Respuesta mecánica global y local de metales amorfos en régimen plástico
Amorphous metals are materials with an amorphous structure obtained through a high cooling rate of the corresponding alloy. They have properties such as high hardness, moldability, resilience, strength and wear resistance which are higher than traditional metals. These characteristics make them usef...
Guardado en:
| Autores principales: | , , , , , |
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| Publicado: |
2019
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| Materias: | |
| Acceso en línea: | https://bdigital.uncu.edu.ar/fichas.php?idobjeto=14425 |
| Sumario: | Amorphous metals are materials with an amorphous structure obtained through a high cooling rate of the corresponding alloy. They have properties such as high hardness, moldability, resilience, strength and wear resistance which are higher than traditional metals. These characteristics make them useful for applications such as complex mechanical parts, micromechanics, structures and biomedical applications, among others.However, engineering applications are constrained by the heterogeneity of the plastic regime. In particular, the plastic deformation mechanism is dominated by shear transformation zones that develop shear bands through the alloy, which could lead to abrupt failure of the material. Some methods used to decrease or control the propagation of the shear bands are the inclusion of nanopores or crystalline nanoparticles.Although the effort made it in recent years to understand the behavior of amorphous metals many aspects of their mechanical and constitutive properties are still unknown, particularly relate to both global and local responses of macroplasticity. The understanding of the macromechanical plastic phenomenon is important due to the potential applications of these materials in engineering.In this project the mechanical behavior of amorphous metals in the macro scale with plastic strain is investigated. In particular, global and local mechanical responses for amorphous metals with and without pores as well as with crystalline inclusions are studied using numerical experiments. |
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