Effect of Pre-Introduced Shear Bands Direction on Deformation Behavior in Zr<SUB>55</SUB>Al<SUB>10</SUB>Ni<SUB>5</SUB>Cu<SUB>30</SUB> Bulk Metallic Glass

Abstract

We investigated the effect of pre-introduced shear bands direction on compressive deformation behavior in Zr 55 Al 10 Ni 5 Cu 30 bulk metallic glass. The compressive deformation behavior varied with the difference of the direction of pre-introduced shear bands with respect to loading direction. The specimen in which shear bands were introduced at an angle of 45 degree to the loading direction showed largest plastic strain. This large plasticity was achieved due to the activity of pre-introduced shear bands and formation of multiple shear bands. The direction of preintroduced shear bands is an important factor to improve the plasticity in bulk metallic glasses.

Work-Hardening Induced Tensile Ductility of Bulk Metallic Glasses via High-Pressure Torsion

“…Through appropriate composition selection, several BMGs have been found to exhibit reasonably good plasticity1213. Moreover, pre-testing of deformation processes, such as rolling1415 and shot-peening16, can delay catastrophic failure. The results showing increased ductility have been obtained from compression tests.…”

Size-dependent plastic stability of Zr-based metallic glass

“…Usually, the mechanical behavior of metallic glasses is strongly sensitive to their chemical composition, processing treatment, and test conditions [14][15][16][17][18][19][20][21][22]. As to the processing treatment, for an identical chemical composition, the metallic glasses with faster cooling rate during solidification favor the nucleation of multiple shear bands and thus exhibit enhanced plastic deformation under compression, indicating a strong microstructure-induced intrinsic size effect on the mechanical behavior of metallic glasses [23][24][25][26].…”

Improvement of dynamic notch toughness for the Zr 56 Co 28 Al 16 bulk metallic glass by local pre-deformation

“…The molecular-dynamic simulations reveal that plasticity and strength can be effectively improved by pre-introduced shear bands [22]. However, the compressive and tensile mechanical properties of BMGs [23,24] were influenced by the pre-introduced shear bands direction. Besides, the plasticity of BMGs was improved by the pre-introduced shear bands with the orientation parallel to the direction of maximum shear stress [25].…”