Theses and Dissertations

Date of Award

12-2022

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Civil Engineering

First Advisor

Dr. Mohsen Amjadian

Second Advisor

Dr. Philip Park

Third Advisor

Dr. Thang Pham

Abstract

When triggered, dynamic strain aging has a significant impact on the microstructural mechanical behavior of austenitic stainless steel 304 high performance alloy. The dynamic strain aging phenomenon has been shown to cause significant additional hardening in several experimental studies. To effectively predict the behavior of the material, it is required to employ a constitutive model that includes dynamic strain aging. The extra hardness brought on by dynamic strain aging is captured in this study by the proposal of a novel constitutive model (VAS model) for Austenitic Stainless Steel (ASS) 304 high performance alloy. As part of this study, the developed model has been applied to austenitic stainless steel 304 to demonstrate its ability to accurately model dynamic strain aging behavior that was discovered over a wide temperature range (723-923 k at 50 k intervals) and strain rates of 0.0001/s and 0.001/s under quasi-static loading. In order to determine which constitutive model best examined the additional hardness caused by DSA, four models—the Voyiadjis-Abed-Song (VAS), Voyiadjis-Abed (VA), Johnson Cook (JC), and modified-Zerilli Armstrong (m-ZA) models—were employed in this work.

Comments

Copyright 2022 Mohammad Mohiuddin. All Rights Reserved.

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