Showing papers by "H.F. Zhang published in 2019"
TL;DR: In this article, two quinary high-entropy alloys MoNbCrVTi and MonbCrZrTi were designed and prepared for the two following goals: the first goal is to search for single-phase high entropy alloys composed of low thermal neutron absorption cross-section elements, and the second goal was to verify the validity of the empirical parameters calculation and CALPHAD (acronym of CALculation of PHAse diagrams) calculation in the initiatory selection process of desired alloys from numerous candidates.
42 citations
TL;DR: In this paper, the microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy are investigated and two different phases, including one disordered BCC (A2) phase and one ordered BCC (B2), are identified in this alloy.
36 citations
TL;DR: Wang et al. as discussed by the authors proposed and verified a new strategy through tailoring the microstructure to suppress the shear band formation and then to impede the fatigue crack initiation, in contrast to the previous way of proliferating shear bands.
14 citations
02 Jan 2019-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the phase metastability of in-situ formed β-Zr/Ti plays a vital role on mechanical properties of β-type bulk metallic glass composites (β-type BMGCs).
Abstract: Phase metastability of in-situ formed β-Zr/Ti plays a vital role on mechanical properties of Zr/Ti-based bulk metallic glass composites (β-type BMGCs). In the current study, internal friction behaviors of Ti50.3Zr33.9Cu4.6Ni2.1Be9.1 BMGC containing metastable β-Ti and Ti50.3Zr27.9Cu4.6Ni2.1Be9.1Mo6 BMGC containing stable β-Ti were investigated by mechanical spectroscopy. Prior to the glass transition temperature Tg, Ti50.3Zr33.9Cu4.6Ni2.1Be9.1 BMGC exhibits pronounced internal friction ascribed to the precipitation of ω-Ti in the metastable β-Ti phase. The current investigation not only reveals the fundamental mechanism of the internal friction process of BMGCs, but also provides an effective method to characterize the metastability of β phases in β-type BMGCs.
10 citations
19 Dec 2019-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, a TiZr-based metallic glass (MG) showed obvious increments in yield strengths, tension-compression strength asymmetry, and deviations of shear-fracture-angle, implying that the MG displays increased resistance to plastic shearing but decreased critical stress for brittle normal fracture.
Abstract: With decreasing the testing temperature, a TiZr-based metallic glass (MG) shows obvious increments in yield strengths, tension-compression strength asymmetry, and deviations of shear-fracture-angle, implying that the MG displays increased resistance to plastic shearing but decreased critical stress for brittle normal fracture. These results well explain the ductile-to-brittle transition of MGs caused by low temperature. Besides, the low-temperature failure criterion was established and applied to various other MGs. It is demonstrated that the MGs with lower Poisson's ratio may be more sensitive to suffer low-temperature induced brittle fracture.
2 citations