Nano İkiz Yapılı Çok Kristalli Au Nano Teline Uygulanan Tek Eksenli Çekme ve Sıkıştırma İşleminin Moleküler Dinamik İncelenmesi

Year 2025, Volume: 25 Issue: 2, 287 - 297

Sefa Kazanç

Abstract

Bu çalışmada nano ikiz yapılara sahip çok kristalli Au nano tellerine tek eksen doğrultusunda uygulanan çekme ve sıkıştırma deformasyon sürecinde meydana gelen mekanik ve yapısal özelliklerdeki değişimler Moleküler Dinamik (MD) benzetim yöntemi kullanılarak incelenmeye çalışıldı. Au nano tel yapılarında ikiz sınır aralığının bir fonksiyonu olarak Hall-Petch (HP) ve ters HP ilişkisi gözlendi. Ters HP ilişkisinin varlığından ikiz sınırlarının, çok kristalli nano tellerin sıkıştırma ve çekme deformasyon işlemlerinde önemli bir rol oynayabileceği belirlendi. Hem sıkıştırma hem de çekme deformasyonu altında nano tel yapılar içerisinde çok sayıda kısmi dislokasyonların oluşumu ve gelişimi tespit edildi.

Keywords

Çoklu kristal, İkiz aralığı, Hall-Petch etkisi, Moleküler Dinamik

Molecular Dynamics Investigation of Uniaxial Tensile and Compressive Deformation Applied to Nanotwin Structured Polycrystalline Au Nanowire

Abstract

In this study, the changes in mechanical and structural properties occurring during the tensile and compression deformation process applied in the uniaxial direction to polycrystalline Au nanowires with nanotwin structures were tried to be examined using the Molecular Dynamics (MD) simulation method. Hall-Petch (HP) and inverse HP relationships were observed in Au nanowire structures as a function of twin boundary spacing. From the existence of the inverse HP relationship, it was determined that twin boundaries may play an important role in the compression and tensile deformation processes of polycrystalline nanowires. The formation and development of numerous partial dislocations within the nanowire structures were detected under both compression and tensile deformation.

Keywords

Polycrystalline, twin spacing, Hall-Petch effect, Molecular Dynamics

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