Microstructural Modelling of Dual-Phase Steels Through Polycrystalline Plasticity at RVE Level

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Havacılık ve Uzay Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2019

Tezin Dili: İngilizce

Öğrenci: Gönül Öykü Güngör

Danışman: Tuncay Yalçınkaya

Özet:

In this work the plasticity, localization and the damage behavior of dual phase steels are investigated through both J2 and crystal plasticity frameworks. For this purpose, Voronoi based Representative Volume Elements (RVE) are created with different martensite volume fractions, which are studied at different constant triaxiality values. The micromechanical and the macroscopic constitutive responses are analyzed in detail for considering various loading conditions and microstructural parameters. The results are discussed in comparison to the ones in the literature and the work is concluded with remarks and outlook.