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The effects of alloying composition on plasticity and strength of notched metallic glasses

Saade Abdalkareem JasimMedical Laboratory Techniques Department, Al-maarif University College, Al-anbar-Ramadi, IraqB. K. IsmailovDepartment of Physics Teaching Methods, Tashkent State Pedagogical University named after Nizami, Bunyodkor street 27, Tashkent, UzbekistanMaria Jade Catalan OpulenciaCollege of Business Administration, Ajman University, Ajman, United Arab EmiratesShafik S. ShafikExperimental Nuclear Radiation Group, Scientific Research Center, Al-Ayen University, Thi-Qar, IraqMustafa M. KadhimCollege of technical engineering, The Islamic University, Najaf, IraqHolya A. LaftaAl-Nisour University College, Baghdad, IraqAzher M. AbedDepartment of Air conditioning and Refrigeration, Al-Mustaqbal University College, Babylon, IraqR. SivaramanDepartment of Mathematics, Dwaraka Doss Goverdhan Doss Vaishnav College, University of Madras, Chennai, IndiaHimanshu SharmaDepartment of Computer Engineering and Applications, GLA University, Mathura, IndiaAli Thaeer HammidComputer Engineering Techniques Department, Faculty of Information Technology, Imam Ja’afar Al-Sadiq University, Baghdad, IraqYasser Fakri MustafaDepartment of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, 41001, Iraq

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applicationsjournal2022en

ABI

Annotatsiya

Using notch geometry in the metallic glass (MG) samples, it is possible to improve the homogeneous plasticity and mechanical properties. In this work, the molecular dynamics (MD) simulation was performed to indicate how the alloying composition of MGs can tune the mechanical properties of notched samples. For this purpose, CuZr MGs were constructed through atomic-scale simulation with alloying compositions of Cu 64 Zr 36 , Cu 60 Zr 40 , Cu 54 Zr 46, and Cu 50 Zr 50 , while a symmetrical surface notch was produced at the waistline of samples by removing certain atoms and relaxing the new free surfaces. The tensile loading was also carried out to characterize the plastic deformation and strength in the CuZr MGs. According to the results, Cu 64 Zr 36 and Cu 60 Zr 40 alloys exhibited a localized plastic deformation in the notch region, while the decrease in Cu content, i.e. Cu 54 Zr 46 , led to the generation of nanoscale shear events outside the notch region and extended the deformation area in the body of the sample. The results also indicated that the change in the mechanism of plastic deformation in the notched samples strongly depended on the type and population of polyhedrons rearranged in the backbone structure. Moreover, it was found that the Voronoi volume in the Cu 54 Zr 46 alloy exhibited a gentle increment under the tensile loading in both the notched and un-notched regions, while the Cu-rich MGs, i.e. Cu 64 Zr 36 and Cu 60 Zr 40 , showed a sudden increment of Voronoi volume at the center of the notch region, which was indicative of strain localization in the atomic system.

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Mavzular

Metallic Glasses and Amorphous Alloys Cultural and Historical Studies

Identifikatorlar

DOI: 10.1177/14644207221113042

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