ductility.Considering their microstructure,the coarse β grain is a detrimental factor.In the present study,the effects of hot deformation and annealing treatment on the β grai