Open AccessMicrostructure and mechanical properties of superelastic NiTi fiber reinforced NiTi/(Al3Ti+Al3Ni) metal-intermetallic laminated (SFR-MIL) composites
Author(s) -
Fuwei Kang,
Ximeng Zhang,
Fahong Zhang,
Enhao Wang,
Yang Cao,
Wei Jiang,
Liping Wang,
Yuqiang Han,
Chunfa Lin
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac0558
Subject(s) - materials science , microstructure , composite material , intermetallic , nickel titanium , ultimate tensile strength , scanning electron microscope , composite number , fabrication , fiber , hot pressing , transgranular fracture , intergranular fracture , shape memory alloy , intergranular corrosion , alloy , medicine , alternative medicine , pathology
In this work, a novel superelastic NiTi fiber reinforced NiTi/(Al 3 Ti+Al 3 Ni) metal-intermetallic laminated (SFR-MIL) composites was fabricated via vacuum hot pressing method. In order to accurately determine the reaction products of the fabrication process, the microstructure and phase constituents were analyzed and determined using scanning electron microscopy (SEM), energy dispersive spectroscope (EDS) and x-ray diffraction (XRD). Results showed that Al 3 Ti and Al 3 Ni were formed during fabrication process. In addition, the quasi-static tensile testing results indicated the average UTS and failure strain of SFR-MIL composite are 377.0 MPa and 15.4%, respectively. The compressive tests of SFR-MIL composites manifested that the average peak compressive strength of this class of materials with load perpendicular to layers is 1114.3 MPa, equivalent to or higher than that of some other laminated composites. Then, the fracture mechanisms are discussed, and the results showed that the reaction band is the possible crack initiation due to the stress concentration, and the major fracture mechanisms are intergranular and transgranular fracture modes.