Masters Theses

Abstract

"This research explores the development of advanced steel grades manufactured through Castrip® twin-roll thin strip casting technology, with particular attention to non-grain-oriented electrical Si-Steels (NGOES) and carbide-free bainitic (CFB) steels. The Castrip® process offers a near-net-shape route for producing thin steel strips, which greatly decreases the number of processing stages, lowers energy demand, and reduces carbon dioxide emissions when compared with traditional steel production methods.

In the NGOES part of the study, several industrial Fe–Si steel compositions were cold rolled to final thicknesses ranging from 0.35 mm to 0.15 mm. These materials were then exposed to short-duration continuous annealing at 1025 °C for 30 seconds to replicate industrial manufacturing conditions. The investigation examined how cold reduction, chemical composition, grain size, and crystallographic texture influenced magnetic performance. Steels containing aluminum showed coarser recrystallized grains, a weaker γ-fiber texture, and lower core loss, which contributed to more isotropic magnetic properties.

The CFB steel section centered on alloy development aimed at encouraging the formation of carbide-free bainite during the casting process. In this part, the influence of manganese levels between 1.0 and 2.0 wt.% and chromium additions from 0.0 to 0.5 wt.% was studied with respect to solidification characteristics, phase transformation behavior, resulting microstructures, and mechanical performance. Taken together, the findings indicate that Castrip® is a sustainable and adaptable technology capable of producing both high-quality electrical steels and strong structural steels"-- Abstract, p. iv

Advisor(s)

Buchely, Mario F.

Committee Member(s)

Bartlett, Laura
O'Malley, Ronald J.

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Materials Science and Engineering

Publisher

Missouri University of Science and Technology

Publication Date

2026

Journal article titles appearing in thesis/dissertation

Paper I, found on pages 33–62, has been submitted to Materials and Manufacturing Process Journal.

Paper II, found on pages 63–92, is intended for submission to Steel Research International Materials Journal.

Pagination

xiv, 108 pages

Note about bibliography

Includes_bibliographical_references_(pages 95-106)

Rights

© 2026 Naram Naidu Meesala , All Rights Reserved

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 12622

Download

Share

 
COinS