Effect of Temperature on the Dynamic Mechanical Behaviors of Zr‐Based Metallic Glass Reinforced Porous Tungsten Matrix Composite

Abstract

The dynamic mechanical behaviors of Zr‐based metallic glass reinforced porous tungsten matrix composite were investigated by a split Hopkinson pressure bar at different testing temperatures. The flow stress of the composite decreased, while the ductility increased with increasing testing temperature, which were attributed to that more microcracks were initiated in the tungsten phase as well as more microshear bands were induced in the metallic glass phase with increasing temperature. The failure mode of the composite is a mixture of shearing and axial splitting. The flow layer of the metallic glass phase in the shearing fracture surface at 473 K was longer and thinner than that at 223 K.

Retracted: Development of Bulk Metallic Glass Matrix Composites (BMGMC) by Additive Manufacturing: Modelling and Simulation – A Review: Part A

“…During liquid -solid transformation, second ductile phase can be made to form in ex-situ or in-situ (Fig - 4) fashion which is the introduction of ductile second phase particles in the glassy matrix by external physical addition and mixing (former) [218,221,[280][281][282][283][284][285][286][287][288][289][290] or internal nucleation and growth during solidification (later) [12,18,21,32,203,[291][292][293][294][295][296][297][298][299][300][301][302][303] while during solid -solid transformation this second ductile phases form as a result of heating of glassy solid which can relax or crystallise second phase particles out of full glass structure [37,41,44,257,260,262,264,265,[304][305][306][307]. From process perspective, their production methods ranges from convention...…”

Metallic glass matrix composites

“…Up to now, there exist many different particle-reinforced ex-situ MGMCs, such as WC p / Zr-based [37][38][39], WC p / Cu-based [37], SiC p / Zr-based [37][38][39], SiC p / Cu-based [37,38], Ta p / Zr-based [37][38][39][40], TiB 2p / Mg-based [41], ZrC p / Zr-based [42], porous W / Zr-based [43,44], porous Mo / Mg-based [45,46], porous Ti / Mg-based [47], Ti p /Mg-based [48], porous SiC / Zr-based [49], Cu p / Cu-based [50], TiNb p /Zr-based [51], Ti p / La-based [52], and C p / Zr-based bulk MGMCs (the subscript, p, denoting particles) [53]. All these ex-situ dual-phase composites exhibit toughness at room temperature.…”

“…MGMCs [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53]. During melt infiltration, the extra pressure, the infiltration temperature, and melt / fiber interface have an important effect on the infiltration kinetics.…”

“…where a is the depth of the fatigue-crack tip, and F(λ) is the boundary-correction factor and defined as follows (e.g., for the cylindrical sample): F(λ) = 0.66 -0.02398 λ + 1.664 λ 2 (43) here, λ = a/D, where D is the specimen diameter. The calculation at the final stage of stage II is very close to the experimental data of fine-striation spacings of 330 to 500 nm (Fig.…”