On the Modelling of the Transient Flow Behavior of Metallic Glasses: Analogy with Portevin-Le Chatelier Effect

Metals

Khalil Hajlaoui¹  Nashmi Hassan Alrasheedi¹  Mohamed Abdelbasset Yousfi²  Zoubeir Tourki²  Bacem Jacem Mahfoudh²  Alain Reza Yavari³ 

[1] Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Othman Ibn Affan Street, Riyadh 11432, Saudi Arabia;Laboratoire de Mécanique de Sousse (LMS), ENISo, Technopole de Sousse, University of Sousse, BP 254 Erriadh 4023, Tunisia;SIMaP-LTPCM, Institut National Polytechnique de Grenoble, 38402 Saint Martin d’Heres, France;

关键词: metallic glasses;    serrated flow;    flow defects;    shear bands;   

DOI  :  10.3390/met6030048

来源: DOAJ

【 摘 要 】

A constitutive model for serrated flow together with a finite element (FE) analysis was developed to simulate discontinuous yielding behavior of metallic glasses, commonly known as serrated flow inhomogeneous deformation. The constructed model is based on transient behavior resulting from the time dependence of the flow defect concentration in the shear bands. The computed results of stress-strain curves were consistent with the experimental data. The main features of the serrated flow effect have also been exhibited by the model.

【 授权许可】

Unknown